Method for enhancing surface of magnesium aluminium alloy by laser remelting
A magnesium-aluminum alloy, laser remelting technology, applied to the surface of non-ferrous metal alloys to coat metal to improve strength, laser remelting field, can solve problems such as unsatisfactory, poor chemical stability, low strength
Inactive Publication Date: 2009-09-16
TAIYUAN UNIV OF TECH
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Problems solved by technology
[0003] Although magnesium alloy has many advantages, the application of magnesium alloy is greatly limited due to its low specific gravity, low strength, poor chemical stability, poor surface wear resistance and corrosion resistance, and its surface hardness, strength and toughness are very low. Therefore, the surface of magnesium alloy must be treated to improve surface strength, wear resistance and corrosion resistance, so that it can be used more widely.
[0004] At present, there are many methods for improving the surface properties of magnesium alloys, such as ion implantation, surface diffusion alloying, vapor deposition coating, coating treatment, chemical surface treatment, mechanical surface treatment, etc. Although there are It has a certain effect, but there are also some disadvantages, which are not ideal enough and need further discussion and research
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[0107] The present invention will be further described below in conjunction with accompanying drawing:
[0108] figure 1 As shown, it is a process flow chart of the laser remelting enhancement method for magnesium-aluminum alloy plates, which must be carried out step by step and operated in sequence.
[0109] The amount of chemical substances and materials used in this enhancement method is set and determined based on the specifications, surface area, and depth of the alloy layer of the magnesium-aluminum alloy plate and magnesium-aluminum alloy rod, in grams, milliliters, and centimeters 3 , mm is the unit of measurement.
[0110] The surface roughness of the magnesium-aluminum alloy plate is expressed in R a 2.5-5.0μm is appropriate, and the surface should not be too smooth, so as to facilitate the adhesion and curing of aluminum nickel powder.
[0111] The aluminum-nickel alloy powder is mainly made of aluminum, accounting for 90%, nickel is 10%, and the coating thicknes...
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The invention relates to a method for enhancing the surface of magnesium aluminium alloy by laser remelting, aiming at enhancement processing of the surfaces of magnesium aluminium alloy plates and magnesium aluminium alloy rods by the methods of flame spraying of alloyed powder and laser remelting. The method is characterized by cleansing the surface of the magnesium aluminium alloy, carrying out oxy-acetylene flame spraying on the alloyed powder, namely aluminium nickel alloy powder, nickel-chromium-boron-silicon-iron master alloy powder and neodymium powder, carrying out remelting and curing on the surface of the magnesium aluminium alloy on a laser processor, carrying out omnibearing radiation by laser beams according to trace curves set by computer programs so that a nickel base alloy layer is melted and cured on the surface of the magnesium aluminium alloy to form the alloy layer, therefore, the hardness of the surface of magnesium aluminium alloy is greatly improved by 8-10 times as high as that before processing, the wearing resistance and corrosion resistance of the surface of magnesium aluminium alloy are greatly improved respectively by 56% and 56.4%. The method has short process flow, easy realization, safety, stability and reliability and firm solid melting layer, is not easy to fall off and can enhance the surfaces of the magnesium aluminium alloys with various profiles.
Description
technical field [0001] The invention relates to a laser remelting enhancement method for the surface of magnesium-aluminum alloy, which belongs to the technical field of coating metal on the surface of non-ferrous metal alloys, laser remelting, and improving strength. Background technique [0002] Among non-ferrous metal alloys, magnesium alloy is one of the lightest alloys, with light specific gravity, low density, high specific strength and specific stiffness, good thermal and electrical conductivity, good damping and shock absorption and electromagnetic shielding performance, easy to die-casting, cutting It has excellent performance and is easy to recycle and reuse. It is widely used in aerospace, electronic devices, instruments, communication equipment, computers, and machinery manufacturing. Magnesium alloy is one of the alloys with the most development prospects and application potential. [0003] Although magnesium alloy has many advantages, the application of magnesi...
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Login to View More IPC IPC(8): C23C28/02C23C24/10C23C4/06C23C4/12C23C4/08C23C4/129
Inventor 许并社崔泽琴王文先刘旭吴宏亮
Owner TAIYUAN UNIV OF TECH