| Q235钢搅拌摩擦焊接头微观组织与力学性能分析 |
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| 引用本文： | 周利,张仁晓,舒凤远,黄永宪,冯吉才.Q235钢搅拌摩擦焊接头微观组织与力学性能分析[J].焊接学报,2019,40(3):80-84. |
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| 作者姓名： | 周利 张仁晓 舒凤远 黄永宪 冯吉才 |
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| 作者单位： | 哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001;哈尔滨工业大学(威海)山东省特种焊接技术重点实验室,威海264209;哈尔滨工业大学(威海)山东省特种焊接技术重点实验室,威海,264209;哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨,150001 |
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| 基金项目： | 山东省自然科学基金资助项目(ZR2016EEM43，ZR2016EEQ03)；山东省重大科技创新工程项目(2017CXGC0811) |
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| 摘 要： | 在焊接速度为100 mm/min和搅拌头转速为450 r/min的工艺参数下，采用钨铼合金搅拌头对3 mm厚Q235钢进行了搅拌摩擦焊试验，并对接头的微观组织及力学性能进行了研究. 结果表明，在该工艺参数下可以获得表面无缺陷、成形良好的焊缝. 焊后搅拌头表现出一定程度的磨损及氧化. 接头截面各区域承受不同的热力联合作用，经历了不同的组织转变过程，但均保持铁素体和珠光体组织. 接头显微硬度最大值位于焊核区. 接头拉伸断裂位置处于热影响区，拉伸断口呈韧性断裂特征.
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| 关 键 词： | Q235钢 搅拌摩擦焊 微观组织 力学性能 |
| 收稿时间： | 2018/1/10 0:00:00 |
Microstructure and mechanical properties of friction stir welded joint of Q235 steel |
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| ZHOU Li,ZHANG Renxiao,SHU Fengyuan,HUANG Yongxian,FENG Jicai.Microstructure and mechanical properties of friction stir welded joint of Q235 steel[J].Transactions of The China Welding Institution,2019,40(3):80-84. |
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| Authors: | ZHOU Li ZHANG Renxiao SHU Fengyuan HUANG Yongxian FENG Jicai |
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| Affiliation: | 1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;2. Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China |
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| Abstract: | 3 mm thick Q235 steel was friction stir welded using W-Re pin tool at traverse speed of 100 mm/min and tool rotational speed of 450 r/min. The microstructure and mechanical properties of joints were analyzed. The well formed joint without surface defects could be obtained. Tool wear and oxidation occurred after welding. Four distinct zones were identified in the joint cross-section, which experienced different microstructural evolution but all consisted of ferrite and pearlite. The highest microhardness was located in the WNZ. The fracture of joint located at HAZ during tensile test with ductile fracture mode. |
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| Keywords: | Q235 steel|friction stir welding|microstructure|mechanical properties |
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