基于SYSWELD的316L不锈钢T型试板焊后热处理数值模拟研究  

Study on Numerical Simulation of Post Weld Heat Treatment of 316L Stainless Steel T-type Test Plates Based on SYSWELD

作　　者：王进 裴鹏 魏巍 杨鑫华 WANG Jin;PEI Peng;WEI Wei;YANG Xinhua(Operation Branch of Shijiazhuang Rail Transit Group Co.,Ltd.,Shijiazhuang 050035,China;CRRC Tangshan Locomotive&Rolling Stock Co.,Ltd.,Tangshan 064099,China;Liaoning Rail Transit Equipment Welding and Reliability Key Laboratory,Dalian 116028,China)

机构地区：[1]石家庄市轨道交通集团有限责任公司运营分公司,河北石家庄050035 [2]中车唐山机车车辆有限公司,河北唐山064099 [3]辽宁省轨道交通装备焊接与可靠性重点实验室,辽宁大连116028

出　　处：《智慧轨道交通》2025年第2期31-37,共7页INTELLIGENT RAIL TRANSIT

基　　金：国家自然科学基金(51875072)。

摘　　要：以316L奥氏体不锈钢为研究对象,通过建立316L奥氏体不锈钢有限元网格模型及双椭球热源模型,结合热弹塑性理论,基于SYSWELD软件对316L奥氏体不锈钢T型焊接试板的焊接过程与焊后热处理开展了数值模拟计算,并对比了焊态和热处理态下的T型接头焊后残余应力分布情况。结果表明:基于建立的焊接仿真模拟的有限元模型,可以实现316L奥氏体不锈钢T型试板的焊接及焊后热处理仿真模拟,并得到相应的温度场以及应力场的分布情况;焊态与热处理态下的T型试板横向及纵向残余应力均呈现为典型的马鞍形,且热处理态的残余应力较焊态高;与焊态下的变形情况相比,热处理态下的T型试板整体变形略微增加。相关研究可为316L奥氏体不锈钢T型试板的焊接残余应力与变形预测及焊后热处理工艺优化奠定基础。This article takes 316L austenitic stainless steel as the object of study.By establishing a finite element mesh model and a double-ellipsoid heat source model for 316L austenitic stainless steel,combined with the thermal elastoplastic theory and based on the SYSWELD software,the numerical simulation calculations were carried out on the welding process and the post weld heat treatment of the 316L austenitic stainless-steel T-type welded test plates.The residual stress distribution after welding of the T-type joints in the as-welded and heat-treated states was compared.The results show that:the established finite element model for simulation of welding allows to simulate the welding process and the post weld heat treatment of the 316L austenitic stainless-steel T-type test plates and get the distribution of corresponding temperature field and stress field;the transverse and longitudinal residual stresses of the T-type test plates in both the as-welded and heat-treated states exhibit a typical saddle shape,and the residual stress in the heat-treated state is higher than that in the as-welded state;compared with the deformation in the as-welded state,the overall deformation of the T-type test plates in the heat-treated state slightly increases.The relevant study may lay a foundation for predicting the residual stress of welding and the deformation of the 316L austenitic stainless-steel T-type test plates and optimizing the post weld heat treatment process.

关 键 词：焊接数值模拟 焊接残余应力 316L奥氏体不锈钢 T型试板 焊接变形 

分 类 号：TG405[金属学及工艺—焊接]