激光熔覆温度场数值模拟分析

Numerical Simulation Analysis of Laser Cladding Temperature Field

激光熔覆,亦称激光熔敷或激光包覆,是一种新的表面改性技术。它通过在基材表面添加熔覆材料,并利用高能密度的激光束使之与基材表面薄层一起熔凝的方法,在基层表面形成冶金结合的添料熔覆层。采用ANSYS的热力学模块对15组单道激光熔覆参数进行数值模拟,研究了高斯移动热源模型下温度场中等值线的分布特点以及整个熔覆过程中最高温度变化,分析了激光参数对整个熔覆系统温度的影响以及在几何模型中心位置横截面上温度从熔覆层顶端到基材方向温度的变化情况。

Laser Cladding, also known as laser cladding or laser cladding, is a new surface modification technology. It forms a metallurgically bonded additive cladding layer on the surface of the base material by adding cladding material to the surface of the base material and using a high-energy-density laser beam to fuse it with a thin layer on the surface of the base material. The thermodynamics module of ANSYS was used to numerically simulate 15 sets of single-pass laser cladding parameters. The distribution characteristics of the temperature field isolines under the Gaussian moving heat source model and the maximum temperature change during the entire cladding process were studied. The effect of the laser parameters on the entire cladding process was studied, and the influence of the temperature of the cladding system and the change of temperature in the cross-section at the center of the geometric model from the top of the cladding layer to the direction of the substrate was analyzed.