CN111618481A - Metal surface high-wear-resistance composite welding layer solder, preparation method and application in metal parts - Google Patents
Metal surface high-wear-resistance composite welding layer solder, preparation method and application in metal parts Download PDFInfo
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- CN111618481A CN111618481A CN202010257546.0A CN202010257546A CN111618481A CN 111618481 A CN111618481 A CN 111618481A CN 202010257546 A CN202010257546 A CN 202010257546A CN 111618481 A CN111618481 A CN 111618481A
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- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
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- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
The invention belongs to the field of metal surface wear-resistant materials, and particularly relates to a high-wear-resistant composite welding layer solder for a metal surface, a preparation method and application of the solder in metal parts, wherein the solder comprises a component A and a component B; the component A comprises the following components in percentage by mass: 75-86% of tungsten; 3-9% of carbon; 7-16% of cobalt; the component B comprises the following components in percentage by mass: 4-9% of chromium; 2-5% of boron; 3-8% of silicon; 2-5% of iron; 0.03-0.08% of titanium; 0.04-0.08% of carbon; 70-88.93% of nickel; mixing tungsten, carbon and cobalt according to the feed ratio of raw materials, stirring, pressing, sintering into blocks, and then crushing and screening to obtain a component A; mixing chromium, boron, silicon, iron, titanium, carbon and nickel according to the feed ratio of the raw materials, stirring, smelting, atomizing, cooling and screening to obtain the component B. The invention has thick welding layer, strong corrosion resistance, long service life, ideal binding force and obvious friction resistance.
Description
Technical Field
The invention belongs to the field of metal surface wear-resistant materials, and particularly relates to a high-wear-resistance composite welding layer solder for a metal surface, a preparation method and application of the high-wear-resistance composite welding layer solder in metal parts.
Background
The wear-resistant treatment of metal surfaces is generally classified into general heat treatment, surface heat treatment and chemical heat treatment. These treatments are intended to improve the surface hardness of the metal material and further to improve the wear resistance. The common heat treatment is quenching, which is used for increasing the hardness, and tempering is usually required after quenching to stabilize the tissue surface heat treatment of the material, and Physical Vapor Deposition (PVD) and Chemical Vapor Deposition (CVD) are common, and the difference between the two is whether the deposited material and the matrix material are chemically reacted or not, which is not reflected by the former and is reflected by the latter. The common characteristic is that the surface hardness of the metal material is greatly improved. The materials used for manufacturing parts of a plurality of mechanical equipment are mainly metals, but the abrasion of metal materials caused by friction is difficult to avoid in use, so that the metal abrasion resistance is particularly important. To prevent the surface of the metal equipment from being worn and corroded, a wear-resistant coating is generally coated on the surface of the metal equipment. Thereby reducing the maintenance cost and improving the utilization rate of the equipment. The existing metal surface wear-resistant material generally has the problems of weak binding force, poor corrosion resistance, thin coating thickness, short service life, insufficient anti-friction capability and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the metal surface high-wear-resistance composite welding layer solder and the preparation method thereof, wherein the metal surface high-thickness welding layer solder has strong corrosion resistance, ideal binding force, remarkable anti-friction performance and high surface hardness, so that the service life of parts is prolonged.
The invention also provides application of the high-abrasion-resistance composite welding layer solder on the metal surface in the aspect of metal parts.
In order to solve the technical problem, the invention is realized as follows:
a high-abrasion-resistance composite welding layer solder for a metal surface comprises a component A and a component B;
the component A comprises the following components in percentage by mass:
75-86% of tungsten;
3-9% of carbon;
7-16% of cobalt;
the component B comprises the following components in percentage by mass:
the manufacturing method of the solder with the high wear-resistant composite solder layer on the metal surface comprises the following steps:
(1) preparation of component A
Mixing tungsten carbide and cobalt according to the feed ratio of raw materials, stirring, pressing, sintering into blocks, and then crushing and screening;
(2) preparation of component B
Mixing chromium, boron, silicon, iron, titanium, carbon and nickel according to the feed ratio of the raw materials, stirring, smelting, atomizing, cooling and screening;
(3) mixing and stirring the component A powder obtained in the step (1) and the component B powder obtained in the step (2) uniformly, and drying to obtain a target product;
(4) and (4) carrying out vacuum packaging on the welding layer material obtained in the step (3).
