连续电火花沉积WC-12Co涂层应力场数值模拟  

Numerical simulation of stress field on WC-12Co coating by consecutive electro spark deposition

作　　者：初未珅 林铁松[1] 何鹏[1] 魏红梅[1] 戴登峰 

机构地区：[1]哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001 [2]绍兴市天龙锡材有限公司,绍兴312001

出　　处：《焊接学报》2016年第2期71-74,132,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51275135;51305102)

摘　　要：为了对连续电火花沉积WC-12Co涂层的残余应力进行分析,文中运用生死单元技术,设定适当边界条件,建立了连续电火花沉积模型,运用ANSYS有限元分析系统进行数值模拟,得到不同深度残余应力随时间变化曲线.结果表明,沉积残余应力主要以平行于工件表面方向的应力为主,且最大拉应力出现在涂层表面上.文中还利用连续电火花沉积模型对工艺参数和残余应力的影响进行了分析,预测了可获得良好涂层界面的最佳工艺参数范围,并通过电火花沉积试验验证了预测结果的正确性.A model of consecutive Electro spark deposition was built,by using birth and death element method and establishing suitable boundary conditions,to analyze the residual stress on WC-12 Co coating by consecutive electro spark deposition. Curves of variation of stress at different depths with time were derived with finite element software ANSYS. It is found that the residual stress was mainly parallel to the surface of workpiece,and the maximum tensile stress appeared on the coating surface. The model of consecutive electro spark deposition was used to analyze the influence of process parameters on the residual stress and to predict the most suitable process parameters window. Electro spark deposition experiments were conducted to verify the simulated results.

关 键 词：电火花沉积 有限元分析 残余应力 工艺参数 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]