Q355钢管-管桁架结构焊接温度场及残余应力分析  

Analysis of Welding Temperature Field and Residual Stress of Q355 Pipe Truss Structure

作　　者：王留中 罗伟[1] 王琛 窦战国 朱军 WANG Liuzhong;LUO Wei;WANG Chen;DOU Zhanguo;ZHU Jun(School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China;Nantong Taisheng Blue Island Offshore Co.,Ltd.,Qidong 226259,China;Hangzhou Turbine Power Group Co.,Ltd.,Hangzhou 310015,China)

机构地区：[1]浙江大学材料科学与工程学院,浙江杭州310027 [2]南通泰胜蓝岛海洋工程有限公司,江苏启东226259 [3]杭州汽轮动力集团股份有限公司,浙江杭州310015

出　　处：《材料科学与工程学报》2023年第3期385-390,共6页Journal of Materials Science and Engineering

摘　　要：采用有限元软件ANSYSWORKBENCH,对T型和Y型Q355管桁架结构管-管相贯节点多层多道手工电弧焊过程进行模拟,获得焊接温度场和焊接残余应力分布。结果表明,两种管-管结构焊接过程中焊接温度场呈非对称不均匀特征,Y型管温度场不均匀性更大。焊接三向残余应力分布复杂,近缝处存在压应力-拉应力-压应力转变且应力最大,但应力值低于母材和焊材的屈服极限,其中T型管横管法向拉应力最大(231.75MPa),竖管纵向拉应力最大(322.38MPa),而Y型管横管纵向拉应力最大(199.79MPa),斜管纵向和法向拉应力最大(~196.49MPa)。The welding temperature field and residual stress distribution of multi-pass shielded metal arc welding for Q355 T-shaped and Y-shaped pipe truss structure were simulated by finite element software ANSYS WORKBENCH.The results show that the temperature distribution of the two types in the welding zone is uneven in the welding process,and the temperature of Y-shaped is more uneven.The distribution of welding residual stresses in three directions,x,y,and z(horizontal,normal and longitudinal directions),is complex,showing the characteristics of compressive stress-tensile stress-compressive stress transformation in the weld and adjacent zone.The stress existed in the zone is the largest,which is less than the yield limit of base metal and welding material.For the T-shaped,the maximum stress existed in the horizontal pipe is normal tensile stress(231.75 MPa),that in the vertical pipe is horizontal tensile stress(322.38 MPa).For the Y-shaped,the maximum stress existed in the horizontal pipe is horizontal tensile stress(199.79 MPa),those in another pipe are horizontal and longitudinal tensile stress(~196.49 MPa).

关 键 词：管桁架结构 有限元分析 手工电弧焊 焊接温度场 焊接应力 

分 类 号：TG401[金属学及工艺—焊接]