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针对激光熔覆过程的特点,基于有限元分析软件ANSYS,对45钢送丝激光熔覆过程的温度场和应力场进行三维数值动态模拟。建模时采用实体单元和表面单元相结合的方式,采用参数化设计划分网格,施加热源载荷,设定初始条件和基本边界条件,对流边界条件进行求解。分析了激光熔覆过程中温度场在工件上的分布规律,揭示了整个时间历程上应力强度的变化规律,为提高激光熔覆质量提供了理论依据。
According to the characteristics of laser cladding process, based on the finite element analysis software ANSYS, the temperature field and stress field in 45 steel wire-fed laser cladding process were simulated by 3D numerical simulation. The modeling method uses the combination of solid element and surface element, and uses the parametric design to divide the grid, apply the heat source load, set the initial conditions and basic boundary conditions, and solve the convection boundary conditions. The distribution rule of the temperature field on the workpiece during the laser cladding process was analyzed. The variation of the stress intensity during the whole time history was revealed, which provided a theoretical basis for improving the laser cladding quality.