A304不锈钢薄板激光焊接熔池受力分析  

Force analysis on molten pool during laser welding of 304 stainless steel sheet

作　　者：周世杰[1] 李云涛[2] 司永宏 段瑞[1] 纪东生[1] 

机构地区：[1]天津市特种设备监督检验技术研究院,天津300060 [2]天津理工大学材料科学与工程学院,天津300384

出　　处：《电焊机》2015年第11期141-146,共6页Electric Welding Machine

摘　　要：开展A304不锈钢薄板激光焊接实验,并在相同实验参数的基础上,对激光热源进行二次开发,利用有限元软件进行三维流场数值模拟。根据流体力学原理,计算出A304不锈钢的雷诺数Re为2.415,所以A304不锈钢熔池内液相流动形式为层流;并在考虑融化潜热、外部环境的散热和材料的热物理性能随温度变化等因素的基础上,讨论表面张力和浮力对熔池流动的影响。通过分析可知模拟结果与激光焊接实验结果一致。An experiment about laser welding of 304 stainless steel sbeet was implemented in this study. And on the basis of same experimental parameters, heat source was performed secondary development. And finite element software was used to simulate three- dimensional fluid field. According to the principles of fluid mechanics, Reynolds number of 304 stainless steel was calculated as 2.415 in this study, so the flow pattern of fluid in molten pool is laminar flow. On the basis of considering the latent heat of mehing, beat dissipation of the external environment, thermal physical properties of materials changing with temperature and other factors, the effects of surface tension and buoyancy on fluid flow of mohen pool were discussed. After compared,it displayed that the simulation results were consistent with experimental results.

关 键 词：304不锈钢 激光焊接 熔池 熔池受力 

分 类 号：TG456.7[金属学及工艺—焊接]