06Cr18Ni11Ti不锈钢薄板脉冲TIG焊数值模拟  

Numerical Simulation of Pulse TIG Welding of 06Cr18Ni11Ti Stainless Steel Sheet

作　　者：黄文翔 张春 李汇 孟磊[1] HUANG Wenxiang;ZHANG Chun;LI Hui;MENG Lei(No.724 Research Institute of CSIC,Nanjing 211153,China)

机构地区：[1]中国船舶重工集团公司第七二四研究所,江苏南京211153

出　　处：《热加工工艺》2022年第3期131-133,136,共4页Hot Working Technology

摘　　要：为解决06Cr18Ni11Ti奥氏体不锈钢薄板焊接变形大的问题,选用脉冲TIG焊接方法进行T型焊接,分析接头组织。并采用广义双椭球热源,对焊接应力和变形进行了模拟。结果表明,熔池组织为蠕虫状和树枝状的细小奥氏体,热影响区的晶粒相比于母材未见明显长大,接头组织良好;冷却后的残余应力分布集中,基本在焊缝区域,焊件的整体变形量极小,变形主要表现为焊缝和竖板的z向(竖直方向)收缩,以及绕x轴(焊缝方向)的角变形。In order to solve the problem of lage welding deformation of 06Cr18Ni11Ti austenitic stainless steel sheet,pulse TIG welding was used for the T type welding. The structure of welded joint was analyzed. And the welding stress and deformation were simulated by using a generalized double ellipsoid heat source. The results show that the structure of the molten pool is vermicular and dendritic fine austenite, and the grain size of the heat-affected zone is not bigger than that of the parent material. The structure of welded joint is well. The residual stress after cooling is concentrated and basically in the weld area. The overall deformation of the welded part is minimal. The deformation mainly shows the z direction(vertical direction)contraction of the weld and vertical plate, and the angular deformation around the x axis(weld direction)

关 键 词：脉冲TIG焊 奥氏体不锈钢 焊接应力 焊接变形 

分 类 号：TG404[金属学及工艺—焊接]