同轴送粉式激光熔覆残余应力的数值模拟与实验研究  

Numerical Simulation and Experimental Study on Residual Stress of Coaxial Powder Feeding Laser Cladding

作　　者：都嘉鑫 赵春江[1,2] 白峭峰[1,2] 武鹏 刘映良 Du Jiaxin;Zhao Chunjiang;Bai Qiaofeng;Wu Peng;Liu Yingliang(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Engineering Research Center,Ministry of Education of Heavy Machinery,Taiyuan University of Science and Technology,Taiyuan 030024,China;Shuozhou Jinhua Industry Co.,Ltd.,Shuozhou 036000,China)

机构地区：[1]太原科技大学机械工程学院,太原030024 [2]太原科技大学重型机械教育部工程研究中心,太原030024 [3]朔州金华实业有限公司,山西朔州036000

出　　处：《煤矿机械》2020年第3期56-59,共4页Coal Mine Machinery

基　　金：联合基金项目(U1610118);国家重点研发计划(2018YFB1308701);国家自然基金(51375325);山西省重点研发计划项目(201903D121051)。

摘　　要：利用有限元分析方法模拟激光熔覆过程,借助ANSYS软件中的“单元生死”功能和体生热率载荷实现熔覆过程。研究结果表明,在扫描速度不变的情况下,随着激光功率的增大,熔覆温度升高,温度梯度增大,残余应力的主应力增加;当激光功率不变时,扫描速度增大,熔覆温度降低,温度梯度降低,残余应力主应力减小。The laser cladding process was simulated by finite element analysis method,and the cladding process was realized with the help of the element of life and death function in ANSYS software and the body heat generation rate load.The results show that under the condition that the scanning speed is unchanged,with the increase of the laser power,the cladding temperature increases,the temperature gradient increases,and the residual stress increases.When the laser power is unchanged,the scanning speed increases,the cladding temperature decreases,the temperature gradient decreases,and the residual stress decreases.

关 键 词：激光熔覆 数值模拟 残余应力 有限元 

分 类 号：TG174.4[金属学及工艺—金属表面处理]