CN108453332B - Brazing process for vacuum brazing TiAl-based alloy by using amorphous Ti-Zr-Cu-Ni brazing filler metal - Google Patents

Brazing process for vacuum brazing TiAl-based alloy by using amorphous Ti-Zr-Cu-Ni brazing filler metal Download PDF

Info

Publication number
CN108453332B
CN108453332B CN201810126646.2A CN201810126646A CN108453332B CN 108453332 B CN108453332 B CN 108453332B CN 201810126646 A CN201810126646 A CN 201810126646A CN 108453332 B CN108453332 B CN 108453332B
Authority
CN
China
Prior art keywords
brazing
heating
multiplied
preserving heat
heating rate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810126646.2A
Other languages
Chinese (zh)
Other versions
CN108453332A (en
Inventor
蔡雨升
刘仁慈
崔玉友
杨锐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Metal Research of CAS
Original Assignee
Institute of Metal Research of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institute of Metal Research of CAS filed Critical Institute of Metal Research of CAS
Priority to CN201810126646.2A priority Critical patent/CN108453332B/en
Publication of CN108453332A publication Critical patent/CN108453332A/en
Application granted granted Critical
Publication of CN108453332B publication Critical patent/CN108453332B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
    • B23K1/206—Cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/008—Soldering within a furnace

Abstract

The invention relates to the field of TiAl-based alloy brazing, in particular to a brazing process for vacuum brazing of a TiAl-based alloy by using an amorphous Ti-Zr-Cu-Ni brazing filler metal, which solves the problems of insufficient research on the existing vacuum brazing process of the TiAl-based alloy by using the amorphous Ti-Zr-Cu-Ni brazing filler metal and the like. The brazing filler metal of the invention comprises Zr: 25.0% -40.0%; cu: 10.0% -20.0%; ni: 10.0% -20.0%; the balance being Ti. The preparation method comprises the following steps: firstly, weighing raw materials; secondly, putting the raw materials into a smelting device, vacuumizing, filling argon, smelting for many times and cooling; thirdly, carrying out quenching and strip throwing on the smelted mother alloy to obtain the amorphous brazing filler metal. And according to the temperature of 880-1030 ℃, the surface roughness (Ra) for 0-120 min: 3.2-0.5 μm, solder area: more than 0 to 7cm × 7cm, thickness of the brazing filler metal: the brazing process is performed with a brazing process of more than 0 to 50 μm. The invention optimizes and supplements the brazing process of vacuum brazing TiAl-based alloy by using the amorphous Ti-Zr-Cu-Ni brazing filler metal, and provides a sufficient and valuable theoretical basis for the application of the brazing filler metal.