The application of the solder of the high-abrasion-resistance composite welding layer on the metal surface in the aspect of metal parts is implemented as follows:
(1) designing a processing drawing of a welding layer die and a workpiece according to the part drawing paper; the part is a stamping of a stamping die; the mould material is graphite;
(2) cleaning and drying the parts;
(3) designing a graphite die drawing and a workpiece drawing according to the wear-resistant part and thickness required by the workpiece; processing a graphite die and a workpiece according to the drawing; combining the obtained graphite mold, the workpiece and the wear-resistant welding layer material together, and welding in a vacuum furnace; the welding conditions are heating for 50-80 minutes to 750-850 ℃, maintaining for 15-30 minutes at 750-850 ℃, heating to 900-1110 ℃, and maintaining for 35-70 minutes at 900-1110 ℃.
The application of the solder of the high-abrasion-resistance composite welding layer on the metal surface in the aspect of metal parts is implemented as follows:
(1) designing a welding layer die and a processing drawing of a workpiece according to a drawing of a part, wherein the part is an inner cavity welding layer workpiece; the mould material is ceramic;
(2) the preparation method of the ceramic mould comprises the following steps:
a. cleaning, drying and crushing the ceramic wafer into powder, fully and uniformly mixing the powder with graphene, and pouring the powder into a sand mill for grinding;
b. b, adding water into the product obtained in the step a, stirring, and adding a curing agent and a toughening agent to form a paste; the weight ratio of the curing agent to the toughening agent is 25:12 in sequence;
c. b, putting the paste obtained in the step b into a model die, and putting the model die filled with the paste into a kiln for sintering;
(3) cleaning the obtained ceramic mold and workpiece, combining the ceramic mold, the workpiece and the wear-resistant welding layer material together, and welding in a vacuum furnace, wherein the welding conditions are as follows: heating for 50-80 minutes to 750-850 ℃, maintaining for 15-30 minutes at 750-850 ℃, heating to 900-1110 ℃, maintaining for 35-70 minutes at 900-1110 ℃, heating to 1000-1250 ℃, and maintaining for 50-80 minutes at 1000-1250 ℃.
The application of the solder of the high-abrasion-resistance composite welding layer on the metal surface in the aspect of metal parts is implemented as follows:
(1) designing a processing drawing of a welding layer die and a workpiece according to the part drawing paper; the parts are high-wire guide roller type external welding layer workpieces; the material of the mould is corundum sand;
(2) cleaning and drying the parts;
(3) manufacturing a sand mould and a workpiece according to a drawing and preparing corundum sand; the die, the workpiece, the corundum and the wear-resistant welding layer material are combined together and welded in a vacuum furnace. The welding conditions are as follows: heating for 50-80 minutes to 750-850 ℃, maintaining for 15-30 minutes at 750-850 ℃, heating to 900-1110 ℃, maintaining for 35-70 minutes at 900-1110 ℃, heating to 1000-1250 ℃, and maintaining for 70-100 minutes at 1000-1250 ℃.
The application of the solder of the high-abrasion-resistance composite welding layer on the metal surface in the aspect of metal parts is implemented as follows:
(1) designing a welding layer mold according to the part drawing paper, and determining a mold material; the parts are externally welded with a wear-resistant layer, the die is locally welded with the wear-resistant layer, and the pipe is internally welded with the wear-resistant layer; designing a ceramic die, a graphite die, a sand die and a workpiece processing drawing according to the wear-resistant part and the thickness required by the workpiece; processing a welding die and a workpiece according to the design drawing requirement;
(2) cleaning and drying the parts;
(3) combining the ceramic mold, the graphite mold or the sand mold with the workpiece and the welding flux of the wear-resistant welding layer, and placing the combined product into a vacuum furnace for welding and forming.
The welding layer has strong bonding force (belonging to metallurgical bonding), high thickness, good wear resistance and corrosion resistance, long service life, ideal corrosion resistance and obvious friction resistance. The invention has strong acid corrosion resistance, and has no effect on common acids except nitric acid and aqua regia. The welding layer of the invention can form a layer of compact and firm lubricating film on the surface of the workpiece, and the contact between the metal matrix and the air is cut off, so that the corrosion phenomenon is not easy to occur.
