CN110977168A - Connection method of SiCp/Al composite material - Google Patents
Connection method of SiCp/Al composite material Download PDFInfo
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- CN110977168A CN110977168A CN201911341628.7A CN201911341628A CN110977168A CN 110977168 A CN110977168 A CN 110977168A CN 201911341628 A CN201911341628 A CN 201911341628A CN 110977168 A CN110977168 A CN 110977168A
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
Abstract
The invention relates to the technical field of aluminum matrix composite welding, in particular to a method for connecting SiCp/Al composite materials. The connection method comprises the following steps: filling connection powder at the to-be-connected position of the SiCp/Al composite material for pulse laser connection, and performing ultrasonic auxiliary vibration on the to-be-connected position in the pulse laser connection process. The connection method can solve the problem that the SiCp/Al composite material is easy to generate interface reaction at the welding seam to generate Al during laser connection4C3Brittle needle phase, SiC reinforced particle aggregation and growth and poor weldability.
Description
Technical Field
The invention relates to the technical field of aluminum-based composite material connection, in particular to a connection method of a SiCp/Al composite material.
Background
With the rapid development of the fields of aerospace, advanced weapon systems, automobiles, electronics and the like, higher requirements are put forward on materials, the traditional single-structure materials are increasingly difficult to meet the requirements of light weight and high strength, and the rapid development of metal-based composite materials becomes an important research direction.
In the field of metal matrix composite materials, SiC particle reinforced Al-based (SiCp/Al for short) composite materials have a series of advantages of light weight, high specific strength, high specific stiffness, low thermal expansion coefficient, good thermal stability, heat conductivity and electric conductivity, excellent wear resistance and corrosion resistance and the like. Meanwhile, because of rich aluminum resources, compared with light metals such as Ti, Mg and the like, the Al-based composite material has low cost, and the SiC ceramic particles have the characteristics of high strength, low price and the like. Therefore, the SiCp/Al composite material has become one of the most important hotspots in the research field of the metal matrix composite material in the world nowadays, and the development is increasingly directed to the industrial scale production and application. Especially aiming at the requirements of structural function integration, light weight and intelligent development of weaponry, the particle reinforced aluminum-based composite material has wide application prospect in the national defense field such as aerospace and the like.
However, the SiC reinforcing phase of the SiCp/Al composite material has great difference in physical and chemical properties with the Al matrix, and Al is easily generated by interface reaction at a welding line during connection4C3A brittle needle-like phase; in addition, there is an aggregation and growth of the reinforcing particles, and the weldability is poor. Therefore, the problem of the connectivity of the aluminum matrix composite material is solved as soon as possible, which is the key to realize the application value of the aluminum matrix composite material.
At present, aiming at the connection of the particle reinforced aluminum matrix composite, the connection methods which are researched more at home and abroad mainly focus on arc welding, laser welding, diffusion welding, brazing, friction stir welding and the like, and the currently common connection methods are shown in table 1. As can be seen from Table 1, the metal matrix composite material is connected by the conventional fusion welding method, and the defects of brittle intermetallic compounds generated by interface reaction, reinforcing phase aggregation and the like exist; the solid-phase welding method has the problems of low welding efficiency, narrow process window, limited weldment size and joint form and the like.
TABLE 1 SiCp/Al composite welding method comparison
Therefore, in order to further popularize and use the aluminum-based composite material, a more advanced connection technology is urgently needed to be explored, and the key problems of shape control, performance optimization and the like in the connection process of the SiCp/Al composite material are solved.
Disclosure of Invention
The invention aims to provide a connecting method of a SiCp/Al composite material, which can solve the problem that Al is generated by interface reaction easily at a welding seam when the SiCp/Al composite material is connected by laser4C3Brittle needle phase, aggregation of SiC reinforcing particles and poor weldability.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a connection method of a SiCp/Al composite material, which comprises the following steps: filling connection powder at the to-be-connected position of the SiCp/Al composite material for pulse laser connection, and performing ultrasonic auxiliary vibration on the to-be-connected position in the pulse laser connection process.
Preferably, the peak power of the pulse laser is 1.5-2.5 kW, the pulse frequency is 40-60 Hz, and the duty ratio is 50-60%.
Preferably, the scanning speed of the pulse laser is 180-250 mm/min, and the diameter of a light spot is 2-3 mm.
