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Laser additive repair alloy powder and method of laser welding blast hole of cast aluminum radiator

A laser welding and laser additive technology, applied in the field of material processing, can solve the problems that affect the sealing and performance of aluminum castings, easily generate shrinkage porosity and shrinkage, and scrap the parts with blasting holes, so as to overcome the phenomenon of poor fusion. , the effect of grain thinning and fast repair speed

Inactive Publication Date: 2019-06-14
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex casting process control process, cast aluminum alloys are prone to shrinkage porosity and shrinkage cavities
When laser welding is used to form parts, it is easy to produce blast holes, which affects the sealing and performance of cast aluminum parts
Under normal circumstances, the parts with blast holes will be scrapped, resulting in great waste

Method used

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  • Laser additive repair alloy powder and method of laser welding blast hole of cast aluminum radiator
  • Laser additive repair alloy powder and method of laser welding blast hole of cast aluminum radiator
  • Laser additive repair alloy powder and method of laser welding blast hole of cast aluminum radiator

Examples

Experimental program
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Effect test

Embodiment 1

[0049] A laser additive repair process for laser welding and blasting of cast aluminum (ZL101) radiators, which is implemented by special alloy powder for laser welding and blasting of cast aluminum (ZL101) radiators, is carried out in sequence according to the following process steps:

[0050] The specific components in the alloy powder are 9.0wt.% Si, 0.2wt.% Mg, 0.8wt.% Nd, 0.1wt.% Mn, 0.05wt.% Cu, 0.25wt.% Fe, 0.05wt.% Ni, 0.1wt .% Zn, 0.02wt.% Sn, the balance is Al.

[0051] a. Classification treatment: measure the appearance size of the laser welding blast hole of the cast aluminum radiator, and divide it into two categories according to the diameter: less than 3mm and more than 3mm.

[0052] b. Cleaning before repair: Use a file to clean up the splash around the blast hole, use a clean cotton swab to dip an appropriate amount of acetone (regular concentration is enough) to wipe and clean the laser welding blast hole and its surroundings, and remove welding dust that may...

Embodiment 2

[0065] A laser additive repair process for laser welding and blasting of cast aluminum (ZL101) radiators, which is implemented by special alloy powder for laser welding and blasting of cast aluminum (ZL101) radiators, is carried out in sequence according to the following process steps:

[0066] The specific components in the alloy powder are 11.0wt.% Si, 0.5wt.% Mg, 0.4wt.% Nd, 0.05wt.% Mn, 0.03wt.% Cu, 0.20wt.% Fe, 0.03wt.% Ni, 0.05wt .% Zn, 0.01wt.% Sn, the balance is Al.

[0067] a. Classification treatment: measure the appearance size of the laser welding blast hole of the cast aluminum radiator, and divide it into two categories according to the diameter: less than 3mm and more than 3mm.

[0068] b. Cleaning before repair: Use a file to clean up the splash around the blast hole, use a clean cotton swab to dip an appropriate amount of acetone (regular concentration is enough) to wipe and clean the laser welding blast hole and its surroundings, and remove welding dust that ...

Embodiment 3

[0081] A laser additive repair process for laser welding and blasting of cast aluminum (ZL101) radiators, which is implemented by special alloy powder for laser welding and blasting of cast aluminum (ZL101) radiators, is carried out in sequence according to the following process steps:

[0082] The specific components in the alloy powder are 10.0wt.% Si, 0.3wt.% Mg, 0.5wt.% Nd, 0.01wt.% Mn, 0.01wt.% Cu, 0.10wt.% Fe, 0.02wt.% Ni, 0.08wt .% Zn, 0.01wt.% Sn, the balance is Al.

[0083] a. Classification treatment: measure the appearance size of the laser welding blast hole of the cast aluminum radiator, and divide it into two categories according to the diameter: less than 3mm and more than 3mm.

[0084] b. Cleaning before repair: Use a file to clean up the splash around the blast hole, use a clean cotton swab to dip an appropriate amount of acetone (regular concentration is enough) to wipe and clean the laser welding blast hole and its surroundings, and remove welding dust that ...

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Abstract

The invention relates to laser additive repair alloy powder and method of a laser welding blast hole of a cast aluminum radiator. The alloy powder mainly comprises AlSiMgMnCuFeNiZnSnNd. The alloy powder is prepared by adopting an air atomization method, and powder particles are in a spherical shape, and the particle size is 15-65[mu]m. Firstly, tensile strength and elongation are increased, and comprehensive mechanical properties are improved; secondly, higher repair speed can be provided, the generation of refractory alumina in repair welding repair process is reduced, and the burning loss ofalloy elements is reduced, so that the repair quality is improved; thirdly, a laser can provide higher energy density, and poor fusion phenomenon caused by good thermal conductivity of aluminum alloyis overcome; fourthly, compared with a traditional repair welding repair method, the laser additive repair method has fewer process parameters affecting repair quality, and the probability of secondary defects such as cracks and pores due to improper operation or improper process parameters can be reduced; and fifthly, compared with the traditional repair welding repair method, the laser additiverepair method has the characteristics of good repair quality, high applicability to the size of the blast hole at the repair place and the like.

Description

Technical field: [0001] The patent of the present invention relates to the repair of laser welding blast holes (or casting shrinkage holes) of cast aluminum materials in the field of automobiles and aviation, especially radiators, and belongs to the technical field of material processing. Background technique: [0002] Due to the advantages of high strength, high toughness, wear resistance and corrosion resistance of cast aluminum alloy, a large number of cast aluminum alloys are used instead of forgings to improve the overall rigidity of the structure. With the advancement of casting technology, the casting process can achieve casting instead of forging, which can effectively reduce production costs. In addition, the aluminum alloy material can reduce the amount of steel used, greatly reduce the weight of the vehicle body, reduce energy consumption, and reduce the discharge of pollutants. However, due to the complex casting process control process, cast aluminum alloy is p...

Claims

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Application Information

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IPC IPC(8): B23K26/342
Inventor 徐国建井志成张国瑜苏允海郑文涛曲迎东王蔚于宝义
Owner SHENYANG POLYTECHNIC UNIV
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