Laser quenching

Laser quenching

Laser surface hardening is a technology that utilizes a high-energy laser beam to scan the workpiece to harden the surface of the scanned area. The basic principle is to use a certain energy density (103 ~ 105W/cm2) of laser irradiation of the workpiece, so that the irradiated surface area is rapidly heated to the phase transition point above the melting point of the following temperatures, at this time, the workpiece matrix is still in the cold state, the heating zone and the substrate between the existence of a large temperature gradient, when the laser beam stops irradiating, due to the role of heat conduction, the heating zone will be rapidly cooled (106 ~ 108 ℃) / s) and martensitic transformation occurs, so that the surface layer of the workpiece can realize the phase transition hardening.