不锈钢容器非线性路径补焊的温度场模拟  

Temperature field simulation of nonlinear path repair welding of stainless steel vessels

作　　者：纪东生[1] 周世杰[1] 李云涛[2] 李耀荣[3] 王学兰[3] 

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 [3]天津宝成机械制造股份有限公司,天津300352

出　　处：《电焊机》2015年第6期109-113,共5页Electric Welding Machine

摘　　要：压力容器中焊接裂纹的形状通常是非线性的,焊接模拟过程中,非线性路径的三维瞬态模拟难度较大,同时其温度场和熔池形状是随焊接路径变化的。鉴于此,对双椭球热源模型进行正弦修正,确定热源行进的正弦路径,从而建立三维移动热源模型,并探究温度场和熔池形状随焊接过程的变化规律。结果显示:焊接路径对温度场和熔池形状影响很大,非线性裂纹补焊过程中,温度场和熔池形状存在中心对称性和周期性。The shape of welding crack in pressure vessels is usually norrlinear.In the welding simulation process,three-dimensional transient simulation along curve path is greater difficuh.And the temperature field and molten pool shape change with the welding path. So,in this paper,the double ellipsoid heat source model is implemented sinusoidal correction to determine moving sine path of heat source.And a three-dimensional movable heat source model is established. And the change rule of temperature field and molten pool shape in repair welding process is explored.The results show that welding path has significant effects on temperature field and molten pool shape.ln the repair welding process of nonlinear cracks,temperature field and molten pool shape are central-symmetrical and periodical.

关 键 词：A304不锈钢 非线性路径补焊 热源修正 温度场 

分 类 号：TG409[金属学及工艺—焊接]