Results of frictional wear detection experiment
Intelligent detection on metal wear performance by using wear testing machine
Second, detection principle
A disc-pin type experiment is carried out by using an abrasion tester, and the sample is subjected to dry friction under a certain loading condition. Obtaining different abrasion amounts in different abrasion time, and measuring the abrasion amounts by using a balance; the friction torque and friction coefficient are obtained by a microcomputer recording system.
Third, detection equipment
A computer: MG-2000 model high-speed high-temperature friction and wear testing machine:
electronic balances (sartorious, BS224S, Max220g, d 0.0001 g);
fourthly, the size of the pattern: phi 6mm by 10 mm; friction pair W18Cr4V (round piece 60mm in diameter);
fifthly, data processing
The abrasion time is taken as a horizontal axis, the abrasion amount is taken as a vertical axis, an abrasion amount-time curve is drawn, the time is taken as a horizontal axis, the friction coefficient is taken as a vertical axis, and a friction coefficient-time curve is drawn. The two sample curves are plotted together for comparison.
Sixth, error
The loading error of the abrasion tester is 1%; the error of the rotating speed is 2 percent; the moment error is 1%.
Test results (abrasion loss mg)
| Time (min) | 20 | 40 | 60 | 80 |
| Welding layer material (1#) | 0.3 | 0.8 | 1.0 | 3.8 |
| Cr12MoV(2#) | 2.9 | 7.5 | 11.8 | 47.5 |
| WuII (3#) | 10.2 | 14.3 | 20.7 | 28.4 |
| Upper III (4#) | 20.4 | 39.1 | 61.8 | 107.7 |
The data clearly show that the welding layer material (1#) adopted by the invention has wear resistance. Referring to fig. 6, fig. 6 is a wear weight loss-time curve of the present invention, and it is apparent from the wear weight loss curve of fig. 6 that the wear resistance of the material (1#) of the welding layer of the present invention is adopted.
Drawings
FIG. 1 is a schematic view of a first workpiece welding configuration according to the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of a second workpiece weld of the present invention;
FIG. 4 is a schematic view of a third process for welding workpieces according to the present invention;
FIG. 5 is a cross-sectional view taken midway along line A in FIG. 4 in accordance with the present invention;
fig. 6 is a graph of the loss on abrasion versus time of the present invention.
In the figure: 1. a substrate; 2. welding layer; 3. a graphite mold; 4. sand molding; 5. a container; 6. and (3) forming a ceramic mold.
Detailed Description
The present invention will be further described with reference to the following examples. The scope of the invention is not limited to the following list.
Example 1
A high-abrasion-resistance composite welding layer solder for a metal surface comprises a component A and a component B;
the component A comprises the following components in percentage by mass:
75% of tungsten;
9% of carbon;
16% of cobalt;
the component B comprises the following components in percentage by mass:
the manufacturing method of the solder with the high wear-resistant composite solder layer on the metal surface comprises the following steps:
(1) preparation of component A
Mixing tungsten carbide and cobalt according to the feed ratio of raw materials, stirring, pressing, sintering into blocks, and then crushing and screening;
(2) preparation of component B
Mixing chromium, boron, silicon, iron, titanium, carbon and nickel according to the feed ratio of the raw materials, stirring, smelting, atomizing, cooling and screening;
(3) and (3) mixing and stirring the powder of the component A obtained in the step (1) and the powder of the component B obtained in the step (2) uniformly, and drying to obtain the target product.
(4) And (4) carrying out vacuum packaging on the welding layer material obtained in the step (3).
Example 2
The high-wear-resistance composite welding layer solder on the metal surface comprises a component A and a component B;
the component A comprises the following components in percentage by mass:
86% of tungsten;
3% of carbon;
11% of cobalt;
the component B comprises the following components in percentage by mass:
the manufacturing method of the solder with the high wear-resistant composite solder layer on the metal surface comprises the following steps:
(1) preparation of component A
Mixing tungsten, carbon and cobalt according to the feed ratio of raw materials, stirring, pressing, sintering into blocks, and then crushing and screening;
(2) preparation of component B
Mixing chromium, boron, silicon, iron, titanium, carbon and nickel according to the feed ratio of the raw materials, stirring, smelting, atomizing, cooling and screening;
(3) mixing and stirring the component A powder obtained in the step (1) and the component B powder obtained in the step (2) uniformly, and drying to obtain a target product;
(4) and (4) carrying out vacuum packaging on the welding layer material obtained in the step (3).
