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[1] JIAO Haihan, JIN Hui, FAN Yongchun, XU Lu, et al. Numerical simulation of residual stresses in hybrid welding for dissimilar girth welds of cast steel joints [J]. Journal of Southeast University (English Edition), 2025, 41 (3): 305-313. [doi:10.3969/j.issn.1003-7985.2025.03.006]
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Numerical simulation of residual stresses in hybrid welding for dissimilar girth welds of cast steel joints()
铸钢接头异种环焊缝复合焊接工艺残余应力的数值模拟
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
41
Issue:
2025 3
Page:
305-313
Research Field:
Materials Sciences and Engineering
Publishing date:
2025-09-11

Info

Title:
Numerical simulation of residual stresses in hybrid welding for dissimilar girth welds of cast steel joints
铸钢接头异种环焊缝复合焊接工艺残余应力的数值模拟
Author(s):
JIAO Haihan1,2, JIN Hui1,2, FAN Yongchun3, XU Lu3
1.School of Civil Engineering, Southeast University, Nanjing 211189, China
2.Jiangsu Key Laboratory of Engineering Mechanics, Southeast University, Nanjing 211189, China
3.China Energy Engineering Group Guangdong Electric Power Design Institute Co., Ltd., Guangzhou 510700, China
焦海涵1,2, 靳慧1,2, 范永春3, 徐璐3
1.东南大学土木工程学院，南京 211189
2.东南大学江苏省工程力学分析重点实验室，南京 211189
3.中国能源建设集团广东省电力设计研究院有限公司，广州 510700
Keywords:
hybrid welding;  cast steel;  dissimilar girth weld;  residual stress;  numerical simulation
复合焊接; 铸钢; 异种环焊缝; 残余应力; 数值模拟
PACS:
TG404
DOI:
10.3969/j.issn.1003-7985.2025.03.006
Abstract:
The study aimed to address the issue of elevated residual stress levels in dissimilar girth welds of cast steel joints. To achieve this, the hybrid welding technology, which yields high welding speeds while simultaneously reducing residual stresses, has been introduced. This study utilizes a numerical simulation method to investigate the temperature and residual stress field in the hybrid welding of G20Mn5 casting-Q355 low-alloy steel welded pipe. A comparison of the findings of this study with those of other welding processes revealed the technological advantages of hybrid welding. The research outcomes show that due to geometric discontinuities and material differences, the temperature field of the joint exhibits uneven distribution characteristics, and the peak temperatures on the Q355 steel side exceeds those on the G20Mn5 steel side. An evident stress gradient is present in the residual stress field of the joint post-welding, with peak stress located at the weld root on the Q355 steel. Compared with arc welding, the hybrid welding leads to decreased residual stresses and deformation, with high stress outside the heat-affected zone diminishing rapidly. Furthermore, it significantly improves the welding efficiency. This study elucidates the distribution and underlying causes of thermal and residual stress fields in dissimilar girth welds. This serves as a foundation for the application of hybrid welding technology in welded cast steel joints.
为了克服铸钢接头的异种环焊缝残余应力水平高的问题，引入复合焊接技术，该技术可以在实现高焊接速度的同时降低残余应力。本文采用有限元数值模拟方法研究了G20Mn5钢铸件与Q355低合金钢管异种环焊缝复合焊接时的温度场和残余应力场，并与其他焊接工艺进行了比较，证明了采用复合焊接的技术优势。研究结果表明：由于几何不连续性和材料差异，接头的温度场呈现出不均匀的分布特点，Q355钢一侧的峰值温度均大于G20Mn5钢一侧；接头焊后残余应力场存在明显的应力梯度，峰值应力位于Q355钢的焊缝根部；与电弧焊接相比，复合焊接的残余应力和变形较小，热影响区外的高应力迅速降低，焊接效率大大提高。本研究揭示了铸钢接头异种环焊缝热应力场和残余应力场的分布及原因，为复合焊接技术在铸钢接头焊接中的应用提供了依据。

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Memo

Memo:
Received 2025-01-15,Revised 2025-03-25.
Biographies: Jiao Haihan (1997—), male, Ph.D. graduate;Jin Hui (corresponding author), female, doctor, professor, jinhui@seu.edu.cn.
Foundation items:The SEU Innovation Capability Enhancement Plan for Doctoral Students (No.CXJH_SEU 24115), Marine Economic Development Project of Guangdong Province (No.GDNRC [2022]25)).
Citation:JIAO Haihan,JIN Hui,FAN Yongchun,et al.Numerical simulation of residual stresses in hybrid welding for dissimilar girth welds of cast steel joints[J].Journal of Southeast University (English Edition),2025,41(3):305-313.DOI:10.3969/j.issn.1003-7985.2025.03.006.DOI:10.3969/j.issn.1003-7985.2025.03.006
Last Update: 2025-09-20