基于SYSWELD的管板结构多道焊模拟分析  

Simulation Analysis of Multi-pass Welding of Tube Plate Structure Based on SYSWELD

作　　者：高耀东[1] 郭忠亮 范要鹏 王壮壮 GAO Yaodong;GUO Zhongliang;FAN Yaopeng;WANG Zhuangzhuang(School of Mechanical Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学机械工程学院,内蒙古包头014010

出　　处：《热加工工艺》2022年第13期126-130,136,共6页Hot Working Technology

摘　　要：为研究大型管板焊接件在焊接处的残余应力以及焊接变形的局部特征,以单个管板焊接为例,基于热弹塑性有限单元法,采用焊接仿真软件SYSWELD对某Q235管板构件进行数值仿真,得到焊接过程中温度、应力、位移、相变的变化。仿真结果表明:冷却后,焊缝处金属组织为贝氏体和马氏体;焊接残余应力出现在焊缝及其热影响区附近,横向残余应力均为拉应力,其峰值出现在中间焊道位置,超过材料的屈服极限;焊缝的纵向残余应力,除第五道焊缝外,其值均低于材料屈服极限;焊缝处横向变形先拉伸后压缩,在结束位置变形几乎为0。In order to study the residual stress and local characteristics of welding deformation of large tube plate welding parts, taking single tube plate welding as an example, the numerical simulation of the Q235 tube plate components was carried out by using welding simulation software SYSWELD based on the thermoelastoplastic finite element method. The changes of temperature, stress, displacement and phase transition during welding were obtained. The simulation results show that after cooling, the microstructure of the weld metal is bainite and martensite;the welding residual stress appears near the welding seam and its heat-affected zone, and the transverse residual stress is tensile stress, and the peak value appears in the middle pass, which exceeds the yield limit of the material. The longitudinal residual stress of the weld is lower than the yield limit of the material except the fifth weld. The transverse deformation at the weld is stretched at first and then compressed, and the deformation at the end position is 0.

关 键 词：管板焊接 残余应力 焊接变形 

分 类 号：TG404[金属学及工艺—焊接]