The Theoretical and Experimental Analysis of Thermal Circulation During Laser Surface Strengthening
The effect of surface strengthening by laser scanning is determined by the thermal circular principles essentially. In order to obtain the reasonable hardening depth and micro-hardness distribution, the temperature distribution resulted from laser strengthening must be analyzed exactly. As the laser processing contains many kinds of physics phenomena, it is very difficult to analyze the procedure precisely through analytical methods. On the other hand, it is impossible to monitor the procedure dynamically. Based on the above difficulties, the numerical simulation methods are carried out in this article. According to the basic theory of heat transfer, the FEM model combining laser treatment characteristics for simulation analysis has been founded. The simulation results have shown that the energy induced by laser radiation concentrates on a minor area near to the laser spot. As a result, the transient high temperature region only lies in the laser spot. At the same time, not only the heating speed but also the cooling rate change sharply following the laser movement. Through the experimental test, the numerical results using FEM analysis are satisfactory.
Laser strengthening Thermal circulation Temperature distribution
Jianyu ZHANG Lingli CUI Lixin GAO Huigang WANG Jiuxia YANG
Beijing key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology, Beiji Tang shan Institute, Hebei 063000, China Beijing Oriental Enterprise, Beijing, China
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）