摘要
采用SYSWELD软件,对AISI 304钢–铌异种金属激光焊接过程进行动态模拟,在研究了AISI 304钢–铌异种金属激光焊接接头温度场的基础上,分析了焊后薄板的残余应力分布。结果表明:异种金属焊接温度场呈不对称分布,铌侧高温区域比不锈钢侧要宽;沿焊接方向上,无论是横向残余应力还是纵向残余应力,焊缝中部区域都存在最大残余拉应力;而垂直于焊缝方向上,横向残余应力和纵向残余应力在焊缝及焊缝附近区域应力梯度都比较大,分布形态都呈“M”状,纵向残余应力在焊缝区表现为残余拉应力,而横向残余应力在焊缝中心处出现了压应力。
The dynamic simulation of AISI 304 steel–Nb dissimilar metal laser welding process is carried out by using SYSWELD software.On the basis of studying the temperature field of laser welded AISI 304 steel–Nb dissimilar joint,the residual stress distribution of welded sheet is analyzed.The results show that the temperature field of dissimilar metal welding is asymmetrical,and the high temperature region of Nb side is wider than that of stainless steel side.And there is the maximum residual tensile stress in the middle of weld along the welding direction,whether transverse residual stress or longitudinal residual stress.Perpendicular to the weld direction,the transverse residual stress and longitudinal residual stress are larger in the welding line near line section,and the distribution pattern is“M”.The longitudinal residual stress is residual tensile stress in the weld zone,and the transverse residual stress appears compressive stress in the center of the weld.
作者
施超
石铭霄
赵健
陈书锦
杨志东
SHI Chao;SHI Mingxiao;ZHAO Jian;CHEN Shujin;YANG Zhidong(School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)
出处
《航空制造技术》
2019年第23期59-65,共7页
Aeronautical Manufacturing Technology
基金
国家自然科学基金(51605205)
关键词
铌
AISI
304
钢
激光焊
温度场
残余应力
Niobium
AISI 304
steel
Laser welding
Temperature field
Residual stress
