Laser hardening, Yao Shuo laser, laser hardening surface restoration

 Laser hardening laser surface hardening technology and its characteristics is a high energy laser beam scans the surface of the workpiece so that the area to be scanned hardening technology. The basic principle for the use of certain energy density (103 ~ 105W / cm2) of laser irradiation of the workpiece, so that the surface area to be irradiated is rapidly heated to a point above the phase transition temperature below the melting point, the substrate is still at this time the workpiece is cold, heating between the base region and the large temperature gradient, when the laser beam irradiation is stopped, due to the effect of heat conduction, the heating zone will rapidly cooled (106 ~ 108 ℃ / s) and martensite transformation occurs, so that the surface of the workpiece to achieve a phase change hardened. (1) laser quenching is fast heating, self-excited cooling, no insulation and cooling liquid quenching furnace, is a pollution-free green heat treatment process can be easily implemented even large mold surface hardening. (2) Since the laser heating speed, small heat-affected zone, but also a surface scan Hardening, namely instant local heating quenching, the mold is processed and transformed so small. (3) Since the laser beam divergence angle is small, has good directivity, through the light guide system for precise mold surface hardening. (4) laser surface hardening the case depth is generally 0.3 ~ 0.7mm. \