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材料导报  2023, Vol. 37 Issue (16): 22020034-5    https://doi.org/10.11896/cldb.22020034
  金属与金属基复合材料 |
补焊工艺对30CrMnSiA接头微观组织及性能的影响研究
张兵宪1, 杜明科2, 雷龙宇2, 张敏2,*, 张志强2
1 中航西安飞机工业集团股份有限公司,西安 710087
2 西安理工大学材料科学与工程学院,西安 710048
Research on the Influence of Repair Welding Process on Microstructure and Properties Around 30CrMnSiA Welded Joint
ZHANG Bingxian1, DU Mingke2, LEI Longyu2, ZHANG Min2,*, ZHANG Zhiqiang2
1 AVIC Xi'an Aircraft Industry Group Company Ltd, Xi'an 710087, China
2 College of Material Science and Technology, Xi'an University of Technology, Xi'an 710048, China
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摘要 为了降低企业成本、避免检修过程中大型结构件直接更换造成的资源浪费,针对30CrMnSiA焊接件服役过程中出现的裂纹缺陷开展了补焊试验。试验过程中的焊缝填充金属分别选用HTJ-3、HTG-1焊条,并采用金相、扫描电镜、电子背散射衍射、拉伸、冲击、弯曲等试验对补焊前后接头的组织和性能进行表征分析,建立微观组织与力学性能之间的依存关系,为结构钢钢补焊工艺的优化提供一定的理论支撑。结果表明:补焊前后焊缝底部区域的组织均以马氏体+铁素体为主。补焊过程采用HTG-1作为填充金属,使得补焊区沿垂直于熔合线方向形成了粗大的柱状晶。另外,补焊前后接头原始焊缝区均以大角度晶界为主,使得该区域金属对裂纹扩展的阻碍能力增强。补焊后,焊接接头的抗拉强度及塑性指标都有明显的下降,但冲击韧性有所提高。
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张兵宪
杜明科
雷龙宇
张敏
张志强
关键词:  30CrMnSiA  焊接接头  补焊  显微组织  力学性能    
Abstract: Repair welding experiment was carried out for cracks that produced in the service process around 30CrMnSiA welding parts, which purpose of this was to reduce the enterprises' cost and avoid the waste of resources caused by the direct replacement of large structural parts in the maintenance process. The dependence relationship was established by comparison analysis with before and after repair welding around microstructure and properties that were characterized and analyzed with metallography, scanning electron microscopy(SEM), electron backscatter diffraction(EBSD), tensile, and impact and bending tests, which provided some theoretical support for the optimization of repair welding process around structural steel. Among them, HTJ-3 and HTG-1 electrodes were used to filling material during the test. The results showed that the martensitic and ferrite was found in the bottom welding layer before and after repair welding. And the coarse columnar crystals were formed along the direction perpendicular to the fusion line in the repair welding zone, which resulted from HTG-1 electrodes as the filler metal in repair welding process. In addition, the original welding zone of the joints before and after repair welding was dominated by high angle grain boundary, which can enhance the hindrance ability of metal in this area to crack propagation. Moreover, the tensile strength and plasticity indicator of the welded joints have been significantly declined after repairing welding, but the impact toughness has been improved.
Key words:  30CrMnSiA    welded joint    repair welding    microstructure    mechanical property
出版日期:  2023-08-25      发布日期:  2023-08-14
ZTFLH:  TG456.7  
基金资助: 国家自然科学基金(51974243);陕西省自然科学基础研究计划项目(2019JZ-31);陕西省教育厅自然科学专项(19JK0590)
通讯作者:  *张敏,西安理工大学材料科学与工程学院教授、博士研究生导师。1989年中国矿业大学工业与民用建筑专业本科毕业,1994年东北大学矿山建设工程专业硕士毕业,1997年西安交通大学焊接专业博士毕业后到西安理工大学工作至今。目前主要从事智能焊接技术及先进焊接材料等方面的研究工作,发表论文100余篇。zhmmn@xaut.edu.cn   
作者简介:  张兵宪,高级工程师,2001年7月、2009年5月分别于沈阳工业大学大学和西安理工大学大学获得工学学士学位和硕士学位。现为中航西安飞机工业集团股份有限公司高级工程师,目前主要研究领域为航空材料的研发与焊接。
引用本文:    
张兵宪, 杜明科, 雷龙宇, 张敏, 张志强. 补焊工艺对30CrMnSiA接头微观组织及性能的影响研究[J]. 材料导报, 2023, 37(16): 22020034-5.
ZHANG Bingxian, DU Mingke, LEI Longyu, ZHANG Min, ZHANG Zhiqiang. Research on the Influence of Repair Welding Process on Microstructure and Properties Around 30CrMnSiA Welded Joint. Materials Reports, 2023, 37(16): 22020034-5.
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http://www.mater-rep.com/CN/10.11896/cldb.22020034  或          http://www.mater-rep.com/CN/Y2023/V37/I16/22020034
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