Description

Brazing process for vacuum brazing TiAl-based alloy by using amorphous Ti-Zr-Cu-Ni brazing filler metal
Technical Field
The invention relates to the field of TiAl-based alloy brazing, in particular to a brazing process for vacuum brazing of a TiAl-based alloy by using an amorphous Ti-Zr-Cu-Ni brazing filler metal.
Background
In recent years, with the rapid development of the aviation and aerospace industries, higher requirements are also placed on the performance of key components of the industries, and therefore, the development of novel high-performance structural materials is urgent. The excellent operational performances of modern military fighters, such as tactical maneuverability, short takeoff, supersonic cruise, etc., depend to a great extent on the application of advanced high thrust-to-weight ratio aircraft engines. The aero-engine is the heart of the aircraft, and the performance of the aero-engine is directly determined by the performance of the aircraft. The development requirements of the aeroengine are to a great extent the requirements of new materials and new processes. Advanced new materials and their related processes are the technological base of the development of aircraft engines. The materials used for aeroengines should have the following main properties:
(1) high thermal stability. Such as combustion chambers, guide vanes and turbine blade material.
(2) Sufficient high temperature strength (or heat resistance). Such as guide vanes, turbine blades and disks.
(3) Sufficient fatigue limit. Namely: the high temperature toughness should be sufficient to avoid fracture damage under the operating conditions of high velocity gas flow pulsations, severe acoustic frequencies of the engine, mechanical vibrations, and high speed rotation, such as turbine blade and turbine disk materials.
(4) High thermal shock resistance. Such as combustors, turbine blades, guide vanes, afterburner materials.
In the case of aircraft engines, the research in the present stage mainly focuses on both increasing the operating temperature and reducing the weight of the engine components, and therefore, the material of choice for aircraft and aerospace engines should have "lighter, stronger and more heat-resistant" characteristics. In recent years, intermetallic materials having a low density, a high melting point, and a high elastic modulus have gradually entered the field of view of researchers. These intermetallic compounds are mainly: Ti-Al system, Fe-Al system, Ni-Al system, and novel intermetallic compounds having a high melting point and a complex structure. Among these materials, Ti-Al based alloys are receiving increasing attention. According to the research report of the American aerospace agency, 20% -25% of the preparation materials of the engine adopt the gamma-TiAl base alloy by 2020. The advantages of the gamma-TiAl-based alloy are as follows:
(1) the specific rigidity of the gamma-TiAl-based alloy is 50 percent higher than that of other aeroengine structural materials. The method is beneficial to parts with low clearance requirement and improves the service life of parts such as the blade and the like;
(2) the gamma-TiAl-based alloy has good creep property within the temperature range of 600-750 ℃, so that the gamma-TiAl-based alloy can replace some nickel-based high-temperature alloy components, thereby achieving the purpose of reducing weight;
(3) the gamma-TiAl-based alloy has excellent flame retardant capability, so that the gamma-TiAl-based alloy can replace expensive flame retardant titanium alloy. Compared with nickel-based high-temperature alloy, the gamma-TiAl-based alloy not only can improve the service temperature of a combustion chamber and a high-temperature skin structure, but also can greatly improve the thrust-weight ratio of the jet engine. In addition, the gamma-TiAl-based alloy also has the advantages of high specific strength, good high-temperature performance, excellent oxidation resistance and the like, so the gamma-TiAl-based alloy has wide application prospect in the fields of aviation, aerospace and the like, and is an ideal material for replacing nickel-based high-temperature alloy.
The application of TiAl-based alloy in engineering inevitably involves the connection problem, and the currently developed TiAl-based alloy connection technology mainly comprises electron beam welding, laser welding, self-propagating high-temperature synthesis reaction welding, diffusion welding, friction welding, brazing and the like. The research result of the welding method of the TiAl-based alloy shows that the welding method can connect the TiAl-based alloy, but the welding manufacturability is poor. This is mainly due to the intrinsic brittleness of TiAl-based alloys, which makes their weld joints susceptible to cracking. Compared with a fusion welding method, the solid-state connection method has the characteristics of small heat input amount, relatively easy control of a welding heat cycle process, capability of designing connection process parameters meeting the performance characteristics of the TiAl-based alloy through tests and the like, and accordingly, the connection quality is improved. Therefore, a great deal of research is carried out on solid-state connection at home and abroad, and the adopted connection methods comprise diffusion welding, self-propagating high-temperature synthesis, friction welding and the like. However, these solid-state joining methods have their own advantages and disadvantages, and none of them can obtain a sufficiently satisfactory welded joint. For example, the form of the friction welding head is limited, and it is difficult to connect members having complicated shapes. Research on TiAl-based alloy diffusion connection shows that the brittle phase of the joint interface is more, and the dispersity of the joint strength is higher. Due to the characteristic of instantaneous violent reaction of the connection method of self-propagating high-temperature synthesis (SHS), the porosity of the TiAl-based alloy joint actually obtained is large, and the joint strength is dispersed. Compared with the prior art, the brazing method has the advantages of low brazing temperature, small influence on base materials, small joint residual stress, capability of selecting various filling metals according to the requirements of the connection temperature and the joint strength, suitability for connecting refractory metals, dissimilar metals and the like, and has good prospect for connecting the TiAl-based alloy by adopting the brazing method. Therefore, the researchers have conducted a great deal of research on brazing of TiAl-based alloys, such as:
(1) leersis et Al vacuum brazes Ti-48Al-2Cr-2Nb (at.%) alloys with amorphous ti41.7-zr26.7-cu14.7-ni13.8-co3.1 (wt.%) alloys. The results of the study showed that the braze joint consisted of Ti3Al phase and gamma-Ti2Cu/Ti2Ni phase composition, brazingThe temperature and the heat preservation time have important influence on the microstructure and the mechanical property of the soldered joint. As the brazing temperature rises and the holding time is prolonged, the room-temperature tensile property of the joint shows a trend of increasing and then decreasing. When the brazing temperature is 950 ℃ and the heat preservation time is 5min, the maximum room-temperature tensile strength of the joint is 316 MPa. Cracks in gamma-Ti2Cu/Ti2The Ni phase nucleates and propagates along the phase, causing brittle fracture of the specimen.
(2) The co-crystal alloy of Ti-28 Ni (wt.%) was vacuum brazed with Ti-45 Al-8.5 Nb- (W, B, Y) (at.%) alloy by Song Xiao et Al. The results show that the braze joint was made of Ti3Al phase, Ti2Ni phase and B2 phase. The maximum shearing strength of the soldered joint is 204MPa, and the soldering process is 1100 ℃/10 min. All braze samples exhibited brittle fracture characteristics, and the fracture location changed with increasing braze temperature.
(3) Li et Al vacuum brazed Ti-47 Al-2 Nb-2 Cr-0.15B (in.%) alloys using Ti-25.65Zr-13.3Cu-12.35Ni-3Co-2Mo (in wt.%). The result shows that the room temperature shear strength of the joint shows a trend of increasing and then decreasing with the increase of the brazing temperature, the maximum shear strength is 211MPa, and the brazing process is 1000 ℃/5 min. When the test temperature is lower than 700 ℃, the shear strength of the brazing joint can be maintained above 155 MPa. However, when the test temperature exceeds 700 ℃, the shear strength is drastically reduced due to solid state diffusion and severe oxidation occurring at the center of the weld. All samples exhibited brittle fracture characteristics.
(4) The Ti-42.5 Al-9V-0.3Y (at.%) alloy is vacuum brazed with TiNi-V25 (at.%) eutectic alloy by Song Xiao et Al. The experimental result shows that the brazing joint mainly consists of B2 phase and tau3-Al3NiTi2Phase composition. The maximum shearing strength of the soldered joint is 196MPa, and the soldering process is 1220 ℃/10 min. Tau due to brittleness3-Al3NiTi2Phase, the specimen exhibits a typical brittle fracture characteristic, and the fracture position is associated with τ3-Al3NiTi2The phase content and distribution are related.
However, as can be seen from the above studies, studies of scholars are mainly focused on three aspects, namely: solder composition, soldering temperature and holding time, while other soldering processes are less studied. The brazing process is further optimized in detail, so that the function of the brazing filler metal can be more fully exerted, and the performance of a brazing joint is improved.
Disclosure of Invention
Aiming at the defects in the vacuum brazing TiAl-based alloy process, the invention aims to provide a brazing process for vacuum brazing TiAl-based alloy by using an amorphous Ti-Zr-Cu-Ni brazing filler metal, solves the problem of insufficient research on the existing vacuum brazing TiAl-based alloy brazing process by using the amorphous Ti-Zr-Cu-Ni brazing filler metal, and provides a sufficient theoretical basis for the application of the brazing filler metal in practical engineering.
The technical scheme of the invention is as follows:
before brazing, sequentially carrying out ultrasonic cleaning on the prepared amorphous Ti-Zr-Cu-Ni solder and a TiAl-based alloy to-be-welded sample in a petroleum ether solution and an ethanol solution for 20min respectively to remove surface impurities, taking out and drying, assembling the sample in a brazing clamp according to the sequence of the TiAl-based alloy/solder/TiAl-based alloy, and placing the sample in a vacuum furnace for brazing; according to the conditions of 880-1030 ℃, 0-120min and the surface roughness Ra of the parent material: 3.2-0.5 μm, solder area: more than 0 to 7cm × 7cm, thickness of the brazing filler metal: the brazing process is carried out with a vacuum degree of not less than 5 x 10 during brazing process, wherein the vacuum degree is more than 0-50 mu m-3And Pa, when the furnace temperature is cooled to the room temperature after the brazing process is finished, taking out the brazing sample from the vacuum furnace to prevent the sample from being oxidized at high temperature.
The invention has the advantages and beneficial effects that:
the invention aims to optimize the brazing process of vacuum brazing TiAl-based alloy by using the amorphous Ti-Zr-Cu-Ni brazing filler metal, solve the problem of insufficient research on the existing vacuum brazing TiAl-based alloy brazing process by using the amorphous Ti-Zr-Cu-Ni brazing filler metal, and provide a sufficient and valuable theoretical basis for the application of the brazing filler metal in practical engineering.
Drawings
FIG. 1 microstructure morphology of solder braze joints of different areas: (a) greater than 0 to 4cm x 4 cm; (b)4cm × 4cm-5cm × 5 cm; (c) 5 cm.times.5 cm-6 cm.times.6 cm and (d)6 cm.times.6 cm-7 cm.times.7 cm.
FIG. 2 shows the microstructure appearance of the brazing joints of base metals with different surface roughness: (a) 3.2-2 μm; (b) 2-1.5 μm; (c)1.5 μm to 1 μm and (d)1 μm to 0.5. mu.m.
FIG. 3 microstructure morphology after brazing of different thickness: (a) greater than 0 to 25 μm; (b) 25-30 μm; (c) 30-35 μm; (d)35 μm to 40 μm and (e)40 μm to 45 μm.
Detailed Description
In the specific implementation process, the TiAl-based alloy amorphous Ti-Zr-Cu-Ni solder comprises the following components in percentage by weight: 25.0% -40.0%; cu: 10.0% -20.0%; ni: 10.0% -20.0%; the balance being Ti.
1. The TiAl-based alloy amorphous Ti-Zr-Cu-Ni solder is prepared by the following steps and processes:
and sequentially filling sponge titanium, high-purity simple substance zirconium, nickel and copper elements which are well proportioned into a smelting furnace, and smelting into a brazing filler metal master alloy ingot in a vacuum arc smelting furnace. In addition, during smelting, argon is filled into the vacuum chamber, so that oxidation, burning loss and volatilization in the smelting process can be further reduced. During the melting process, the arc loading current does not exceed 500A. After the brazing filler metal alloy is fully melted, the brazing filler metal is fully mixed by using electromagnetic stirring; and remelting the solidified brazing filler metal for at least ten times to ensure that the brazing filler metal is uniformly mixed. In order to prevent component segregation and ensure the uniformity of the brazing filler metal components, the smelted brazing filler metal alloy ingot is annealed for 8-12h in a vacuum heat treatment furnace.
The brazing filler metal thin strip is prepared by a single-roll quenching method, and the preparation process comprises the following steps:
(1) crushing the brazing alloy ingot prepared by the method, and filling the crushed ingot into a quartz tube of a melt spinning machine; the nozzle size of the quartz tube is as follows: the length a is 6-8mm, and the width b is 0.05-0.1 mm;
(2) clamping a quartz tube in an induction heating coil, and adjusting the distance from a nozzle to the surface of a copper single roller to be 0.2-0.3mm to ensure that a steady flow state is formed during injection;
(3) using a mechanical pump to pump vacuum to 1.5X 10-1Pa above, molecular pump pumping high vacuum to 3 × 10-3Pa above, then filling the cavity with high-purity Ar gas;
(4) starting a high-frequency power supply, carrying out high-frequency induction heating on the brazing filler metal master alloy until the brazing filler metal master alloy is completely and uniformly melted, and then keeping the temperature of the overheated melt for 0.1-2 minutes;
(5) starting a motor, selecting a copper roller with the diameter of 220-240mm and the width of 30-50mm, and adjusting the rotating speed of the copper roller;
(6) regulating Ar gas pressure to 0.1-0.3MPa, continuously spraying overheated melt in a quartz glass tube to the surface of a cooling copper roller rotating at high speed by using high-pressure argon gas, and quenching liquid metal to form a foil strip shape so as to obtain the thin strip solder used by the invention;
the thickness of the quenching amorphous solder foil prepared by the process is 0.050 +/-0.004 mm, the surface is smooth, and the two sides are flat.
2. Brazing process optimization of vacuum brazing TiAl-based alloy by amorphous Ti-Zr-Cu-Ni brazing filler metal
According to the requirements of GB/T11363.2008 soldered joint strength test method, the surface roughness is subdivided into 4 grades, which are respectively: ra: 3.2 μm to 2 μm, Ra: 2 μm to 1.5 μm, Ra: 1.5 μm to 1 μm and Ra: 1 μm to 0.5 μm, and the surface smoothness of the base material is gradually improved with the decrease of the surface roughness value. Before brazing, the brazing filler metal is processed into 4 brazing filler metals with different specifications, and the brazing filler metal area is as follows: more than 0 to 4cm X4 cm, 4cm X4 cm-5cm X5 cm, 5cm X5 cm-6cm X6 cm and 6cm X6 cm-7cm X7 cm (brazing sample size M10mm X phi 5 mm). And then treating the thickness of the brazing filler metal, wherein the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm, 25 μm-30 μm, 30 μm-35 μm, 35 μm-40 μm, 40 μm-45 μm and 45 μm-50 μm.
3. Soldering
Since the quality of the sample surface during brazing has a significant influence on the brazing process and the joint performance, the surface of the welded sample is treated as follows: grinding by a grinding machine → polishing by a surface → ultrasonic vibration cleaning by petroleum ether solution (removing oil stain on the surface and adsorbing impurities) → washing by alcohol and drying by blowing. And placing the brazing filler metal in two TiAl alloy brazing samples, and clamping by adopting a special clamp. Subsequently, the assembled clip is assembledThe device is put into a vacuum furnace for welding. The vacuum degree in the soldering process is not less than 5 x 10-3Pa, firstly heating the sample to 800 ℃ at the heating rate of 10-15 ℃/min, keeping the temperature for 10min, and then heating to the brazing temperature at the heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-1030 ℃, and the keeping time is 0-120 min. When the furnace temperature is cooled to room temperature after the brazing process is finished, the brazing sample is taken out from the vacuum furnace to prevent the sample from being oxidized at high temperature.
4. Microstructure of soldered joint after soldering by different soldering processes
As can be seen from fig. 1, as the solder area increases, the thickness of the residual solder region shows a tendency of decreasing and then increasing, and the content of the dark gray phase therein also shows such a tendency of variation. Such changes in the microstructure of the braze joint result in braze joint tensile properties at room temperature that also exhibit similar trends. Therefore, according to the above experimental results, the area of the amorphous Ti-Zr-Cu-Ni solder used for vacuum brazing of the TiAl-based alloy is preferably 5cm × 5cm to 6cm × 6cm, and the maximum room-temperature tensile strength of the brazed joint at this time is 320 MPa.
The brazing process mainly comprises 3 stages of melting, wetting and spreading, diffusion and reaction. The properties of the soldered joints depend on the diffusion and reaction processes between the base material and the solder, which depend on the wetting and spreading processes of the solder. Therefore, the wetting and spreading process of the liquid solder on the surface of the base metal is the premise of obtaining good performance of the soldered joint. Generally, the rougher the surface of the base material, the better the wettability of the liquid brazing material. This is because the rough and uneven surface of the base material increases the capillary action on the molten solder, and the walls of the capillary gap are the basis of nucleation and growth during the cooling crystallization process, which is advantageous for the crystallization nuclei. Meanwhile, the rough surface also increases the contact area between the base metal and the liquid brazing filler metal, so that the solderability is improved. However, too rough surface of the base material may cause uneven distribution of the brazing material, which is not favorable for improving the performance of the brazed joint. Therefore, it is necessary to investigate the influence of the surface roughness of the base material on the brazing performance. According to the requirement of GB/T11363.2008 method for testing the strength of soldered joint, the surface roughness of the soldering parent metal is 3.2 μm, so based on the standard, the surface roughness is divided into 4 grades, which are respectively: 3.2 μm to 2 μm, 2 μm to 1.5 μm, 1.5 μm to 1 μm, and 1 μm to 0.5 μm, the surface smoothness of the base material gradually improved as the surface roughness value decreased. FIG. 2 shows the microstructure of the brazed joint after brazing of the base materials having different surface roughness. As can be seen by comparing fig. 2(a) - (d), the soldered joint can be clearly divided into two regions, respectively, a diffusion region (I) and a residual solder region (II), as shown in fig. 2 (d). As is apparent from fig. 2, as the surface roughness of the base material increases, the shape of the brazed joint and the boundaries between the regions become more uniform. This microstructural morphology of the braze joint also results in a change in its tensile properties. With the increase of the surface smoothness of the parent metal, the tensile property of the brazing joint shows a trend of increasing and then decreasing. Therefore, when the surface roughness of the base material is 1.5 μm to 1 μm, the wetting and spreading process between the brazing filler metal and the base material is in an optimum state, and the room temperature tensile property thereof also reaches a maximum of 354 MPa.