Preferably, the amplitude of the ultrasound is 10-15 μm, the frequency of the ultrasound is 30-40 kHz, and the power of the ultrasound is 80-96W.
Preferably, the filler-bond powder includes a matrix component that is a mixture of a SiC powder and an Al alloy powder, or a mixture of an Al alloy powder and a Ni-clad SiC powder.
Preferably, the filling and connecting powder further comprises a modifying component, and the modifying component comprises Si powder or Ti powder.
Preferably, the modifying component is used in an amount of no more than 10% by mass of the matrix component in the filled and bonded powder.
Preferably, the mode of conveying the filling connection powder is synchronous powder feeding.
Preferably, the equipment for conveying the filling connection powder is a coaxial powder feeder, and the conveying amount of the filling connection powder is 5-6 g/min.
Preferably, before the pulse laser welding, the method further comprises removing oil stains on the surface of the SiCp/Al composite material.
The invention provides a connection method of a SiCp/Al composite material, which comprises the following steps: filling connection powder at the to-be-connected position of the SiCp/Al composite material for pulse laser connection, and performing ultrasonic auxiliary vibration on the to-be-connected position in the pulse laser connection process. The invention adopts the pulse laser for connection, and can obtain a more uniform temperature field by utilizing the smaller heat input of the pulse laser and the cooling effect of the pulse laser in a duty cycle period, reduce the peak temperature of the temperature field and reduce Al4C3The generation of brittle phases; ultrasonic auxiliary vibration is carried out on the positions to be connected in the pulse laser connection process, and the brittle phase intermetallic compound Al with certain thickness can be crushed4C3And the dispersion is uniform, and the method also has the effects of improving melt flow, facilitating the discharge of gas in a molten pool and reducing porosity. The invention combines pulse laser and ultrasonic vibration to realize the control of the melting and dispersion state of filling connection powder and the control of Al4C3The generation of brittle phase and the uniform distribution of SiC particles in the weld joint.
The connecting method of the invention can achieve high-efficiency connection, has the advantages of fast forming, no pollution and small deformation, overcomes the technical difficulty of diffusion welding, prepares powder according to the principle of fused deposition, can improve the wettability of an interface, controls the reaction of the interface, reduces the generation of brittle phases, improves the performance of a connecting joint, overcomes the technical difficulties of brazing, TIG welding, MIG welding and pure laser welding, does not need to be connected in a certain vacuum environment, overcomes the technical difficulty of an electron beam welding machine, and reduces the cost.
Furthermore, the invention can realize partial powder melting and partial non-melting at the position to be connected by controlling the laser energy and the pulse parameters, thereby improving the performance of the joint.
Furthermore, the invention adopts the laser connection technology, the types and the proportion of the filling connection powder can be individually designed according to the needs, different needs can be met, different requirements of connection can be realized, and the connection quality can be improved.
Drawings
FIG. 1 is a schematic structural diagram of a system used in the connection method of the present invention;
FIG. 2 is a schematic view of a powder feed connection;
wherein: 1-coaxial powder feeding head, 2-SiCp/Al composite material workpiece, 3-ultrasonic vibration tool head, 4-ultrasonic generator and 5-laser beam;
FIG. 3 is a metallographic structure diagram of examples 1 to 3 and comparative examples 1 to 2 of the present invention;
FIG. 4 is a graph showing tensile strength curves of examples 1 to 3 of the present invention and comparative examples 1 to 2;
FIG. 5 is a distribution diagram of SiC reinforcing particles before and after joining in example 1 of the present invention.
Detailed Description
The invention provides a connection method of a SiCp/Al composite material, which comprises the following steps: filling connection powder at the to-be-connected position of the SiCp/Al composite material for pulse laser connection, and performing ultrasonic auxiliary vibration on the to-be-connected position in the pulse laser connection process.
In the invention, the SiCp/Al composite material takes Al alloy as a matrix, and SiC particles with certain volume fraction are added into the matrix as a reinforcing phase. The invention has no special requirements on the specific composition of the SiCp/Al composite material, and the SiCp/Al composite material can be prepared by the method well known in the field. In an embodiment of the present invention, the SiCp/Al composite comprises 10% SiCp and 90% 6061Al alloy by volume fraction.
