The main application in the modification of tool materials is melting treatment. The melting treatment is that the surface of the metal material becomes a molten state under the irradiation of a laser beam, at the same time,it solidifies rapidly to produce a new surface layer. According to the change of the surface structure of the material, it can be divided into alloying, melting coating, remelting refinement, glazing and surface compounding. Laser fusion is a surface modification technology that irradiates the surface of a material with a laser that appropriate parameters,to melt and condense the surface quickly,so that obtain a more refined and homogeneous structure and required properties.
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