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Brazing method for SiC particle-reinforced aluminum matrix composite

A particle-reinforced aluminum and composite material technology, applied in the direction of welding/cutting media/materials, welding media, welding equipment, etc., can solve problems such as poor surface bonding force, improve bonding force, prevent deformation, and improve weld bonding force Effect

Inactive Publication Date: 2017-05-31
天长市通联焊业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a brazing method for SiC particle reinforced aluminum matrix composite materials, which uses aluminum silicon magnesium brazing filler metal in combination with a vacuum brazing method, overcomes the disadvantage of poor surface bonding force of SiC particle reinforced aluminum matrix composite materials, and improves the weld seam Bonding force, shear strength up to 65.9MPa, simple process, easy to operate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A SiC particle-reinforced aluminum-based composite material brazing method includes the following steps:

[0023] S1. Put the SiC particle-reinforced aluminum-based composite material into water, perform grinding, ultrasonic cleaning, and dry at room temperature under vacuum to obtain a pre-welded base material;

[0024] S2. Surface polishing, washing and drying the aluminum-silicon-magnesium solder to obtain soldering solder;

[0025] S3. Exhaust the vacuum brazing furnace to vacuum, transfer the pre-welded base body and the soldering brazing filler metal into the vacuum brazing furnace;

[0026] S4: Raise the vacuum brazing furnace to 590°C for 30 minutes, apply a constant pressure to the welded joint during the brazing process, and cool down with the furnace to complete the welding to obtain the weldment.

Embodiment 2

[0028] A SiC particle-reinforced aluminum-based composite material brazing method includes the following steps:

[0029] S1. Put the SiC particle-reinforced aluminum-based composite material into water, perform grinding, ultrasonic cleaning, and dry at room temperature under vacuum to obtain a pre-welded base material;

[0030] S2. Surface polishing, washing and drying the aluminum-silicon-magnesium solder to obtain soldering solder;

[0031] S3. Exhaust the vacuum brazing furnace to vacuum, transfer the pre-welded base body and the soldering brazing filler metal into the vacuum brazing furnace;

[0032] S4: Raise the vacuum brazing furnace to 580°C for 35 minutes, apply a constant pressure to the welded joint during the brazing process, and cool down with the furnace to complete the welding to obtain the weldment;

[0033] Al-Si-Mg solder components include Si 12%, Mg 1.5%, Ti 4%, Al 82.5% by weight percentage.

Embodiment 3

[0035] A SiC particle-reinforced aluminum-based composite material brazing method includes the following steps:

[0036] S1. Put the SiC particle-reinforced aluminum-based composite material into water, perform grinding, ultrasonically wash in an acetone solution for 20 minutes, and dry at room temperature under vacuum to obtain a pre-welded base material;

[0037] S2. Polish the surface of the aluminum-silicon-magnesium solder with sandpaper, wash with acetone, and dry to obtain soldering solder;

[0038] S3. Exhaust the vacuum brazing furnace to vacuum, transfer the pre-welded base body and the soldering brazing filler metal into the vacuum brazing furnace;

[0039] S4: Raise the vacuum brazing furnace to 600°C, keep it for 25min, apply a constant pressure to the welding joint during the brazing process, and cool down with the furnace to complete the welding to obtain the weldment;

[0040] In S2, the aluminum-silicon-magnesium solder components include Si 10%, Mg 2%, Ti 3%, and Al 85...

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Abstract

The invention discloses a brazing method for a SiC particle-reinforced aluminum matrix composite. The brazing method comprises the following steps that S1, the SiC particle-reinforced aluminum matrix composite is put into water, grinding and ultrasonic washing are conducted, room temperature drying under the vacuum condition is conducted, and a pre-welding base material is obtained; S2, surface grinding and washing are conducted on aluminum-silicon-magnesium brazing filter metal, and welding brazing filter metal is obtained after drying; S3, a vacuum brazing furnace is vacuumized, and the pre-welding base body and the welding brazing filter metal are assembled and then put into the vacuum brazing furnace; and S4, the vacuum brazing furnace is heated to 580-600 DEG C, the temperature is kept for 25-35 min, cooling along with the furnace is conducted, welding is completed, and the welding piece is obtained. According to the brazing method, for the characteristic of the SiC particle-reinforced aluminum matrix composite, by the adoption of the vacuum brazing welding manner, the aluminum-silicon-magnesium brazing filter metal is used, the Ti active ingredient is added, the contact surface tension of the flux and the composite is improved, and the weld seam bonding force is improved. The brazing method has the beneficial effects of being excellent in shear strength, simple in process and easy to implement.

Description

Technical field [0001] The invention relates to the technical field of welding of SiC particle-reinforced aluminum-based composite materials, in particular to a brazing method for SiC particle-reinforced aluminum-based composite materials. Background technique [0002] SiCp / Al composite material is a kind of lightweight composite material that can meet the requirements of special physical properties. It has excellent properties such as high specific strength, high specific stiffness, and high elastic modulus. It is widely used in aerospace, military weapons, automotive electronics, sports equipment, etc. field. The huge difference in the physical and chemical properties of SiCp / Al's matrix and reinforcement phase makes its connection characteristics significantly different from the matrix metal materials and ceramic materials, and its welding performance is very poor, making SiCp / Al-MMCs widely used in many fields. restricted. Therefore, the development of a welding method suit...

Claims

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Application Information

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IPC IPC(8): B23K1/008B23K1/20B23K35/28
CPCB23K1/008B23K1/20B23K1/206B23K35/286
Inventor 卢齐元
Owner 天长市通联焊业有限公司
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