In the present invention, the filler-bond powder preferably includes a matrix component, which is preferably a mixture of SiC powder and Al alloy powder, or a mixture of Al alloy powder and Ni-coated SiC powder, and more preferably a mixture of Al alloy powder and Ni-coated SiC powder. The invention has no special limitation on the dosage of each component in the matrix composition, and preferably determines a proper matrix composition according to the volume fraction of SiC in the SiCp/Al composite matrix, and the determination principle is as follows: the amount of SiC powder or Ni-coated SiC powder in the filler-bond powder is the same as the volume fraction of SiC in the SiCp/Al composite matrix. In the present invention, the filler-linked powder preferably further comprises a modifying component. The modifying component preferably includes Si powder or Ti powder. When the filling and connecting powder further comprises a modifying component, the amount of the modifying component is preferably not more than 10% by mass of the matrix component in the filling and connecting powder, and more preferably 6-9% by mass. In the present invention, the particle size of the filler/binder powder is preferably 20 to 100 μm. In the invention, the components are preferably put into a ball mill for ball milling and mixing, and are dried in vacuum for use. In the present invention, all the raw materials are commercially available products well known in the art unless otherwise specified. In the examples of the present invention, the Ni-coated SiC powder was purchased from shenyang research institute for rare metals under the designation XYFNi 30% SiC 70%. The skilled person can select suitable filling and connecting powder components and proportions according to actual requirements. Specifically, SiC powder and Al alloy powder are components as a matrix; the Ni-coated SiC powder can retain SiC particles with good reinforcing effect, and meanwhile, a layer of Ni is coated outside the SiC particles to effectively prevent the contact between SiC and Al, so that the SiC cannot contact with the Al and a brittle phase is difficult to generate, thereby enhancing the performance of the joint; the Si powder is a product of the reaction (1), the proper addition of the Si powder is beneficial to inhibiting the generation of the reaction (1) and reducing the generation of brittle phases, but after the addition amount of the Si powder exceeds the range, the increase of the content of the Si powder can reduce the mechanical property of the joint; the Ti powder has a high activity ratio, and can displace Si in SiC in the molten pool to form TiC, which is also a reinforcing phase, and although the reinforcing effect is not as good as SiC, it is effective in reducing the brittle phase and improving the joint strength. The reaction of SiC and Al is as follows:
3SiC+4Al→Al4C3+3Si (1)
in the invention, the mode of conveying, filling and connecting powder is preferably synchronous powder feeding; the equipment for conveying the filling connection powder is preferably a coaxial powder feeder, and the conveying amount of the filling connection powder is preferably 5-6 g/min.
Before the pulsed laser connection, the method preferably further comprises removing oil stains on the surface of the SiCp/Al composite material. The invention has no special requirements on the oil stain removal mode and can adopt a mode well known in the field.
In the invention, the peak power of the pulse laser is preferably 1.5-2.5 kW, and in the embodiment of the invention, the peak power is specifically 1.5kW, 2.2kW or 2.5 kW; the pulse frequency is preferably 40-60 Hz, and in the embodiment of the invention, the pulse frequency is specifically 40Hz, 50Hz or 60 Hz; the duty ratio is preferably 50-60%, and in the embodiment of the invention, the duty ratio is specifically 50% or 60%; the scanning speed of the pulse laser is preferably 180-250 mm/min, and the diameter of a light spot is preferably 2-3 mm. The invention adopts the pulse laser for connection, and can obtain a more uniform temperature field by utilizing the smaller heat input of the pulse laser and the cooling effect of the pulse laser in a duty cycle period, reduce the peak temperature of the temperature field and reduce Al4C3Formation of brittle phases. The invention can further improve the performance of the joint by controlling the laser energy and the pulse parameters.
The invention carries out ultrasonic auxiliary vibration on the positions to be connected in the process of pulse laser connection. In the invention, the amplitude of the ultrasound is preferably 10-15 μm, and in the embodiment of the invention, the amplitude is specifically 10 μm or 15 μm; the frequency of the ultrasonic wave is preferably 30-40 kHz, and in the embodiment of the invention, the frequency is specifically 30kHz or 40 kHz; the power of the ultrasonic wave is preferably 80-96W, and in the embodiment of the invention, the power is 80W or 96W. The invention carries out ultrasonic auxiliary vibration on the positions to be connected in the process of pulse laser connection, and can crush brittle phase intermetallic compound Al with certain thickness4C3And uniformly dispersed. In addition, the method also has the effects of improving melt flow, facilitating the discharge of gas in a molten pool and reducing porosity.