From the above experimental results, it can be seen that the thickness of the residual solder region and the content of the gray phase therein have a direct influence on the properties of the soldered joint. In other words, the lower the content of the residual brazing filler metal region and the gray phase therein, the higher the brazing performance. Therefore, on the premise that the area of the brazing filler metal is determined, the thickness of the brazing filler metal needs to be researched so as to determine the optimal thickness of the brazing filler metal. FIG. 3 is the microstructure morphology of the soldered joint after vacuum brazing of solders of different thicknesses. As can be seen from comparison of fig. 3(a) to (e), as the thickness of the filler metal increases, the width of the residual filler metal region significantly decreases, and the content of the gray phase therein also significantly decreases. The room temperature tensile properties of the soldered joints must also be changed due to this change in the microstructure of the residual solder region. With the gradual increase of the thickness of the solder, the room temperature tensile property of the soldered joint shows a trend of increasing and then decreasing. Therefore, the best tensile properties can be obtained for the brazed joint when the thickness of the solder is 35 μm to 40 μm.
The present invention will be described in further detail below with reference to examples.
Before brazing, sequentially carrying out ultrasonic cleaning on the prepared amorphous Ti-Zr-Cu-Ni solder and the TiAl-based alloy to-be-welded sample in petroleum ether solution and ethanol solution for 10-30min respectively to remove surface impurities, taking out and drying, assembling the samples in a brazing clamp according to the sequence of the TiAl-based alloy/solder/TiAl-based alloy, and placing the samples in a vacuum furnace for brazing.
Brazing process 1, surface roughness of base metal is Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 2, the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 3, the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 4, surface roughness of base metal is Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
And 5, brazing process, wherein the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 6, the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 7, surface roughness of base metal is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 8 is that the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 9, the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 10 is that the surface roughness of a base material is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 11 is that the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 12, surface roughness of base metal is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 13, surface roughness of base metal is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 14, surface roughness of base metal Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 15 is that the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
16, brazing process, wherein the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 17, surface roughness of base metal is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 18 is that the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 19, surface roughness of base metal Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 20 is that the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 21, surface roughness of base metal is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 22 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 23, surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 24 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 25 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 26, surface roughness of base material is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 27 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 28, surface roughness of base material Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 29 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 30 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 31, surface roughness of base metal is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 32 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 33, base metal surface roughness Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 34 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 35 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 36, surface roughness of base material Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 37 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 38 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
And in the brazing process 39, the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 40 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 41, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 42 is that the surface roughness of the base metal is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 43, surface roughness of base material Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 44 is that the surface roughness of the base metal is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 45 is that the surface roughness of the base metal is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 46, surface roughness of base metal Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 47, surface roughness of base metal Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
And (3) a brazing process 48, wherein the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 49, surface roughness of base material Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
50, brazing process, wherein the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 51 is that the surface roughness of the base metal is Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 52, surface roughness of base metal Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 53, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 54, surface roughness of base material Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 55 is that the surface roughness of the base metal is Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 56 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 57, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 58 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 59, surface roughness of base material Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 60, surface roughness of base metal is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 61, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 62, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 63, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 64, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 65, the surface roughness of the parent metal is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 66, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 67 comprises the following steps of: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 68, surface roughness of base material Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 69, surface roughness of base metal Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 70, the surface roughness of the base metal is Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 71, surface roughness of base metal is Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 72, surface roughness of base material Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 73 is that the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 74, surface roughness of base material Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 75, surface roughness of base metal Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 76, surface roughness of base metal Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 77, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 78, base metal surface roughness Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
The brazing process 79 is that the surface roughness of the base metal is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 80, the surface roughness of the base metal is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 0-60 min.
