Die surface machining has been in the area of attention. With the new technologies, new technology development, many of the traditional approach has been not very applicable. The complex shape of the mold, the best way to deal with the surface of the laser, it is virtually non-deformation, surface hardness than the conventional way to deal with the high hardness and wear better and last longer.

    1) laser transformation hardening
  Laser, also known as laser transformation hardening quenched. As the laser hardening when cooling much faster than conventional quenching cooling rate, which can be very fine martensite the organization. Laser transformation hardening of the advantages of hardness for a more conventional high-quenching, deformation small, achievable and local quenching thin layer on the surface, does not affect the mechanical properties of the substrate, and so on. 

    2) laser shock
  Laser shock is a high power density, short-pulse laser beam interaction with the material produced by strong shock wave to change the surface properties of physics and mechanical technology. In the process of laser shock, as the laser-induced shock waves produced by stress than the peak of the dynamic yield stress materials, so that the materials have a dense, uniform, as well as the stability of the dislocation structure of the metal surface so that the plastic deformation occurred, and the formation of deep residual stress So as to enhance the strength of metal parts, wear resistance, corrosion resistance and fatigue life. Its main advantages are: the impact of high-pressure, strengthen the depth of the reach of the traditional shot to strengthen the depth of 4 to 8 times; to the traditional processing technology can not deal with the site, such as small planters, small holes, as well as contour and the like; laser shock after the metal Do not have a surface distortion and mechanical damage, no thermal stress injury, not cause, such as phase-change.

   3) laser alloying and laser cladding
 Laser alloying and laser cladding is to die with a matrix of different components and a certain performance Materials in the mold coating matrix, at the same time with high-energy laser beam coating the region. Laser alloying by regulating the output power of the laser so that the coating material and part of the matrix together and melting occurred in the course of alloying; and laser cladding is coated in layers of laser and under the surface of the matrix through the combination of rapid re-integration, together with the laser alloying The main difference is that by the laser coating after the chemical constituents of non-fundamental changes in the composition of the matrix is basically not enter inside the coating. Based on rapid solidification of the new synthetic materials and the preparation of the laser surface alloying and laser cladding surface modification of the new technology, is to improve the mold at a high temperature wear-resistant material such as high-temperature corrosion resistance properties of one of the most effective way.        

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