The connection method of the present invention will be briefly described below with reference to the accompanying drawings. As shown in figure 1, the invention polishes a prepared SiCp/Al composite workpiece, removes oil stains on the surface by ultrasonic cleaning, puts the workpiece in an alcohol solution for standby, mounts the workpiece on a workbench when laser connection is started, and then performs pulse laser connection. Laser beam 5 generated by the laser is transmitted to the surface of a workpiece through an optical fiber on the light guide arm, the coaxial powder feeding head 1 collects filling connection powder transmitted by the powder feeding device and then transmits the powder to the surface of the workpiece, and ensures that the focal point of the powder and the focal point of the laser are just on the surface of the workpiece at the same time (as shown in figure 2), under the action of the laser, the powder and the surface of the workpiece are simultaneously melted, after the workpiece moves along with the workbench, the laser irradiation area is changed, the melted surface of the workpiece and the melted powder are gradually condensed under the condition of less laser energy, the interatomic combination is achieved, and the connection between the two workpieces is achieved. When in connection, the ultrasonic vibration tool head is in contact with the lower surface of the workpiece below the position of a welding seam, energy is transmitted to the workpiece through the vibration of the ultrasonic vibration tool head 3, intermetallic compounds are crushed, the flowing of a molten pool is increased, the gas in the molten pool is conveniently discharged, and the porosity is reduced.
The following will explain the connection method of the SiCp/Al composite material provided by the present invention in detail with reference to the examples, but they should not be construed as limiting the scope of the present invention.
The SiCp/Al composite materials in the following examples and comparative examples comprise, in volume fraction, 10% SiCp particles and 90% 6061Al alloy.
Example 1
The SiC powder and the 6061Al alloy powder are prepared according to the volume percentage of 10 percent and 90 percent, then the modification component Si powder (the modification component powder accounts for the proportion of the filling and connecting powder matrix component powder) with the mass percentage of 9 percent is added, the mixture is put into a ball mill for ball milling for 2 hours, the powder can be uniformly mixed, and then the mixture is put into a vacuum drying oven for vacuum drying for 1.5 hours. The SiCp/Al composite material workpiece is placed on a workbench, fixed and installed, the prepared powder is taken out and poured into a powder feeder, the laser starting position is adjusted, and pulsed laser connection is carried out by adopting the conditions that the peak power is 2500W, the duty ratio is 50%, the scanning speed is 250mm/min, the pulse frequency is 50Hz, the ultrasonic amplitude is 15 mu m, the ultrasonic frequency is 40kHz, the ultrasonic power is 96W, and the powder feeding amount is 6 g/min.
Example 2
The SiC powder and the 6061Al alloy powder are prepared according to the volume percentage of 10 percent and 90 percent, then modified component Ti powder (the modified component powder accounts for the proportion of the filled and connected powder matrix component powder) with the mass percentage of 6 percent is added, the mixture is put into a ball mill for ball milling for 2 hours, the powder can be uniformly mixed, and then the mixture is put into a vacuum drying oven for vacuum drying for 1.5 hours. The SiCp/Al composite material workpiece is placed on a workbench, fixed and installed, the prepared powder is taken out and poured into a powder feeder, the initial position of laser is adjusted, the adopted peak power is 1500W, the duty ratio is 60%, the scanning speed is 180mm/min, the pulse frequency is 40Hz, the ultrasonic amplitude is 10 μm, the ultrasonic frequency is 30kHz, the ultrasonic power is 80W, and the feeding amount is 5g/min, so that the pulsed laser connection is carried out.
Example 3
The Ni-coated SiC powder and the 6061Al alloy powder are prepared according to the volume percentage of 10 percent and 90 percent, are put into a ball mill for ball milling for 2 hours, so that the powder can be uniformly mixed, and then are put into a vacuum drying oven for vacuum drying for 1.5 hours. The SiCp/Al composite material workpiece is placed on a workbench, fixed and installed, the prepared powder is taken out and poured into a powder feeder, the initial position of the laser is adjusted, and pulsed laser connection is carried out by adopting the mode that the peak power is 2200W, the duty ratio is 50%, the scanning speed is 200mm/min, the pulse frequency is 60Hz, the ultrasonic amplitude is 15 mu m, the ultrasonic frequency is 30kHz, the ultrasonic power is 80W, and the feeding amount is 5 g/min.
