| 不锈钢母材及其焊缝金属材料单拉本构关系研究 |
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| 引用本文： | 李志林, 杨璐, 崔瑶, 尹飞, 梁耀华. 焊接工艺对不锈钢角焊缝连接试件力学性能影响研究[J]. 工程力学, 2021, 38(2): 179-186, 210. DOI: 10.6052/j.issn.1000-4750.2020.04.0232 |
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| 作者姓名： | 李志林 杨璐 崔瑶 尹飞 梁耀华 |
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| 作者单位： | 1.北京工业大学，城市与工程安全减灾教育部重点实验室，北京 100124;2.北京工业大学，北京市高层和大跨度预应力钢结构工程技术研究中心，北京 100124;3.大连理工大学海岸和近海工程国家重点实验室，辽宁， 大连 116024 |
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| 基金项目： | 国家自然科学基金优秀青年科学基金项目(51922001)；国家自然科学基金创新研究群体项目(51421005) |
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| 摘 要： | 对12个奥氏体型及12个双相型不锈钢正面角焊缝和侧面角焊缝连接试件进行了单调拉伸试验，考察了不同焊接工艺对角焊缝连接力学性能的影响。结果表明：采用氩弧焊焊接工艺的不锈钢角焊缝试件破坏面与电弧焊焊接工艺的试件破坏面形状相差较大，后者破坏面更加光滑；同时由于受到复杂应力的作用，正面角焊缝试件的真实破坏角度并不为相关规范规定的理论值45°；对于奥氏体型不锈钢角焊缝，氩弧焊试件与电弧焊试件的强度比分别为1.03 (正面角焊缝试件)及1.13 (侧面角焊缝试件)，相对变形量之比为1.46及1.11；而对于双相型不锈钢角焊缝，两者的强度比分别为1.12和1.04，相对变形量之比为1.66及1.45；氩弧焊试件表现出了更好的力学性能。对于两种不锈钢材料，正面角焊缝强度均远大于侧面角焊缝的强度，建议在工程设计和相关规范的编制/修订中考虑正面角焊缝强度提高的影响。
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| 关 键 词： | 不锈钢 角焊缝连接件 氩弧焊 电弧焊 力学性能 |
| 收稿时间： | 2020-04-15 |
| 修稿时间： | 2020-08-30 |
Experimental study on residual stresses in cold rolled austenitic stainless steel hollow sections |
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| LI Zhi-lin, YANG Lu, CUI Yao, YIN Fei, LIANG Yao-hua. INVESTIGATION ON THE INFLUENCE OF WELDING PROCESSESON MECHANICAL PROPERTIES OF STAINLESS STEELFILLET WELD CONNECTIONS[J]. Engineering Mechanics, 2021, 38(2): 179-186, 210. DOI: 10.6052/j.issn.1000-4750.2020.04.0232 |
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| Authors: | LI Zhi-lin YANG Lu CUI Yao YIN Fei LIANG Yao-hua |
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| Affiliation: | 1.The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China;2.Beijing Engineering Research Centre of High-Rise and Large-Span Prestressed Steel Structures, Beijing University of Technology, Beijing 100124, China;3.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China |
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| Abstract: | In order to study the effect of different welding processes on mechanical properties of stainless steel fillet weld connections, the monotonic tensile tests of 12 austenitic and 12 duplex stainless steel specimens were carried out. The results show that the failure surface of specimens made by TIG (Tungsten Inert Gas Welding) is quite different from that of specimens made by SMAW (Shielded Metal Arc Welding), and the latter is much smoother. Besides, the true failure angle of the transverse fillet weld connections is not the theoretical value of 45° due to the influence of the complex stress. For austenitic stainless steel, the strength ratios of specimens made by TIG to SMAW are 1.03 (for transverse fillet weld connections) and 1.13 (for longitudinal fillet weld connections), and the ratios of relative deformation are 1.46 and 1.11. For duplex stainless steel, the strength ratios are 1.12 and 1.04, meanwhile the relative deformation ratios are 1.66 and 1.45. The connections made by TIG show better mechanical properties. For the two stainless steel, the strengths of transverse fillet weld connections are much better than those of the longitudinal fillet weld connections, so it is suggested that the influence of the increase of the strength of transverse fillet weld connections be taken into account in the compilation or revision of the related specifications. |
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| Keywords: | stainless steel fillet weld connection TIG (tungsten inert gas arc welding) SMAW (shielded metal arc welding) mechanical properties |
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