Brazing process 81, surface roughness of base material Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 82, surface roughness of base material Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 83 is that the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 84, surface roughness of base metal Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 85 is that the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 86, surface roughness of base material Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 87 is that the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 88 is that the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 89, wherein the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 90 is that the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 91, surface roughness of base material Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 92 is that the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 93, surface roughness of base metal is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 94, base metal surface roughness Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 95, surface roughness of base metal Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 96, surface roughness of base metal Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 97, the surface roughness of the parent metal is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 98, surface roughness of base metal Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 99, the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process is 100, the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 101 is that the surface roughness of a base material is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 102 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 103 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 104 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 105 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 106, the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 107, surface roughness of base metal is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 108 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 109 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 110 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 111 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 112 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 113 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 114, surface roughness of base material is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 115 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 116, surface roughness of base metal is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 117 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 118 includes the following steps: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 119 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 120, the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 121 includes the following steps: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 122, surface roughness of base material Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 123, surface roughness of base material Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 124, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 125 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 126 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 127, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 128, base material surface roughness Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 129 is that the surface roughness of the base metal is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 130, surface roughness of parent metal is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 131 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 132, surface roughness of base material Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 133, surface roughness of base material Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 134 is that the surface roughness of the base metal is Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 135, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 136 is that the surface roughness of the base metal is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 137, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 138 comprises the following steps of: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 139, the surface roughness of the base metal is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 140 comprises the following steps of: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 141 is that the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 142 comprises the following steps of: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 143, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 144, base metal surface roughness Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 145 is that the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 146, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 147, the surface roughness of the base metal is Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 148, surface roughness of base material Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 149 comprises the following steps of: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 150 comprises the following steps of: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 151 includes the following steps: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 152, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 153 is that the surface roughness of the base metal is Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 154, surface roughness of base material Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 155, base material surface roughness Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 156, base metal surface roughness Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 157 is that the surface roughness of the base metal is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 158, base material surface roughness Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 159, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
The brazing process 160 comprises the following steps of: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the preserving heat time is 60-120 min.
Brazing process 161, base metal surface roughness Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 162, the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 163, base metal surface roughness Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 164, base metal surface roughness Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 165, base material surface roughness Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 166, base metal surface roughness Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 167, the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 168, the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 169 is that the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 170 is that the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 171, surface roughness Ra of base material: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 172 is that the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 173, the surface roughness of the parent metal is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 174, the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 175, the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 176, the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
And 177, brazing process, wherein the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 178, the surface roughness of the parent metal is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 179, surface roughness of parent metal Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 180 is that the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 181 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 182, the base metal surface roughness Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 183 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 184, the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 185 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 186, surface roughness of base metal is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 187, the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 188, base material surface roughness Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 189, base metal surface roughness Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 190 comprises the following steps of: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 191 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 192, the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 193, surface roughness of base material is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 194, the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 195 has the base material surface roughness Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 196, base material surface roughness Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
A brazing process 197, the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 198, the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 199 has the base material surface roughness Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 200 is that the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 201 is that the surface roughness of a base material is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 202 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 203 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 204 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 205 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 206, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 207, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 208 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 209, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 210 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 211 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 212 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 213 includes the following steps: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 214, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 215, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 216 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 217, wherein the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 218, the surface roughness of the parent metal is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 219, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 220 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 221 includes that the surface roughness of a base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 222 is that the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 223, base metal surface roughness Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 224 is that the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 225, base material surface roughness Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 226, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 227, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 228, base material surface roughness Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 229 is that the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 230, the surface roughness of the parent metal is Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 231 includes the following steps: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 232, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 233, base metal surface roughness Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 234 is that the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 235, wherein the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 236, surface roughness of base metal is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 237, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 238, the surface roughness of the parent metal is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
