Modulating Temperature Field Of Laser Hardening And Laser Parameters Optimization

For Laser Transformation Hardening (LTH) ,the maximal crescent-shaped sizes of the hardening case are closely to the temperature field induced by laser scanning on the surface of the part. First, Laser Transformation Hardening concept and its features are induced in brief. Second, the researches and the latest achievements on temperature distribution and prediction of hardened case made by many researchers are presented. The author makes an opinion that there is a feature of three-dimensional distribution in temperature field induced by laser scanning. Then a physical model with three dimensions motive transient conduction is set up. Finally, an analytical formula of three dimensions motive transient temperature distribution served for circular beam mode with homogenous power density is presented through suitable mathematics processing. Based on the optimization theory in the case of a given laser hardened case, the author simulates the temperature field of Laser Transformation Hardening and optimizes the laser hardening parameters with the ANSYS5.5 finite cell software which is current and high-efficient in the world nowadays. It is the author's useful attempt in the optimization of laser hardening parameters. It is proved that the research methods are reasonable and the theoretical prediction of the hardened case is fairly reliable and accurate.