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.