WE43镁合金激光熔覆温度场和应力场数值模拟  

Numerical Simulation on Temperature and Stress Field of WE43 Magnesium Alloy Laser Cladding

作　　者：胡正强 雷声 申家升 张海浪 李云 HU Zhengqiang;LEI Sheng;SHEN Jiasheng;ZHANG Hailang;LI Yun(School of Mechanical and Electrical Engineering,Anhui Jianzhu University,Hefei 230601,China;Key Laboratory of Intelligent Manufacturing of Construction Machinery of Anhui Province,Hefei 230601,China)

机构地区：[1]安徽建筑大学机械与电气工程学院,安徽合肥230601 [2]安徽省工程机械智能制造重点实验室,安徽合肥230601

出　　处：《热加工工艺》2024年第24期97-101,110,共6页Hot Working Technology

基　　金：安徽省高校省级自然科学研究项目重大项目(KJ2020ZD42)。

摘　　要：采用高斯面热源建立了WE43镁合金表面激光熔覆Al-Si共晶粉末过程的温度场以及热应力场数值模型。通过改变激光熔覆功率和激光扫描速度,得到了温度云图,并获取了同一节点的温度热循环曲线和热应力分布图。结果表明,随着激光功率的增加,激光熔覆涂层的最高温度和热应力均持续增加。此外,当保持激光熔覆功率600 W不变时,随着激光扫描速度的提高,激光熔覆涂层的最高温度呈现出降低的态势,然而热应力却呈先降低后上升趋势。理论上WE43镁合金表面激光熔覆Al-Si共晶粉末的最佳激光功率为600 W,最佳扫描速度为3 mm/s。The numerical models of temperature field and thermal stress field of laser cladding Al-Si eutectic powder on WE43 magnesium alloy surface were established by using Gaussian surface heat source.By varying the laser melting power and laser scanning velocity,the temperature clouds maps were obtained,and the temperature thermal cycling curves and thermal strain distribution maps of the same node were also obtained.The results indicate that the highest temperature and thermal stress of the laser clad coating both rise continuously with the increase of laser power.In addition,when the laser power is kept constant 600 W,the highest temperature of the laser clad coating exhibits a decreasing trend with the increase of the laser scanning velocity,however,the thermal stresses display a first decreasing and then increasing trend.Theoretically,the optimal laser power for laser coating of Al-Si eutectic powder on the surface of WE43 magnesium alloy is 600 W and the optimal scanning velocity is 3 mm/s.

关 键 词：WE43镁合金 激光熔覆 数值模拟 

分 类 号：TG174[金属学及工艺—金属表面处理]