关键词: 激光热处理, 数学模型, 铸铁, 声学, 梯度移动最小二乘加权, 有限元法, 数值方法

Abstract: The temperature field at different times during laser surface-remelting process was calculated and the melted-depth, phase transformation depth wore predicted by adopting reasonable model of changing thermal properties. Predicted depth was compared with exprimental result, both of them were found almost the same. The temperature field and its change were first displayed with color image. Thereby, theory basis is provided for solidification process research and for the optimizing of technological parameters.

Key words: 激光热处理, 数学模型, 铸铁, Acoustic, Finite element method, Gradient weighted by moving least-squares, Numerical method