304不锈钢TIG焊接工艺及数值模拟  

TIG welding process and numerical simulation of 304 stainless steel

作　　者：赵先锐 左敦稳[2] 张强勇[1] 刘桂香 杜训柏[1,2] ZHAO Xianrui;ZUO Dunwen;ZHANG Qiangyong;LIU Guixiang;DU Xunbai(School of Naval Architecture and Ocean Engineering,Jiangsu Maritime Institute,Nanjing 211170,China;College of Mechanical&Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]江苏海事职业技术学院张强勇技能大师工作室,江苏南京211170 [2]南京航空航天大学机电学院,江苏南京211106

出　　处：《电焊机》2021年第5期49-55,I0005,共8页Electric Welding Machine

摘　　要：采用TIG焊对304不锈钢进行平板焊接试验,并从微观组织、力学性能方面对试验结果进行分析,选出最佳工艺参数为:焊接电流310 A、焊接速度13 mm/s。通过金相组织表征、X射线荧光衍射和电子背散射衍射等分析方法得出焊接接头的焊缝组织奥氏体和铁素体组成。采用大型通用有限元模拟软件Abaqus,选用双椭球热源模型对TIG焊接过程进行模拟。将模拟获得的焊缝截面形貌与试验获得的焊缝截面形貌进行对比,并根据对比结果优化模拟模型,为实现工艺参数优化提供参考。In this paper,the TIG welding technology is used to perform a plate welding test on 304 stainless steel,and the test results are analyzed from the microstructure and mechanical properties,the optimum welding parameters are selected as welding current of 310 A and welding speed of 13 mm/s.The composition of austenite and ferrite in weld microstructure of welded joint is obtained by metallographic characterization,X-ray fluorescence diffraction and electron backscatter diffraction.According to the optimum welding parameters,the large-scale finite element simulation software ABAQUS is selected,and the TIG welding process is simulated by double ellipsoid heat source model.The weld cross-section morphology obtained by simulation and test are compared,and according to comparison results,the simulation model is optimized to provide reference for the optimization of welding parameters.

关 键 词：304不锈钢 TIG焊接 温度场 数值模拟 

分 类 号：TG457.11[金属学及工艺—焊接]