• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2020, Vol. 56 ›› Issue (21): 38-47.doi: 10.3901/JME.2020.21.038

• 特邀专栏:核能装备设计制造及服役 • 上一篇    下一篇

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SUS310S不锈钢局部真空电子束焊接接头残余应力及变形研究

胡兴1, 彭昭成2, 冯广杰1, 李索1, 邓德安1, 袁军2   

  1. 1. 重庆大学材料科学与工程学院 重庆 400045;
    2. 二重(德阳)重型装备有限公司 德阳 618000
  • 收稿日期:2019-11-12 修回日期:2020-05-18 出版日期:2020-11-05 发布日期:2020-12-19
  • 作者简介:胡兴,男,1995年出生。主要研究方向焊接残余应力数值计算。E-mail:hux_987@163.com;邓德安(通信作者),男,1968年出生,教授,博士研究生导师。主要研究方向为焊接残余应力计算。E-mail:deandeng@cqu.edu.cn
  • 基金资助:
    国家自然科学基金(51875063)和中央高校基本科研业务费(NO.2019CDXY CL0031)资助项目。

Numerical Simulation of Residual Stress and Deformation of SUS310S Stainless Steel Local Vacuum Electron Beam Welded Joint

HU Xing1, PENG Zhaocheng2, FENG Guangjie1, LI Suo1, DENG Dean1, YUAN Jun2   

  1. 1. College of Materials Science and Engineering, Chongqing University, Chongqing 400045;
    2. Erzhong (Deyang) Heavy Equipment Co., Ltd., Deyang 618000
  • Received:2019-11-12 Revised:2020-05-18 Online:2020-11-05 Published:2020-12-19

摘要: 作为一种新型焊接方法,局部真空电子束焊接常被用于制造厚大的奥氏体不锈钢焊接接头,而该类接头的焊接残余应力和变形问题受到广泛关注。对板厚40 mm的SUS310S不锈钢局部真空电子束焊接的对接接头进行了研究,并利用光学显微镜表征接头的组织形貌,利用显微硬度计测量接头的硬度分布,采用盲孔法装置和三坐标测量仪测量了接头的残余应力与面外变形。同时,基于ABAQUS有限元软件平台,通过编写用户子程序开发了一种复合热源模型来模拟局部真空电子束焊接过程中的热输入。采用所开发的“热-弹-塑性有限元”计算方法,模拟了接头在局部真空电子束焊条件下的残余应力与变形,模拟结果与试验结果吻合良好,验证了所开发的“热-弹-塑性有限元方法”的有效性。同时基于数值模拟结果,还详细讨论了局部真空电子束焊厚板对接接头的残余应力分布与焊接变形特征。

关键词: 局部真空电子束焊, SUS310S不锈钢, 复合热源模型, 焊接残余应力, 焊接变形

Abstract: As a new welding method, local vacuum electron beam welding is often used to fabricate thick austenitic stainless-steel welded joints. The welding residual stress and deformation of these joints have always been the focus of attention. A SUS310S austenitic stainless-steel butt joint with a thickness of 40 mm is welded by local vacuum electron beam equipment. Optical microscope and Vickers hardness tester are used to characterize the microstructure and hardness distribution of the joint, respectively. Hole-drilling strain-gauge method and trilinear coordinates measuring instrument are employed to measure the residual stress and the out-of-plane deformation of this joint, respectively. Based on the ABAQUS finite element software platform, a combined heat source model is developed to simulate the heat input in the local vacuum electron beam welding process, then the "thermal-elastic-plastic" finite element calculation method is developed to simulate the residual stress and deformation of SUS310S thick plate butt joint. The simulation results agree well with the experimental data, which verifies the effectiveness of the combined heat source model and the “thermal-elastic-plastic” finite element method developed. Meanwhile, the residual stress distribution and welding deformation of the local vacuum electron beam welded joint are also discussed in detail based on the simulation results.

Key words: local vacuum electron beam welding, SUS310S stainless steel, combined heat source model, residual stress, welding deformation

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