Mold surface treatment has been valued in the field of machining problems. With the development of new technologies, there are many traditional approach is not applicable. Complex shape of the mold, the best way is to use a laser surface treatment carried out, it is almost no distortion, surface hardness than the hardness of the conventional approach is high, and more wear and longer life.

1) laser transformation hardening
Laser transformation hardening, also known as laser hardening. Because the laser quenching is much faster than conventional quenching cooling rate, which can get very fine martensite. Laser transformation hardening of advantages compared to conventional quenching high hardness, deformation, can achieve a thin surface layer and partial quenching, does not affect the mechanical properties of the substrate and so on.

2) laser shock
Laser shock is a strong shock wave laser beam and the material of high power density, short pulse interaction to change the physical and mechanical properties of the material surface technology. In the process of laser shock processing, the peak stress due to the laser-induced shock waves is greater than the dynamic yield stress of the material, whereby the material to produce dense, homogeneous and stable dislocation structures, the metal surface is plastically deformed and formation of deep compressive residual stresses, thereby increasing the strength of the metal parts, wear resistance, corrosion resistance and fatigue life. Its main advantages are: the impact of high pressure, strengthen the depth of conventional shot peening depth 4-8 times: the ability to process parts of the traditional process can not handle, such as small grooves, holes and contours of the categories: metal reinforced after laser shock distortion and surface does not produce mechanical damage, no thermal stress damage, does not cause phase transition.

3) laser alloying and laser cladding laser alloying and laser cladding is a layer of mold base components with different properties of a certain material is applied in the mold base, and coated with a high-energy laser beam area. Laser alloying laser output power by adjusting the coated substrate material together with some melting and alloying process occurs: The laser cladding is coated with a layer at the substrate surface laser action by fusing together again quickly combine it with the laser alloying the main difference is that the chemical composition of the coating after laser action does not substantially change in composition of the substrate into the coating does not substantially. Based on the rapid solidification of new materials synthesis and preparation of laser surface alloying and laser cladding surface modification of new technologies, is one of the most effective ways to improve the mold material wear and corrosion at high temperatures, such as high-temperature performance.