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焊接学报  2022, Vol. 43 Issue (1): 1-6    DOI: 10.12073/j.hjxb.20210627001
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
低碳钢三丝间接电弧焊传热机制及工艺性能
王泽力, 张天奕, 刁国宁, 徐国敏, 刘黎明
大连理工大学, 辽宁省先进连接技术重点试验室, 大连, 116024
Heat transfer mechanism and mechanical properties of triple-wire gas indirect arc welding for low carbon steel
WANG Zeli, ZHANG Tianyi, DIAO Guoning, XU Guomin, LIU Liming
Liaoning Province Key Laboratory of Material Welding and Joining Technology, Dalian University of Technology, Dalian, 116024, China
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摘要 为减小低碳钢焊接热输入、优化焊接变形等缺陷,使用三丝间接电弧焊(triple-wire gas indirect arc welding, TW-GIA焊)方法,并利用红外测温系统及高速成像设备对TW-GIA焊传热机制进行了测量. 结果表明,TW-GIA焊具备显著的小热输入优势,可实现无明显焊接变形的单道焊成形,热影响区宽度小于MIG焊. 与传统电弧焊不同,随着焊接高度的增加,TW-GIA焊热输入逐渐降低,焊接高度从4 mm增至24 mm时,传热模式由电弧热对流 + 熔池热传导转变为仅熔池热传导. TW-GIA焊焊缝及热影响区晶粒尺寸细小,并消除了魏氏体的存在,焊缝区平均显微硬度可达289.8 HV,最大抗拉强度为472 MPa,断后伸长率为26.5%.
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王泽力
张天奕
刁国宁
徐国敏
刘黎明
关键词 三丝间接电弧焊热输入焊接变形力学性能    
Abstract:In order to reduce the welding heat input of low carbon steel and optimize the welding deformation and other defects, the triple-wire indirect arc welding (TW-GIA welding) method was used, and the heat transfer mechanism of TW-GIA was discussed based on the infrared temperature measurement system and high-speed imaging measurement results. The results show that TW-GIA welding has a significant advantage of small heat input, and can realize single-pass welding without obvious welding deformation. The width of the heat affected zone was smaller than that of MIG welding. Unlike traditional arc welding, the heat input of TW-GIA welding gradually decrease with the increase of welding height. Heat transfer mode changed from arc heat convection + molten pool heat conduction to only molten pool heat conduction when the welding height increased from 4 mm to 24 mm. The grain size of TW-GIA fusion zone and heat affect zone was small, and the widmannstatten structure was eliminated. The average microhardness of TW-GIA weld zone reached 289.8 HV, the maximum tensile strength was 472 MPa, and the elongation was 26.5%.
Key wordstriple-wire gas indirect arc welding    heat input    welding deformation    mechanical properties
收稿日期: 2021-06-27      出版日期: 2022-04-18
ZTFLH:  TG 444  
基金资助:国家自然科学基金资助项目(52175290)
通讯作者: 刘黎明,博士,教授,博士研究生导师;Email: liulm@dlut.edu.cn.     E-mail: liulm@dlut.edu.cn
作者简介: 王泽力,博士研究生;主要从事电弧焊接技术研究; Email: wangzeli@mail.dlut.edu.cn
引用本文:   
王泽力, 张天奕, 刁国宁, 徐国敏, 刘黎明. 低碳钢三丝间接电弧焊传热机制及工艺性能[J]. 焊接学报, 2022, 43(1): 1-6.
WANG Zeli, ZHANG Tianyi, DIAO Guoning, XU Guomin, LIU Liming. Heat transfer mechanism and mechanical properties of triple-wire gas indirect arc welding for low carbon steel. Transactions of The China Welding Institution, 2022, 43(1): 1-6.
链接本文:  
http://qikan.cmes.org/hjxb/CN/10.12073/j.hjxb.20210627001      或      http://qikan.cmes.org/hjxb/CN/Y2022/V43/I1/1
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