3D激光熔覆陶瓷-金属复合涂层温度场的有限元仿真与计算

Simulation and Calculation of 3D Laser Cladding Temperature Field of Ceramic-Metal Composite Coatings by Finite Element Method

通过建立移动激光高斯热源作用下三维熔覆温度场的计算机数值分析模型 ,在分析过程中引入了复合材料热物性参数的计算方法 ,考虑了相变潜热和辐射对流散热等因素 ,用ANSYS中的ADPL语言编制了相应的计算机程序 ,具有较高的计算精度。在不同的工艺参数条件下 ,用该模型对激光熔覆陶瓷 金属复合涂层温度场进行了分析计算 ,得出了熔覆过程中试样表面、端面的温度等值线分布和温度梯度分布 ,预测了熔池的轮廓、热影响区的形状、交界面的结合情况等 ,为研究激光熔覆陶瓷 金属复合材料涂层的覆层成型和凝固机制、根据熔覆层的材料设计要求选择激光熔覆工艺参数等提供了依据。

Computational model is established for analysis of 3D laser cladding temperature field caused by moving gauss distributing heat source.In the model,a calculation method of the thermal properties of composite materials has been introduced in consideration of latent heat,radiation and convection etc.The program prepared by the ADPL language attached to the commercial software ANSYS has high precision.The laser cladding process has been calculated and analyzed by the model under different processing parameters,the surface and section's isotherm and temperature grads have been attained.Therefore,the pool's profile,the shape of heat affected zone and the state of the interface have been forecasted,which has provided a guide for study on the formation and solidification mechanism of laser cladding ceramic-metal composite coatings,and the design of laser cladding parameters.