The application of the solder of the high-abrasion-resistance composite welding layer on the metal surface in the aspect of metal parts is implemented as follows:
(1) designing a processing drawing of a welding layer mold and a workpiece according to the drawing of the part, wherein the part is an inner cavity welding layer workpiece, and the mold material is determined to be ceramic.
(2) The preparation method of the die material comprises the following steps:
a. cleaning, drying and crushing the ceramic wafer into powder, fully and uniformly mixing the powder with graphene, and pouring the powder into a sand mill for grinding;
b. b, adding water into the product obtained in the step a, stirring, and adding a curing agent and a toughening agent to form a paste;
c. and c, placing the paste obtained in the step b into a model die, and placing the model die filled with the paste into a kiln for sintering.
(3) The ceramic mould is characterized in that: the weight ratio of the curing agent to the toughening agent is 25:12 in sequence.
(4) And cleaning the obtained ceramic die and workpiece. Combining a ceramic die, a workpiece and a wear-resistant welding layer material together, and welding in a vacuum furnace, wherein the welding conditions are as follows: heating for 70 minutes to 800 deg.C for 25 minutes at 800 deg.C, heating to 1000 deg.C for 60 minutes at 1000 deg.C, heating to 1200 deg.C for 60 minutes at 1200 deg.C.
Example 3
The high-wear-resistance composite welding layer solder on the metal surface comprises a component A and a component B;
the component A comprises the following components in percentage by mass:
82.56% of tungsten;
5.88% of carbon;
11.56 percent of cobalt;
the component B comprises the following components in percentage by mass:
the manufacturing method of the solder with the high wear-resistant composite solder layer on the metal surface comprises the following steps:
(1) preparation of component A
Mixing tungsten carbide and cobalt according to the feed ratio of raw materials, stirring, pressing, sintering into blocks, and then crushing and screening;
(2) preparation of component B
Mixing chromium, boron, silicon, iron, titanium, carbon and nickel according to the feed ratio of the raw materials, stirring, smelting, atomizing, cooling and screening;
(3) and (3) mixing and stirring the powder of the component A obtained in the step (1) and the powder of the component B obtained in the step (2) uniformly, and drying to obtain the target product.
(4) And (4) carrying out vacuum packaging on the welding layer material obtained in the step (3).
The application of the solder of the high-abrasion-resistance composite welding layer on the metal surface in the aspect of metal parts is implemented as follows:
(1) and designing a processing diagram of the welding layer mold and the workpiece according to the part drawing paper, wherein the part is an external welding layer, such as a high-speed wire guide roller, and the mold material is determined to be corundum sand.
(2) Cleaning and drying the parts;
(3) manufacturing a sand mould and a workpiece according to the processing drawing and preparing corundum sand; the die, the workpiece, the corundum sand and the wear-resistant welding layer material are combined together and welded in a vacuum furnace. The welding conditions are as follows: heating for 60 min to 800 deg.C, maintaining at 800 deg.C for 25 min, heating to 1000 deg.C, maintaining at 1000 deg.C for 60 min, heating to 1200 deg.C, and maintaining at 1200 deg.C for 80 min.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. .
Claims (6)
1. A high-abrasion-resistance composite welding layer solder for a metal surface is characterized by comprising a component A and a component B;
the component A comprises the following components in percentage by mass:
75-86% of tungsten;
3-9% of carbon;
7-16% of cobalt;
the component B comprises the following components in percentage by mass:
4-9% of chromium;
2-5% of boron;
3-8% of silicon;
2-5% of iron;
0.03-0.08% of titanium;
0.04-0.08% of carbon;
70-88.93% of nickel.
