深熔激光焊接熔池温度场的数值模拟  

Numerical Simulation of Heat Process of the Laser Welding

作　　者：张瑞华[1] 樊丁[1] 片山聖二[2] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050 [2]大阪大学接合科学研究所

出　　处：《机械工程材料》2007年第2期71-74,共4页Materials For Mechanical Engineering

基　　金：教育部博士点专项基金资助项目(20040731001);教育部春晖计划资助项目(Z2004-1-62009)

摘　　要：利用旋转Gauss曲面体新型热源模型,忽略深熔激光焊时小孔对传热的影响,建立了移动激光热源作用下的三维数学模型。利用PHOENICS3．4软件,模拟了SUS304不锈钢深熔激光焊接热过程的温度场和熔池熔合线形状,得到了不同焊接速度下的温度场分布云图和“钉头”状的熔池形状。数值模拟结果与试验结果基本吻合。A mathematical model to describe moving laser welding was developed by using the Rotary-Gauss body heat source model and neglecting the effect of keyhole on thermal conduct. Numerical simulation was conducted by PHOENICS 3. 4 software. The model was applied to laser welding processing of SUS304 stainless steel. The shape of molten pool and the temperature field were analyzed. The shape of molten pool looks like ＂nailhead＂ shape. The simulation results of molten pool shape provide good agree with the practice welding results.

关 键 词：激光焊接 熔池 温度场 数值模拟 

分 类 号：TG40[金属学及工艺—焊接]