Method for rapidly and smoothly removing magnesium alloy micro-arc oxide film layer

A micro-arc oxidation and magnesium alloy technology, which is applied in laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problems of poor magnesium alloy effect and achieve the effects of ensuring surface quality, saving energy consumption, and avoiding ablation

Active Publication Date: 2020-09-11
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing laser cleaning technology has poor effect on magnesium alloy and is difficult to meet the requirements, the present invention provides a method for quickly and cleanly removing the micro-arc oxidation film layer of magnesium alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The test object is a micro-arc oxidation film with a thickness of 15 Magnesium alloy samples with a surface roughness of 1.035 . The laser wavelength is 1.064 The nano-laser laser removes the film layer, the laser output power is 18W, the frequency is 50KHz, the laser beam scanning method is one horizontal scanning superimposed one longitudinal scanning, the scanning line spacing is 0.05mm, and the scanning speed is 1000mm / s.

[0019] Use a multimeter to measure the resistance between any two points in the film removal area to be 0 , indicating that the micro-arc oxidation film layer has been removed. The Ra of this area measured by TR200 surface roughness meter is 1.702 .

Embodiment 2

[0021] The test object is a micro-arc oxidation film with a thickness of 15 Magnesium alloy samples with a surface roughness of 1.012 . The laser wavelength is 1.064 The nano-laser laser removes the film layer, the laser output power is 9W, the frequency is 50KHz, the laser beam scanning method is one horizontal scanning superimposed one longitudinal scanning, the scanning line spacing is 0.05mm, and the scanning speed is 1500mm / s.

[0022] Use a multimeter to measure the resistance between any two points in the film removal area to be 0 , indicating that the micro-arc oxidation film layer has been removed. The Ra of this area measured by TR200 surface roughness meter is 2.220 .

Embodiment 3

[0024] The test object is a micro-arc oxidation film with a thickness of 27 The magnesium alloy sample, the surface roughness is 1.573 . The laser wavelength is 1.064 The nano-laser laser removes the film layer, the laser output power is 6W, the frequency is 30KHz, the laser beam scanning method is one horizontal scanning and one longitudinal scanning, the scanning line spacing is 0.05mm, and the scanning speed is 510mm / s.

[0025] Use a multimeter to measure the resistance between any two points in the film removal area to be 0 , indicating that the micro-arc oxidation film layer has been removed. The Ra of this area measured by TR200 surface roughness meter is 1.454 .

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Abstract

Provided is a method for rapidly and smoothly removing a magnesium alloy micro-arc oxide film layer. A nanometer laser device with a laser wavelength of 1.064 is adopted to perform laser removal on the magnesium alloy micro-arc oxide film layer, a laser output power is 6-18 W, a laser frequency is 25-100 KHz, a scanning mode is repeated laser beam scanning of the micro-arc oxide film layer, scanning directions of every two subsequent times of scanning are perpendicular to each other, a trace interval is 0.05-0.09 mm, and a scanning speed is 510-2000 mm/s. By means of the method, a laser outputpower is reduced; and by setting the laser scanning mode, trace interval and scanning speed, the micro-arc oxide film layer can be sufficiently removed, a magnesium alloy surface can be prevented from ablation, the quality of the magnesium surface subjected to laser removal is ensured, the film layer removal speed is high, film layer removal is thorough, the roughness of the magnesium alloy surface subjected to film layer removal does not exceed 3.2, and the requirement for removal of the magnesium alloy micro-arc oxide film layer is met.

Description

technical field [0001] The invention relates to the field of magnesium alloy oxidation film removal methods, in particular to a method for rapidly and cleanly removing the magnesium alloy micro-arc oxidation film layer. Background technique [0002] Magnesium has the advantages of low density, high specific strength, high specific stiffness, and electromagnetic shielding performance, and has broad application prospects in the fields of military industry, machinery, electronics, and medical equipment. However, magnesium and its alloys are extremely prone to corrosion. In special environments (such as seawater, organic / inorganic salt solutions, organic / inorganic acid-base solutions, etc.), magnesium alloys will react chemically or electrochemically with the surrounding medium. [0003] In order to improve the corrosion resistance of magnesium alloys, micro-arc oxidation is often used for surface treatment in the industry to form a high-hardness and dense ceramic film on the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/36B23K26/082B23K26/70
CPCB23K26/36B23K26/082B23K26/702
Inventor 石绪忠周洋王腾达
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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