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Aluminum alloy laser preprocessing and anti-corrosion reinforcing process

A laser pretreatment, aluminum alloy technology, applied in the field of laser applications, to achieve the effect of improved test strength, good processing quality and simple operation

Active Publication Date: 2019-01-04
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For high-temperature short-time pre-precipitation treatment, there are many defects in furnace temperature treatment, such as temperature measurement and temperature control.

Method used

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  • Aluminum alloy laser preprocessing and anti-corrosion reinforcing process
  • Aluminum alloy laser preprocessing and anti-corrosion reinforcing process
  • Aluminum alloy laser preprocessing and anti-corrosion reinforcing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The 7xxx series alloy is Al-6Zn-2.9Mg-1.6Cu and polished to a metallic luster with 2000 sandpaper; the box-type resistance furnace is heated to 470˚C, and the alloy is put into the furnace after the temperature is stable, and the aluminum alloy is solid-soluted Treatment, solid solution treatment time 1h; during the solid solution process, the aluminum alloy is protected by argon gas. The aluminum alloy after solid solution treatment is quickly taken out of the box-type resistance furnace and placed on the laser workbench. The laser used in the laser workbench is a semiconductor laser. The workbench drives the aluminum alloy to sweep the laser spot across the surface of the alloy. The parameters are: 1100, 2mm / s, the defocus of the laser on the workpiece surface is 35mm, and the aluminum alloy is protected by argon gas during the laser processing. After the laser scans the alloy, it is quickly taken out and quenched; quenching uses deionized water at a temperature of 0-...

Embodiment 2

[0036]The 7xxx series alloy is Al-6Zn-2.9Mg-1.6Cu and polished to a metallic luster with 2000 sandpaper; the box-type resistance furnace is heated to 450˚C, and the alloy is put into the furnace after the temperature is stable, and the aluminum alloy is solid-soluted The solid solution treatment time is 6h; the aluminum alloy is protected by argon gas during the solid solution process. The aluminum alloy after solid solution treatment is quickly taken out of the box-type resistance furnace and placed on the laser workbench. The laser used in the laser workbench is a semiconductor laser. The workbench drives the aluminum alloy to sweep the laser spot across the surface of the alloy. The parameters are: 1350W, 1mm / s, the defocus of the laser on the workpiece surface is 30mm, and the aluminum alloy is protected by argon gas during the laser processing. After the laser scans the alloy, it is quickly taken out and quenched; quenching uses deionized water at a temperature of 0-5˚C, ...

Embodiment 3

[0039] The 7xxx alloy is Al-6Zn-2.9Mg-1.6Cu and polished to a metallic luster with No. 2000 sandpaper; the box-type resistance furnace is equipped with a heat preservation container, which is a square container made of aluminum silicate fiberboard, and the top of the container is not silicon Acid aluminum fiberboard is ultra-clear glass with a light transmittance greater than 93%. Put the container in a box-type resistance furnace and heat it up to 470˚C with the furnace. After the temperature in the container is consistent with the furnace temperature, put the aluminum alloy into the box In the heat preservation container in the resistance furnace, solid solution treatment is carried out, and the solid solution treatment time is 1 hour; the aluminum alloy is protected by argon gas during the solid solution process. Take the heat preservation container containing aluminum alloy out of the box-type resistance furnace after solid solution treatment, and place it on the laser work...

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Abstract

The invention relates to an aluminum alloy laser preprocessing and anti-corrosion reinforcing process. Aluminum alloy in the process is suitable for a thermal-treatable reinforcing type aluminum alloysecond series (Al-Cu-Mg), sixth series (Al-Mg-Si) and seventh series (Al-Zn-Mg-Cu); the aluminum alloy is ground by grinding paper to have metal color and luster and subjected to solid melting treatment; the aluminum alloy subjected to the solid melting treatment is placed on a laser working table, the alloy is driven by the working table so that laser spots can be made to scan the surface of thealloy, and the alloy is rapidly taken out and quenched after the laser scans the alloy; after the aluminum alloy is cooled, the aluminum alloy is placed into a blast air oven and then air-cooled, andthe anti-corrosion reinforced aluminum alloy is obtained. The method has the advantages of being easy to operate, good in processing quality, high in processing efficiency, capable of saving production cost and the like. Through tests, the strength of the obtained aluminum alloy is improved, and the aluminum alloy is high in corrosion resistance.

Description

technical field [0001] The invention relates to the field of laser applications, in particular to a laser pretreatment and corrosion resistance strengthening process for aluminum alloys. Background technique [0002] Aluminum alloy heat treatment mainly includes solution quenching, aging and other processes. Its purpose is to optimize the structure of intragranular precipitated phase, grain boundary precipitated phase and intergranular precipitated zone through heat treatment. Chen Kanghua and others added short-term high-temperature pre-precipitation treatment after solution treatment. After aging, the mechanical properties and corrosion resistance of the alloy were similar to those of regression re-aging, and the process flow was greatly reduced. However, for high-temperature and short-time pre-precipitation treatment, there are many defects in furnace temperature treatment, such as temperature measurement and temperature control. Laser heat treatment has the advantages ...

Claims

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Application Information

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IPC IPC(8): C22F1/04C22F1/02
CPCC22F1/02C22F1/04
Inventor 苏睿明刘桐曲迎东李荣德尤俊华白彦华
Owner SHENYANG POLYTECHNIC UNIV
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