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Al-Mg alloy surface oxidation film laser cleaning technology

A technology of laser cleaning and surface oxidation, used in cleaning methods and utensils, chemical instruments and methods, etc., can solve problems such as pollution and high labor intensity

Inactive Publication Date: 2018-12-21
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention provides a laser cleaning process of oxide film on the surface of Al-Mg alloy, which can replace the traditional mechanical grinding process of aluminum alloy before welding, and solve the labor of grinding aluminum alloy before welding and adopting conventional mechanical grinding. Intensive, serious pollution problems, while improving cleaning efficiency, to achieve "green" cleaning

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  • Al-Mg alloy surface oxidation film laser cleaning technology
  • Al-Mg alloy surface oxidation film laser cleaning technology
  • Al-Mg alloy surface oxidation film laser cleaning technology

Examples

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Embodiment Construction

[0031] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] For the surface of Al-Mg-Zn aluminum alloy material, different laser pulse energy (Ep) and / or different number of pulse frequency (NOP) are used for cleaning;

[0033] Recording the surface morphology of laser-cleaned aluminum alloys using digital cameras, optical microscopy and scanning electron microscopy (SEM);

[0034] Use energy dispersive X-ray spectrometer (EDX) to evaluate the composition of the cleaned surface to determine the damage and melting of different combinations to the substrate to find the process cleaning threshold and select the appropriate process parameters for large area cleaning.

[0035] Determine the basic range of test parameters:

[0036] Laser pulse energy (Ep) selection 4-32mJ

[0037] Different number of pulse frequency (NOP) 12-28KHz

[0038] Working distance from workpiece surface: 100 mm

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Abstract

The invention relates to an Al-Mg alloy surface oxidation film laser cleaning technology. The laser cleaning technology comprises the step that the Al-Mg alloy surface is cleaned with a nanosecond pulse fiber laser, and in the cleaning parameters, the pulse energy is 16-24 mJ, and the pulse frequency is 18-28 KHz. By adopting the cleaning technology, substrate surface impurities can be effectivelyremoved on the condition that it is guaranteed that an Al-Mg alloy base metal is not damaged, and then a traditional mechanical grinding mode is replaced.

Description

technical field [0001] The invention relates to a laser cleaning process for an oxide film on the surface of an Al-Mg alloy, belonging to the technical field of laser processing. Background technique [0002] Before welding aluminum alloy materials, in order to ensure the welding quality, it is necessary to clean the oxide film, oil stains and other impurities in the welding parts in advance to reduce welding defects such as welding pores and slag inclusions. [0003] The current conventional cleaning method is to use mechanical grinding. This method is labor-intensive, the dust is scattered after grinding, and it is easy to pollute the environment; especially for Al-Mg aluminum alloys, due to the action of high-energy lasers in the laser cleaning process, the surface of the material will damage the base metal mechanism to a certain extent. base metal damage. Contents of the invention [0004] In order to solve the above-mentioned technical problems, the present inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B7/00
CPCB08B7/0042
Inventor 程永明方喜风张石磊孟祥瑞
Owner CRRC QINGDAO SIFANG CO LTD