电火花堆焊温度场、应力场的二维与三维数值模拟

国内有文献报道，用电火花表面堆焊技术精密修复失重型失效零部件，但对其表面堆焊温度场、应力场的模拟并未系统研究，本文运用有限元软件ANSYS对电火花堆焊的温度场、应力场分别建立二维与三维模型，进行焊接过程模拟，并计算出了温度场、残余应力场的分布及残余变形的状况。二维计算得到的应力数值范围是-9MPa～57．5MPa，三维计算得到的应力数值范围是-12MPa-52MPa，并对二维模型进行残余变形分析，计算得到最大变形为0．861E-6m，证明了电火花堆焊这种精密修复工艺的优良性。

2D and 3D Numerical Simulation of Temperature Field and Stress Field of Electro-spark Overlaying Welding

In China, it was reported that weight-loss damage parts were accurately repaired by electro-spark overlaying welding, but the numerical simulation of its temperature field and stress field were not studied systematically. 2D and 3D model of temperature field and stress field of electro-spark overlaying welding were established by ANSYS, the welding process was simulated, and the distribution of temperature field and residual stress field and the status of residual deformation were calculated. The residual stress of 2D model was -9MPa-57.5MPa, the residual stress of 3D model was -12MPa-52MPa, the residual deformation of 2D model was analyzed,and the maximal residual deformation of 2D model was 0.861E-6m.The result has proved that the accurate reparation technology of electro-spark overlaying welding is excellent.