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Brazing method and solder preparation method for high-volume-fraction SiCp/Al composite

A high volume fraction, composite material technology, applied in the direction of welding/cutting media/materials, welding equipment, welding media, etc., can solve the problems of poor wettability, low air tightness, low strength of brazed joints, etc., and achieve joint strength High, well-integrated interface, tight connection effect

Inactive Publication Date: 2017-06-13
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high volume fraction SiCp / Al composite material in order to solve the problems of poor wettability of the high volume fraction SiCp / Al composite material and low brazed joint strength and low air tightness under the existing welding process Brazing method and solder preparation method

Method used

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  • Brazing method and solder preparation method for high-volume-fraction SiCp/Al composite
  • Brazing method and solder preparation method for high-volume-fraction SiCp/Al composite
  • Brazing method and solder preparation method for high-volume-fraction SiCp/Al composite

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Embodiment 1

[0024] A method for preparing brazing material of high volume fraction SiCp / Al composite material, comprising the steps of:

[0025] The first step, mixing materials: according to the mass ratio of 26.7%Cu, 5.25%Si, 1.5%Mg and the balance of Al, the raw materials of pure Al, pure Cu, Al-20Si, Al-50Mg are mixed, and then pure Al, The Cu element and the Al-20Si master alloy are placed in the graphite crucible of the high vacuum induction melting furnace, and the Al-50Mg master alloy is placed in the stainless steel mold, and the stainless steel mold is evacuated to 1×10 -3 Pa~3×10 -3 Pa, and then filled with high-purity argon until the pressure in the stainless steel mold is 0MPa;

[0026] The second step is to prepare the brazing material blank: turn on the induction heating power supply, preheat the graphite crucible to 300 ° C ~ 400 ° C, and then heat the graphite crucible to 1500 ° C ~ 1600 ° C within 10 minutes to completely melt the metal raw materials in the graphite cru...

Embodiment 2

[0036] A method for preparing brazing material of high volume fraction SiCp / Al composite material, comprising the steps of:

[0037] The first step, mixing materials: according to the mass ratio of 20.0%Cu, 6.0%Si, 1.5%Mg and the balance of Al, the raw materials of pure Al, pure Cu, Al-20Si, Al-50Mg are mixed, and then pure Al, The Cu element and the Al-20Si master alloy are placed in the graphite crucible of the high vacuum induction melting furnace, and the Al-50Mg master alloy is placed in the stainless steel mold, and the stainless steel mold is evacuated to 1×10 -3 Pa~3×10 -3 Pa, and then filled with high-purity argon until the pressure in the stainless steel mold is 0MPa;

[0038] The second step is to prepare the brazing material blank: turn on the induction heating power supply, preheat the graphite crucible to 300 ° C ~ 400 ° C, and then heat the graphite crucible to 1500 ° C ~ 1600 ° C within 10 minutes to completely melt the metal raw materials in the graphite cruc...

Embodiment 3

[0048] A method for preparing brazing material of high volume fraction SiCp / Al composite material, comprising the steps of:

[0049] The first step, mixing materials: according to the mass ratio of 28% Cu, 6% Si, 2% Mg and the balance Al, the raw materials of pure Al, pure Cu, Al-20Si, Al-50Mg are mixed, and then pure Al, The Cu element and the Al-20Si master alloy are placed in the graphite crucible of the high vacuum induction melting furnace, and the Al-50Mg master alloy is placed in the stainless steel mold, and the stainless steel mold is evacuated to 1×10 -3 Pa~3×10 -3 Pa, and then filled with high-purity argon until the pressure in the stainless steel mold is 0MPa;

[0050] The second step is to prepare the brazing material blank, turn on the induction heating power supply, preheat the graphite crucible to 300 ℃ ~ 400 ℃, and then heat the graphite crucible to 1500 ℃ ~ 1600 ℃ within 10 minutes to completely melt the metal raw materials in the graphite crucible , and ke...

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Abstract

The invention relates to a brazing method and a solder preparation method for a high-volume-fraction SiCp / Al composite. A solder is an Al-Cu-Si-Mg quenched foil-like solder, the solder preparation method comprises the steps as follows: 1, material mixing; 2, preparation of a solder blank; 3, refinement of the solder into an alloy column; 4, quick melt-spinning of the alloy column for preparation of the quenched foil-like solder. The brazing method of the high-volume-fraction SiCp / Al composite comprises the steps as follows: 1, the surface of the SiCp / Al composite is pretreated; 2, a Ti active layer is formed on the pretreated surface of the SiCp / Al composite through magnetron sputtering; 3, a to-be-brazed surface is pretreated; 4, vacuum brazing is performed. The quenched foil-like solder and the Ti active layer can be subjected to a metallurgical reaction to form a compact reaction layer, brazing seams are well formed, joints are higher in shear strength and air tightness, and the brazing method can be widely applied to the welding field of the high-volume-fraction SiCp / Al composite.

Description

technical field [0001] The invention belongs to the welding field of metal matrix composite materials, and relates to a brazing method and a brazing material preparation method of high volume fraction SiCp / Al composite materials. Background technique [0002] High volume fraction (55-75%) silicon carbide particle reinforced aluminum matrix composite (SiCp / Al) is one of the most promising materials among new materials, because of its high specific strength, high specific stiffness, high thermal conductivity Excellent characteristics such as low density and low thermal expansion coefficient have important application prospects in key components such as electronic packaging and aerospace, and become an ideal choice for replacing traditional electronic packaging materials such as Kovar, W / Cu and Mo / Cu, but due to high The introduction of the proportional SiC ceramic phase results in poor weldability of the aluminum matrix composite material, which makes its welding process quite...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/40B23K1/20B23K1/008
CPCB23K1/008B23K1/20B23K1/206B23K35/286B23K35/40
Inventor 王鹏徐冬霞王东斌牛济泰
Owner HENAN POLYTECHNIC UNIV
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