采用高斯脉冲函数建立激光脉冲热源,应用传热学原理、控制方程理论、有限元技术建立结构钢表面激光热处理工艺模型,将激光入射热通量作为在结构钢表面分布的热源来处理,得到了结构钢的瞬态热响应,以判断其热处理温度是否达到相变点温度而低于熔点,从而实现结构件表面的相变硬化,依此对激光热处理工艺进行优化。该模型还可以探讨其他形式的热源对结构钢件热处理温度的影响。 The laser pulse heat source was established by Gaussian pulse function. The laser heat treatment process model of the structural steel was established by using the theory of heat transfer, the control equation and the finite element method. The laser heat flux was treated as the heat source distributed on the surface of the structural steel. Structural steel transient thermal response to determine whether the heat treatment temperature reaches the phase transition temperature below the melting point, in order to achieve the phase transformation hardening of the structure surface, laser heat treatment process is thus optimized. The model also explores the effect of other forms of heat sources on the heat treatment temperature of structural steels.