能量排布方式对双光束激光填丝焊温度场与应力场的影响  

Effect of energy arrangement on temperature field and stress field in dual-beam laser welding process with filler wire

作　　者：雷正龙 陈彦宾[1] 吕涛[1] 刁旺战[1] 孙忠绍 陈济轮[2] 

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]首都航天机械公司,北京100076

出　　处：《焊接学报》2012年第11期83-88,117,共6页Transactions of The China Welding Institution

摘　　要：建立了面热源+双圆柱体热源的双光束激光焊接热源模型,并结合Marc有限元软件,对光束间距为0.6 mm的双光束激光填丝焊接铝合金的温度场和应力场进行了数值模拟,分析了不同能量排布方式对焊缝熔池温度分布特征及其残余应力的影响.随着光束与焊缝中心线所成角度的减小,热源熔化效率逐渐减小;焊后焊缝区残余应力主要为纵向拉应力,能量排布方式对残余应力最大值的影响不明显,其主要影响残余应力分布区域范围和焊接工件角变形.The heat source model of double-cylinder heat source + surface heat source is established in dual-beam laser welding process.Based on the finite element software Marc,the temperature field and stress-strain field of dual-beam laser welding with filler wire are simulated when the distance between two beams is 0.6 mm.And the effect of energy arrangement on the temperature characteristics and residual stress distribution are analyzed.The simulated results show that the heat melting efficiency decreases gradually with the decrease of the angle between the beam and the weld center.The residual stress mainly concentrate on longitudinal tensile stress in weld zone.At the same time,it can be found that the energy arrangement mainly affect the residual stress distribution and the angular deformation of the weld,while the effect on the maximum residual stress is not obvious.

关 键 词：双光束激光焊接 能量排布 温度场 残余应力 数值模拟 

分 类 号：TG456.7[金属学及工艺—焊接]