Brazing process 239, surface roughness of base metal is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 240 is that the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 0-60 min.
The brazing process 241 is that the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 242 includes the following steps: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 243, surface roughness of base material Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 244, surface roughness Ra of base material: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 245, the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 246, base metal surface roughness Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 247, the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 248, the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 249 has the base material surface roughness Ra: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 250 comprises the following steps of: 3.2-2 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 251, the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 252 includes the following steps: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 253 is that the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 254, base material surface roughness Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
255, brazing process, wherein the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 256 is that the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 257 comprises the following steps of: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 258 is that the surface roughness of the base metal is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 259, surface roughness of base material Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 260, the surface roughness of the base material is Ra: 3.2-2 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 261, base material surface roughness Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 262, base material surface roughness Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
And 263, brazing process, wherein the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 264, the surface roughness of the base metal is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 265, the surface roughness of the parent metal is Ra: 2-1.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 266, base metal surface roughness Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 267, surface roughness of base material Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 268, the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 269 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 270, the surface roughness of the parent metal is Ra: 2-1.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 271 is that the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 272, the surface roughness of the parent metal is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
273, brazing process, wherein the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 274, base material surface roughness Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 275, the surface roughness of the parent metal is Ra: 2-1.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 276 comprises the following steps of: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 277, surface roughness of parent metal Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 278, the surface roughness of the parent metal is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 279, base metal surface roughness Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 280, the surface roughness of the base material is Ra: 2-1.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 281 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 282 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 283 has the base material surface roughness Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
284, brazing process, wherein the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
In the brazing process 285, the surface roughness of the base metal is Ra: 1.5-1 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 286 comprises the following steps of: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 287, base material surface roughness Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 288, base metal surface roughness Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 289, the surface roughness of the parent metal is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 290, the surface roughness of the base metal is Ra: 1.5-1 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 291, surface roughness of base material Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 292, surface roughness of parent metal Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 293 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 294, base metal surface roughness Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 295, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 296, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 297, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
In the brazing process 298, the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 299 is that the surface roughness of the base material is Ra: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 300 includes the following steps: 1.5-1 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 301, surface roughness of base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 302, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 303, surface roughness of base material Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 304, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 305 is that the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: more than 0 to 4cm multiplied by 4cm, the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 306, surface roughness of parent metal is Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 307, surface roughness of base material is Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 308, the surface roughness of the parent metal is Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 309, base metal surface roughness Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 310 is that the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 4cm multiplied by 4cm to 5cm multiplied by 5cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 311, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 312, base material surface roughness Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 313, surface roughness of base material Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 314, the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 315 is that the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 5cm is multiplied by 5cm to 6cm is multiplied by 6cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 316, the surface roughness of the parent metal is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: greater than 0 to 25 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 317, surface roughness of base material Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 25-30 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 318 is that the surface roughness of the base material is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 30-35 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Brazing process 319, base metal surface roughness Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 35-40 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
The brazing process 320 is that the surface roughness of the base metal is Ra: 1-0.5 μm, the solder area is: 6cm is multiplied by 6cm to 7cm is multiplied by 7cm, and the thickness of the brazing filler metal is as follows: 40-45 μm. Firstly, heating a sample to 800 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 10min, and then heating to a brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the preserving heat time is 60-120 min.
Research on the optimized brazing process shows that:
(1) as the area of the solder is increased, the room temperature tensile property of the soldered joint shows a trend of increasing and then decreasing. When the area of the brazing filler metal is 5cm multiplied by 5cm-6cm multiplied by 6cm, the tensile strength of the brazed joint is 320MPa at most.
(2) The study on the different roughness of the surface of the base material shows that when the surface roughness is increased from 3.2 μm to 0.5 μm, the room temperature tensile property of the brazed joint shows a tendency of increasing and then decreasing. When the surface roughness is 1.5-1 μm, the room temperature tensile property of the brazed joint reaches a maximum of 354 MPa.
(3) Through research on the thickness of the brazing filler metal, a critical value of the concentration of Ti element between the brazing filler metal and a base metal exists along with the increase of the thickness of the brazing filler metal, so that the diffusion of the Ti element presents two different paths. When the thickness of the brazing filler metal is less than 35 mu m, Ti element is diffused into the brazing filler metal from the base material; when the thickness of the brazing filler metal is more than 35 μm, the Ti element in the brazing filler metal is diffused into the base metal instead. When the thickness of the brazing filler metal is 35-40 mu m, the room-temperature tensile property of the brazed joint reaches a maximum value of 368 MPa.

