厚板埋弧焊接头焊后感应热处理应力场的数值分析  

Numerical Analysis of Residual Stress Fields in Submerged Arc Welded Thick-plate Joints after Post-weld Heat Treatment by Induction Heating

作　　者：王云 梁民航 赵朋成[1] 王璐璐[1] WANG Yun;LIANG Minhang;ZHAO Pengcheng;WANG Lulu(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061

出　　处：《机械制造与自动化》2022年第2期49-51,56,共4页Machine Building & Automation

摘　　要：使用ANSYS软件建立厚板埋弧焊接头的热-力数值分析模型,计算焊接过程中接头的瞬态温度场和应力场分布,分析焊后感应热处理对残余应力的影响。将模拟计算所得的熔池轮廓和残余应力数据与实测厚板焊后值进行对比,验证模型的可靠性。结果表明:焊后厚板埋弧焊接头处的残余应力以拉应力为主,最大残余应力存在于焊缝处,数值为233 MPa;焊后感应热处理后,焊接接头处焊缝区残余应力下降最为明显,下降至160 MPa,减小30%。A thermal mechanical numerical model is established by ANSYS for thick-plate submerged arc welded joints to calculate the transient temperature and stress fields during welding process and to analyze the effects of post-weld heat treatment by induction heating on residual stress pfields. Weld pool profile and residual stress data caculated in simulation are compared with measured one, which verifies the reliability of the model. The results show that the residual stress at the thick-plate submerged arc welded joints is chiefly composed by residual tensile stress, and the maximum stress exists at the weld seam with a value of 233 MPa. After induction heat treatment, the most significant decrease of the residual stress occurs in the weld area of the welded joint, descending to 160 MPa with an overall decrease of 30%.

关 键 词：厚板 埋弧焊 感应加热 焊后热处理 残余应力 

分 类 号：TG404[金属学及工艺—焊接]