Comparative example 1
The Ni-coated SiC powder and the 6061Al alloy powder are prepared according to the volume percentage of 10 percent and 90 percent, are put into a ball mill for ball milling for 2 hours, so that the powder can be uniformly mixed, and then are put into a vacuum drying oven for vacuum drying for 1.5 hours. The SiCp/Al composite material workpiece is placed on a workbench, fixed and installed, the prepared powder is taken out and poured into a powder feeder, the initial position of the laser is adjusted, continuous laser with the peak power of 1320W is adopted, the scanning speed is 200mm/min, the ultrasonic amplitude is 15 mu m, the ultrasonic frequency is 30kHz, the ultrasonic power is 80W, the feeding amount is 5g/min, pulse laser connection is carried out, the comparison with the embodiment 3 is carried out, and the difference of the connection performance of the continuous laser and the pulse laser is researched.
Comparative example 2
The Ni-coated SiC powder and the 6061Al alloy powder are prepared according to the volume percentage of 10 percent and 90 percent, are put into a ball mill for ball milling for 2 hours, so that the powder can be uniformly mixed, and then are put into a vacuum drying oven for vacuum drying for 1.5 hours. The SiCp/Al composite material workpiece is placed on a workbench, fixed and installed, the prepared powder is taken out and poured into a powder feeder, the laser starting position is adjusted, pulsed laser connection is carried out by adopting the mode that the peak power is 2200W rate, the duty ratio is 50%, the scanning speed is 200mm/min, the pulse frequency is 60Hz, and the feeding amount is 5g/min, and the influence of ultrasonic addition on the connection performance is researched by comparing with the embodiment 3.
Performance testing
Metallographic structure observation was performed on the welded joints of examples 1 to 3 and comparative examples 1 to 2, and the results are shown in fig. 3. Wherein (a) is a gold phase diagram of example 1, (b) is a gold phase diagram of example 2, (c) is a gold phase diagram of example 3, (d) is a gold phase diagram of example 4, and (e) is a gold phase diagram of example 5, and in the gold phase diagram, the black, long, needle-like substance is a brittle phase Al4C3As can be seen from the gold phase diagram, brittle phase Al in example 34C3At the minimum, it can be seen from the comparison of (a), (b) and (c) that the addition of Ni-coated SiC is excellent in suppressing the brittle phase Al4C3By comparing (c) and (d), it can be seen that (d) contains a brittle phase Al4C3Is larger than (c), and the brittle phase Al formed in (d)4C3The volume is larger than that in (c), so that the connection effect of the pulse laser is better than that of the continuous laser, and the brittle phase Al in (e) can be seen by comparing (c) and (e)4C3The amount of the generated laser is more than that of (c), and the single volume is more than that of (c), so that the ultrasonic auxiliary pulse laser can reduce the brittle phase Al4C3Amount of formation and control of brittle phase Al4C3Has obvious effect on volume. The thick and big brittle phase directly influences the tensile strength of the welding line in the welding line, and the brittle phase Al4C3The more and the bigger the single volume, the lower the tensile strength, and the tensile strength is one of the important indexes for measuring the connection quality,
the tensile strengths of examples 1 to 3 and comparative examples 1 to 2 are shown in FIG. 4. In fig. 4, (a) is the tensile strength curve of example 1, (b) is the tensile strength curve of example 2, (c) is the tensile strength curve of example 3, (d) is the tensile strength curve of comparative example 1, and (e) is the tensile strength curve of comparative example 2.
As can be seen from fig. 4, the tensile strength of example 3 is the greatest, and the comparison of (a), (b) and (c) can show that the reinforcing effect of the Ni-coated SiC is the best, the comparison of (c) and (d) can show that the tensile strength after the pulsed laser bonding is better than the tensile strength after the continuous laser bonding, and the comparison of (c) and (e) can show that the ultrasonic-assisted addition has a positive effect on the improvement of the tensile strength of the joint. As can be seen from the combination of FIGS. 3 and 4, the Ni-coated SiC powder is coated with a layer of Ni to prevent the contact between SiC and Al and reduce the brittle phase Al4C3While retaining SiC as much as possible, so that the reinforcing phase can exert the reinforcing effect as much as possible, and thus the tensile strength is maximized in example 3.