Claims (2)

1. A braze welding process for vacuum braze welding of TiAl-based alloy by using an amorphous Ti-Zr-Cu-Ni brazing filler metal is characterized in that before braze welding, prepared samples to be welded of the amorphous Ti-Zr-Cu-Ni brazing filler metal and the TiAl-based alloy are sequentially subjected to ultrasonic cleaning in petroleum ether solution and ethanol solution for 10-30min respectively to remove surface impurities, taken out and dried, assembled in a braze welding fixture according to the sequence of the TiAl-based alloy/brazing filler metal/TiAl-based alloy, and placed in a vacuum furnace for braze welding; according to 880The temperature is-1030 ℃, the time is 0-120min, and the surface roughness Ra of the parent metal is as follows: 1.5-1 μm, solder area: 5cm multiplied by 5cm-6cm multiplied by 6cm, solder thickness: the brazing process of 35-40 μm is adopted for brazing, and the vacuum degree in the brazing process is not lower than 5 × 10-3Pa, when the furnace temperature is cooled to room temperature after the brazing process is finished, taking out the brazing sample from the vacuum furnace to prevent the sample from being oxidized at high temperature;
one of the following brazing processes is adopted:
(1) heating the sample to 800 ℃ at a heating rate of 10-15 ℃/min, keeping the temperature for 10min, and heating to the brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the heat preservation time is 0-60 min;
(2) heating the sample to 800 ℃ at a heating rate of 10-15 ℃/min, keeping the temperature for 10min, and heating to the brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 880-955 ℃, and the heat preservation time is 60-120 min;
(3) heating the sample to 800 ℃ at a heating rate of 10-15 ℃/min, keeping the temperature for 10min, and heating to the brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the holding time is 0-60 min;
(4) heating the sample to 800 ℃ at a heating rate of 10-15 ℃/min, keeping the temperature for 10min, and heating to the brazing temperature at a heating rate of 15-20 ℃/min, wherein the brazing temperature is 955-1030 ℃, and the heat preservation time is 60-120 min;
the amorphous Ti-Zr-Cu-Ni solder adopts one of the following components and contents:
(1) the brazing filler metal comprises the following components in percentage by weight: 25.0% -30.0%; cu: 10% -15%, Ni: 10% -15%; the balance being Ti;
(2) the brazing filler metal comprises the following components in percentage by weight: 25.0% -30.0%; cu: 10% -15%, Ni: 15% -20%; the balance being Ti;
(3) the brazing filler metal comprises the following components in percentage by weight: 25.0% -30.0%; cu: 15% -20%, Ni: 10% -15%; the balance being Ti;
(4) the brazing filler metal comprises the following components in percentage by weight: 25.0% -30.0%; cu: 15% -20%, Ni: 15% -20%; the balance being Ti;
(5) the brazing filler metal comprises the following components in percentage by weight: 30.0% -35.0%; cu: 10% -15%, Ni: 10% -15%; the balance being Ti;
(6) the brazing filler metal comprises the following components in percentage by weight: 30.0% -35.0%; cu: 10% -15%, Ni: 15% -20%; the balance being Ti;
(7) the brazing filler metal comprises the following components in percentage by weight: 30.0% -35.0%; cu: 15% -20%, Ni: 10% -15%; the balance being Ti;
(8) the brazing filler metal comprises the following components in percentage by weight: 30.0% -35.0%; cu: 15% -20%, Ni: 15% -20%; the balance being Ti;
(9) the brazing filler metal comprises the following components in percentage by weight: 35.0% -40.0%; cu: 10% -15%, Ni: 10% -15%; the balance being Ti;
(10) the brazing filler metal comprises the following components in percentage by weight: 35.0% -40.0%; cu: 10% -15%, Ni: 15% -20%; the balance being Ti;
(11) the brazing filler metal comprises the following components in percentage by weight: 35.0% -40.0%; cu: 15% -20%, Ni: 10% -15%; the balance being Ti;
(12) the brazing filler metal comprises the following components in percentage by weight: 35.0% -40.0%; cu: 15% -20%, Ni: 15% -20%; the balance being Ti.
2. The brazing process of vacuum brazing TiAl-based alloy with the amorphous Ti-Zr-Cu-Ni brazing filler metal according to claim 1, wherein the preparation method of the amorphous Ti-Zr-Cu-Ni brazing filler metal comprises the following steps:
(1) the sponge titanium, the high-purity simple substance zirconium, the nickel and the copper element which are well proportioned are sequentially filled into a smelting furnace, and are smelted into a brazing filler metal master alloy ingot in a vacuum arc smelting furnace, argon is filled into a vacuum chamber during smelting, so that the oxidation, burning loss and volatilization in the smelting process are further reduced, the electric arc loading current does not exceed 500A in the smelting process, and when the brazing filler metal alloy is fully melted, the brazing filler metal is fully mixed by using electromagnetic stirring; remelting the solidified brazing filler metal for at least ten times to ensure uniform mixing of the brazing filler metal, and annealing the smelted brazing filler metal master alloy ingot in a vacuum heat treatment furnace for 8-12 hours in order to prevent component segregation and ensure uniformity of components of the brazing filler metal;
(2) crushing the brazing filler metal master alloy ingot prepared by the method, and filling the crushed ingot into a quartz tube of a melt spinning machine; the nozzle size of the quartz tube is as follows: the length a is 6-8mm, and the width b is 0.05-0.1 mm;
(3) clamping a quartz tube in an induction heating coil, and adjusting the distance from a nozzle to the surface of a copper single roller to be 0.2-0.3mm to ensure that a steady flow state is formed during injection;
(4) using a mechanical pump to pump vacuum to 1.5X 10-1Pa above, molecular pump pumping high vacuum to 3 × 10-3Pa above, then filling the cavity with high-purity Ar gas;
(5) starting a high-frequency power supply, carrying out high-frequency induction heating on the brazing filler metal master alloy until the brazing filler metal master alloy is completely and uniformly melted, and then keeping the temperature of the overheated melt for 0.5-2 minutes;
(6) starting a motor, selecting a copper roller with the diameter of 220-240mm and the width of 30-50mm, and adjusting the rotating speed of the copper roller;
(7) the pressure of Ar gas is adjusted to 0.1-0.3MPa, the superheated melt in the quartz glass tube is continuously sprayed to the surface of a cooling copper roller rotating at high speed by high-pressure argon gas, and the liquid metal is rapidly cooled to form a foil strip shape, so that the amorphous thin-strip solder is obtained, the surface is smooth, and the two sides are flat.
CN201810126646.2A 2018-02-08 2018-02-08 Brazing process for vacuum brazing TiAl-based alloy by using amorphous Ti-Zr-Cu-Ni brazing filler metal Active CN108453332B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810126646.2A CN108453332B (en) 2018-02-08 2018-02-08 Brazing process for vacuum brazing TiAl-based alloy by using amorphous Ti-Zr-Cu-Ni brazing filler metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810126646.2A CN108453332B (en) 2018-02-08 2018-02-08 Brazing process for vacuum brazing TiAl-based alloy by using amorphous Ti-Zr-Cu-Ni brazing filler metal

