Laser powder filling welding method for SiCp/Al-based composite material

A composite material and welding method technology, which is applied to laser welding equipment, welding equipment, and drying solid materials without heating, etc., can solve the problems of uneven particle distribution, reduce weld quality, and enhance phase aggregation, etc., to achieve simple operation, Ease of industrialization and the effect of improving the absorption rate

Pending Publication Date: 2022-03-08
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are a series of problems in the welding of metal matrix composites using the principle of fusion welding, such as brittle intermetallic compounds, some small holes, poor fusion, uneven particle distribution, reinforcement phase aggregation, etc. Defects that reduce weld quality

Method used

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  • Laser powder filling welding method for SiCp/Al-based composite material
  • Laser powder filling welding method for SiCp/Al-based composite material
  • Laser powder filling welding method for SiCp/Al-based composite material

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Experimental program
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Effect test

Embodiment 1

[0029] In this embodiment, the SiCp / Al-based composite material laser powder filling welding method, the specific steps are as follows:

[0030] (1) Make a 90° bevel on the welding part of the 12vol.% SiC / 6061Al composite material (in the composite material, the volume percentage of SiC is 12%, and the rest is 6061 aluminum alloy), remove the scale, sandblast and roughen it, and clean it , Dry for later use.

[0031] (2) Sieving the alloy powders Ti and Si, and the particle size of the powder is 140-300 mesh. The atomic percentages of Ti and Si in the alloy powder are: 63.16% Ti, 36.84% Si, and the purity of each component is greater than or equal to 99.9wt.%. Alloy powders were configured according to the above proportions, and then ball milled in a planetary ball mill for 2 hours at a milling speed of 200 rpm, and then dried in a vacuum oven at 60°C for 2 hours.

[0032] (3) After installing the pre-treated base metal, perform laser welding, and use the coaxial powder feed...

Embodiment 2

[0035] In this embodiment, the SiCp / Al-based composite material laser powder filling welding method, the specific steps are as follows:

[0036] (1) Make a 90° bevel on the welded part of the 12vol.% SiC / 6061Al composite material, remove scale, sandblast and roughen it, clean and dry it for later use.

[0037](2) Sieving the alloy powders Ti and Si, and the particle size of the powder is 140-300 mesh. The atomic percentages of Ti and Si in the alloy powder are: 77.42% Ti, 22.58% Si, and the purity of each component is greater than or equal to 99.9wt.%. Configure the alloy powder according to the above ratio, and then ball mill it in a planetary ball mill for 2 hours at a milling speed of 200 rpm, and then dry it in a vacuum oven at 60°C for 2 hours;

[0038] (3) After installing the pre-treated base metal, perform laser welding, and use the coaxial powder feeding device to blow the alloy powder obtained in step (2) to the groove of the SiCp / Al composite material surface for l...

Embodiment 3

[0041] In this embodiment, the SiCp / Al-based composite material laser powder filling welding method, the specific steps are as follows:

[0042] (1) Make a 90° bevel on the welded part of the 12vol.% SiC / 6061Al composite material, remove scale, sandblast and roughen it, clean and dry it for later use.

[0043] (2) Sieving the alloy powders Ti and Si, and the particle size of the powder is 140-300 mesh. The atomic percentages of Ti and Si in the alloy powder are: 83.72% Ti, 16.28% Si, and the purity of each component is greater than or equal to 99.9wt.%. Configure the alloy powder according to the above ratio, and then ball mill it in a planetary ball mill for 2 hours at a milling speed of 200 rpm, and then dry it in a vacuum oven at 60°C for 2 hours;

[0044] (3) After installing the pre-treated base metal, perform laser welding, and use the coaxial powder feeding device to blow the alloy powder obtained in step (2) to the groove of the SiCp / Al composite material surface for ...

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Abstract

The invention relates to the technical field of laser welding, in particular to a SiCp / Al-based composite material laser powder filling welding method. According to the method, connection of the SiCp / Al-based composite material is achieved through laser powder filling welding, Ti powder and Si powder with different contents are filled during laser welding of the SiCp / Al-based composite material, the microstructure and structural components of a welding seam are changed, generation of a brittle compound Al4C3 and generation of holes and cracks in the welding seam are effectively inhibited, and effective connection of the SiCp / Al-based composite material is achieved. According to the method, generation of a brittle compound Al4C3 and generation of holes and cracks in a welding seam are effectively inhibited by adjusting the welding process to change the welding power, the welding speed, the content of the filling powder and the like, laser welding of the SiCp / Al-based composite material is achieved, and the method is simple and effective.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a laser powder-filled welding method for SiCp / Al-based composite materials. Background technique [0002] Aluminum as a matrix has many advantages in making composite materials, such as: light weight, relatively small density, good plasticity, etc., and the processing of aluminum-based materials is relatively easy, and the technology is easy to master. The processed aluminum matrix composite material has high specific strength, excellent high temperature performance, fatigue resistance, good wear resistance, excellent damping property, and low thermal expansion coefficient. At present, metal matrix composites are divided into three types of metal matrix composites: particle reinforcement, fiber reinforcement and whisker reinforcement according to the type of reinforcement. Silicon carbide particle reinforced aluminum matrix composite (SiCp / Al) is a discontinuous (Discontin...

Claims

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Application Information

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IPC IPC(8): B23K26/21B23K26/16B23K26/70F26B5/04
CPCB23K26/21B23K26/16B23K26/702F26B5/04
Inventor 张淑芳赵龙志程梓威赵明娟焦海涛胡勇唐延川刘德佳
Owner EAST CHINA JIAOTONG UNIVERSITY
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