FIG. 5 is a distribution diagram of SiC reinforcing particles before and after joining in example 1, wherein (a) is a distribution diagram of base material SiC reinforcing particles, and (b) is a distribution diagram of SiC reinforcing particles in a joining melted region.
As can be seen from fig. 5 (a), the matrix SiC reinforcing particles exhibit a layered distribution, and a large number of SiC reinforcing particles are aggregated, and as can be seen from fig. 5 (b), the SiC reinforcing particles in the fused zone after joining exhibit a uniform distribution, and the uniformly distributed SiC reinforcing particles contribute to an improvement in the tensile strength of the joined joint. The distribution rules of examples 2 to 3 are the same, and all show that the SiC reinforced particles in the connected melting region are uniformly distributed.
From the above embodiments, the invention provides a connection method of a SiCp/Al composite material, and the connection method can solve the problem that Al is generated at a weld joint easily by an interface reaction during laser connection of the SiCp/Al composite material4C3Brittle needle phase, aggregation of SiC reinforcing particles and poor weldability.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A connection method of SiCp/Al composite material is characterized by comprising the following steps: filling connection powder at the to-be-connected position of the SiCp/Al composite material for pulse laser connection, and performing ultrasonic auxiliary vibration on the to-be-connected position in the pulse laser connection process.
2. The connecting method according to claim 1, wherein the pulsed laser has a peak power of 1.5 to 2.5kW, a pulse frequency of 40 to 60Hz, and a duty ratio of 50 to 60%.
3. The joining method according to claim 1 or 2, wherein the scanning speed of the pulse laser is 180 to 250mm/min and the spot diameter is 2 to 3 mm.
4. The connecting method according to claim 1, wherein the amplitude of the ultrasonic wave is 10 to 15 μm, the frequency of the ultrasonic wave is 30 to 40kHz, and the power of the ultrasonic wave is 80 to 96W.
5. The joining method according to claim 1, wherein the filler-joined powder includes a matrix component that is a mixture of a SiC powder and an Al alloy powder, or a mixture of an Al alloy powder and a Ni-clad SiC powder.
6. The joining method of claim 5 wherein the fill-join powder further comprises a modifying component comprising Si or Ti powder.
7. The joining method according to claim 6, wherein the modifying component is used in an amount of not more than 10% by mass of the matrix component in the filled joining powder.
8. The joining method according to claim 1, wherein the mode of feeding the filling joining powder is a simultaneous powder feeding.
9. The joining method according to claim 8, wherein the apparatus for feeding the filler joining powder is a coaxial powder feeder, and the feeding amount of the filler joining powder is 5 to 6 g/min.
10. The method of claim 1 further comprising degreasing the surface of said SiCp/Al composite prior to said joining.
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| CN112222624A (en) * | 2020-09-07 | 2021-01-15 | 中国科学院上海光学精密机械研究所 | Laser-arc hybrid welding method for SiC particle reinforced aluminum matrix composite material |
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| CN112222624A (en) * | 2020-09-07 | 2021-01-15 | 中国科学院上海光学精密机械研究所 | Laser-arc hybrid welding method for SiC particle reinforced aluminum matrix composite material |
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| CN112643050B (en) * | 2020-12-07 | 2023-02-17 | 西安航天发动机有限公司 | Laser additive manufacturing method of particle-reinforced metal matrix composite part |
| CN113146042A (en) * | 2021-03-12 | 2021-07-23 | 中国工程物理研究院材料研究所 | Laser welding B capable of effectively reducing welding holes4Method for producing C/Al |
| CN113146043A (en) * | 2021-04-27 | 2021-07-23 | 华中科技大学 | Synchronous powder feeding and light penetration welding method and system |
| CN113878236A (en) * | 2021-10-20 | 2022-01-04 | 浙江安防职业技术学院 | Method for synchronously welding T-shaped dissimilar metal joint by three laser beams |
| CN113878236B (en) * | 2021-10-20 | 2023-12-19 | 浙江安防职业技术学院 | Method for synchronously welding T-shaped dissimilar metal joint by three laser beams |
| CN114147353A (en) * | 2021-12-01 | 2022-03-08 | 华东交通大学 | Laser powder filling welding method for SiCp/Al-based composite material |
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