Publications (2)

Publication Number Publication Date
CN108453332A CN108453332A (en) 2018-08-28
CN108453332B true CN108453332B (en) 2021-01-08

Family

ID=63238833

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810126646.2A Active CN108453332B (en) 2018-02-08 2018-02-08 Brazing process for vacuum brazing TiAl-based alloy by using amorphous Ti-Zr-Cu-Ni brazing filler metal

Country Status (1)

Country Link
CN (1) CN108453332B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3085419B1 (en) * 2018-09-05 2020-08-07 Safran Aircraft Engines MOBILE DAWN
CN111702280B (en) * 2020-05-13 2021-09-24 中国科学院金属研究所 Ti2Medium-temperature Ti-based brazing filler metal special for brazing same or different AlNb-based alloy materials and preparation method and brazing process thereof
CN114952080B (en) * 2022-06-01 2023-07-28 中国航空制造技术研究院 Ti-Zr-Cu-Ni-In amorphous solder for SP700 titanium alloy

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63273592A (en) * 1987-04-30 1988-11-10 Daido Steel Co Ltd Ti brazing material
CN1695877A (en) * 2005-06-27 2005-11-16 中国航空工业第一集团公司北京航空材料研究院 Method for preparing powder of titanium based alloyl solder
CN101172880A (en) * 2007-09-21 2008-05-07 江苏科技大学 Titanium group high temperature amorphous solder of hard solder Si*N* ceramic and method for producing the same
CN102430874A (en) * 2011-11-01 2012-05-02 北京工业大学 Titanium-based amorphous brazing alloy foil strip for brazing and preparation method for foil strip
CN103752972A (en) * 2014-01-15 2014-04-30 哈尔滨东安发动机（集团）有限公司 Method of soldering titanium alloy thin-walled parts with Ti-Cu-Ni-Zr solder
CN105252169A (en) * 2015-09-14 2016-01-20 安徽工程大学 Active amorphous brazing filler metal for brazing ZrB2-SiC ceramic materials, preparation method for active amorphous brazing filler metal and brazing process
CN106363265A (en) * 2016-10-08 2017-02-01 哈尔滨工业大学 Method for brazing SiC and Zr-4 alloy with Ti-Zr-Ni-Cu brazing filler metal
CN106925906A (en) * 2017-01-20 2017-07-07 中国科学院金属研究所 A kind of TiAl-base alloy special-purpose high temperature Ti Zr base solders and preparation method thereof and soldering processes
CN106925905A (en) * 2017-01-20 2017-07-07 中国科学院金属研究所 A kind of TiAl-base alloy special-purpose high temperature Ti base solders and preparation method thereof and soldering processes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7419086B2 (en) * 2003-07-14 2008-09-02 Honeywell International Inc. Low cost brazes for titanium

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63273592A (en) * 1987-04-30 1988-11-10 Daido Steel Co Ltd Ti brazing material
CN1695877A (en) * 2005-06-27 2005-11-16 中国航空工业第一集团公司北京航空材料研究院 Method for preparing powder of titanium based alloyl solder
CN101172880A (en) * 2007-09-21 2008-05-07 江苏科技大学 Titanium group high temperature amorphous solder of hard solder Si*N* ceramic and method for producing the same
CN102430874A (en) * 2011-11-01 2012-05-02 北京工业大学 Titanium-based amorphous brazing alloy foil strip for brazing and preparation method for foil strip
CN103752972A (en) * 2014-01-15 2014-04-30 哈尔滨东安发动机（集团）有限公司 Method of soldering titanium alloy thin-walled parts with Ti-Cu-Ni-Zr solder
CN105252169A (en) * 2015-09-14 2016-01-20 安徽工程大学 Active amorphous brazing filler metal for brazing ZrB2-SiC ceramic materials, preparation method for active amorphous brazing filler metal and brazing process
CN106363265A (en) * 2016-10-08 2017-02-01 哈尔滨工业大学 Method for brazing SiC and Zr-4 alloy with Ti-Zr-Ni-Cu brazing filler metal
CN106925906A (en) * 2017-01-20 2017-07-07 中国科学院金属研究所 A kind of TiAl-base alloy special-purpose high temperature Ti Zr base solders and preparation method thereof and soldering processes
CN106925905A (en) * 2017-01-20 2017-07-07 中国科学院金属研究所 A kind of TiAl-base alloy special-purpose high temperature Ti base solders and preparation method thereof and soldering processes

Also Published As

Publication number Publication date
CN108453332A (en) 2018-08-28

Similar Documents

Publication Publication Date Title
CN110218897B (en) Preparation method of high-temperature-resistant Cu-Cr-Nb-Ce alloy for liner of combustion chamber of aero-engine
CN108453332B (en) Brazing process for vacuum brazing TiAl-based alloy by using amorphous Ti-Zr-Cu-Ni brazing filler metal
CN111702278B (en) Ti2Medium-temperature Ti-based brazing filler metal for brazing same or different AlNb-based alloys as well as preparation method and brazing process thereof
CN114346519B (en) Method for directly brazing TiAl alloy and Ti2AlNb alloy by using high-entropy brazing filler metal foil
CN110394522B (en) Deformed nickel-based alloy and cast Ni3Brazing process of Al-based alloy
CN111702281B (en) Ti2Special intermediate-temperature Zr-based brazing filler metal for brazing same or different AlNb-based alloys as well as preparation method and brazing process thereof
CN103752973B (en) A kind of connection Si 3n 4the mid-tier component of pottery and method
CN106925906B (en) A kind of TiAl-base alloy special-purpose high temperature Ti-Zr base solder and preparation method thereof and soldering processes
KR20100091178A (en) Joining and material application method for a workpiece having a workpiece region comprising a titanium aluminide alloy
CN110355496B (en) High-temperature-resistant solder for gamma-TiAl alloy and brazing process
CN109604865B (en) Zirconium-based solder for connecting TiAl alloy and Ni-based high-temperature alloy
CN111702280B (en) Ti2Medium-temperature Ti-based brazing filler metal special for brazing same or different AlNb-based alloy materials and preparation method and brazing process thereof
CN106925905A (en) A kind of TiAl-base alloy special-purpose high temperature Ti base solders and preparation method thereof and soldering processes
CN102251153A (en) Interlayer alloy of DD6 nickel-based single crystal high temperature alloy used for transient liquid phase (TLP) bonding and preparation method thereof
KR20160146490A (en) A ductile boron bearing nickel based welding material
CN109604861B (en) Iron-based solder for connecting TiAl alloy and Ni-based high-temperature alloy
CN112962013A (en) Single crystal high temperature alloy diffusion epitaxial growth repair material and repair method
Gao et al. Interfacial reaction mechanism of TiBw/Ti6Al4V composites and Inconel 718 alloys by GTAW heat transmission
CN111702277B (en) Ti2Medium-temperature Ti-based brazing filler metal special for brazing same or different AlNb-based alloy materials and preparation method and brazing process thereof
CN109604866B (en) Solder for connecting TiAl alloy and Ni-based high-temperature alloy
CN110253175A (en) Noncrystalline intermediate layer and Crystal Nickel-based Superalloy gradient TLP technique
CN114571024B (en) Vacuum brazing process for reducing corrosion of GH3536 honeycomb and GH4738 ring assembly
CN113478122B (en) Ultrahigh-temperature brazing filler metal for connecting C/SiC composite material and niobium alloy, preparation process thereof and vacuum active brazing method
CN109604864B (en) Titanium-based solder for connecting TiAl alloy and Ni-based high-temperature alloy
CN115194275B (en) Method for brazing dissimilar metals of titanium alloy and nickel-based superalloy

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant