ANSYS数值模拟激光熔覆Ni/SiC工艺参数优化  

ANSYS Numerical Simulation of Laser Cladding Ni/SiC Process Parameter Optimization

作　　者：刘立君[1,3] 张金婷 刘大宇 崔元彪 贾志欣[3] 李继强[3] LIU Li-jun;ZHANG Jin-ting;LIU Da-yu;CUI Yuan-biao;JIA Zhi-xin;LI Ji-qiang(School of Materials Science and Engineering,Harbin University of Science and Technology,Harbin 150080,China;School of Mechanical Engineering,Harbin Institute of Technology,Harbin 150081,China;Ningbo Institute of Technology,Zhejiang University,Ningbo 315100,China)

机构地区：[1]哈尔滨理工大学材料科学与工程学院,哈尔滨150080 [2]哈尔滨职业技术学院机械工程学院,哈尔滨150081 [3]浙大宁波理工学院,浙江宁波315100

出　　处：《哈尔滨理工大学学报》2022年第4期81-91,共11页Journal of Harbin University of Science and Technology

基　　金：宁波北仑区关键核心技术攻关项目(2021BLG003);宁波市“科技创新2025”重大专项(2019B10053);黑龙江省自然科学基金(LH2019E057).

摘　　要：针对修复模具表面失效的问题,采用数值模拟技术对激光熔覆Ni/SiC过程进行参数优化。建立了以不同激光电流、扫描速度及离焦量作为优化工艺参数的有限元分析模型,进行激光熔覆仿真分析,通过改变工艺参数的大小对温度场和应力场进行研究。结果表明:温度和残余应力都随激光电流的增大而升高,且它们都随着扫描速度和离焦量的增大而减小。其中,激光电流、离焦量对温度场的影响比扫描速度明显;离焦量对应力场的影响比激光电流和扫描速度明显。经应力场实验验证,最终实验结果与应力场模拟结果的横向残余应力最高处相差76 MPa,纵向残余应力最高处相差86 MPa。实验结果与应力场模拟结果仅存在细微误差,且误差在合理范围内,证明了模拟结果的正确性。对激光熔覆工艺参数进行优化,优化后的工艺参数为:激光电流120 A,扫描速度为60 mm/min,离焦量为50 mm。To overcome the issue of repairing mold surface failure,the parameters of the laser cladding Ni/SiC process is optimized using numerical simulation.The different laser currents,scanning speeds and defocusing are adjusted to optimize simulation result of laser cladding.Meanwhile,the influence of the temperature field and stress field also is studied by changing the size of the process parameters.The simulation results show that temperature and residual stress both increase with the increase of laser current and decrease with the increase of scanning speed and defocusing amount.Among them,the influence of laser current and defocusing amount is more obvious than that of scanning speed on temperature field.The influence of defocus on the stress field is more obvious than that of laser current and scanning speed.Experimental verification shows that the maximum horizontal welding residual stress difference is 76 MPa and the maximum longitudinal welding residual stress difference is 86 MPa.The experimental error within a reasonable range proves the correctness of the simulation results.Finally,the optimized laser cladding process parameters is obtained:laser current is 120 A,scanning speed is 60 mm/min,and defocus is 50 mm.

关 键 词：激光熔覆Ni/SiC 工艺参数优化 有限元模拟 温度场 应力场 

分 类 号：TG456.7[金属学及工艺—焊接]