2. The method for manufacturing the metal surface high abrasion resistance composite solder layer according to claim 1, comprising the steps of:
(1) preparation of component A
Mixing tungsten carbide and cobalt according to the feed ratio of raw materials, stirring, pressing, sintering into blocks, and then crushing and screening;
(2) preparation of component B
Mixing chromium, boron, silicon, iron, titanium, carbon and nickel according to the feed ratio of the raw materials, stirring, smelting, atomizing, cooling and screening;
(3) uniformly mixing and stirring the component A powder obtained in the step (1) and the component B powder obtained in the step (2), and drying to obtain a target product;
(4) and (4) carrying out vacuum packaging on the welding layer material obtained in the step (3).
3. The use of the high wear resistant composite solder layer on metal surface according to claim 1 for metal parts, is characterized in that the following steps are carried out:
(1) designing a processing drawing of a welding layer die and a workpiece according to the part drawing paper; the part is a stamping of a stamping die; the mould material is graphite;
(2) cleaning and drying the parts;
(3) designing a graphite die drawing and a workpiece drawing according to the wear-resistant part and thickness required by the workpiece; processing the graphite mold and the workpiece according to the drawing; combining the obtained graphite mold, the workpiece and the wear-resistant welding layer material together, and welding in a vacuum furnace; the welding conditions are heating for 50-80 minutes to 750-850 ℃, maintaining for 15-30 minutes at 750-850 ℃, heating to 900-1110 ℃, and maintaining for 35-70 minutes at 900-1110 ℃.
4. The use of the high wear resistant composite solder layer on metal surface according to claim 1 for metal parts, is characterized in that the following steps are carried out:
(1) designing a welding layer die and a processing drawing of a workpiece according to a drawing of a part, wherein the part is an inner cavity welding layer workpiece; the mould material is ceramic;
(2) the preparation method of the ceramic mould comprises the following steps:
a. cleaning, drying and crushing the ceramic wafer into powder, fully and uniformly mixing the powder with graphene, and pouring the powder into a sand mill for milling;
b. b, adding water into the product obtained in the step a, stirring, and adding a curing agent and a toughening agent to form a paste; the weight ratio of the curing agent to the toughening agent is 25:12 in sequence;
c. b, putting the paste obtained in the step b into a model die, and putting the model die filled with the paste into a kiln for sintering;
(3) cleaning the obtained ceramic mold and workpiece, combining the ceramic mold, the workpiece and the wear-resistant welding layer material together, and welding in a vacuum furnace, wherein the welding conditions are as follows: heating for 50-80 minutes to 750-850 ℃, maintaining for 15-30 minutes at 750-850 ℃, heating to 900-1110 ℃, maintaining for 35-70 minutes at 900-1110 ℃, heating to 1000-1250 ℃, and maintaining for 50-80 minutes at 1000-1250 ℃.
5. The use of the high wear resistant composite solder layer on metal surface according to claim 1 for metal parts, is characterized in that the following steps are carried out:
(1) designing a processing drawing of a welding layer die and a workpiece according to the part drawing paper; the parts are high-speed wire guide roller type external welding layer workpieces; the material of the mould is corundum sand;
(2) cleaning and drying the parts;
(3) manufacturing a sand mould and a workpiece according to a drawing and preparing corundum sand; combining a die, a workpiece, corundum and a wear-resistant welding layer material together, and welding in a vacuum furnace, wherein the welding conditions are as follows: heating for 50-80 minutes to 750-850 ℃, maintaining for 15-30 minutes at 750-850 ℃, heating to 900-1110 ℃, maintaining for 35-70 minutes at 900-1110 ℃, heating to 1000-1250 ℃, and maintaining for 70-100 minutes at 1000-1250 ℃.
6. The use of the high wear resistant composite solder layer on metal surface according to claim 1 for metal parts, is characterized in that the following steps are carried out:
(1) designing a welding layer mold according to the part drawing paper, and determining a mold material; the parts are externally welded with a wear-resistant layer, the die is locally welded with the wear-resistant layer, and the pipe is internally welded with the wear-resistant layer; designing a ceramic die, a graphite die, a sand die and a workpiece processing drawing according to the wear-resistant part and thickness required by the workpiece; processing a welding die and a workpiece according to the design drawing requirement;
(2) cleaning and drying the parts;
(3) combining the ceramic mold, the graphite mold or the sand mold with the workpiece and the welding flux of the wear-resistant welding layer, and placing the combined product into a vacuum furnace for welding and forming.
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