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304/304L不锈钢TIG焊两种搭接接头的组织及力学性能

金雪 朱平 李晗 秦兴元

金雪, 朱平, 李晗, 秦兴元. 304/304L不锈钢TIG焊两种搭接接头的组织及力学性能[J]. 机械科学与技术, 2018, 37(3): 456-460. doi: 10.13433/j.cnki.1003-8728.2018.0320
引用本文: 金雪, 朱平, 李晗, 秦兴元. 304/304L不锈钢TIG焊两种搭接接头的组织及力学性能[J]. 机械科学与技术, 2018, 37(3): 456-460. doi: 10.13433/j.cnki.1003-8728.2018.0320
Jin Xue, Zhu Ping, Li Han, Qin Xingyuan. Microstructure and Properties of Different TIG Lap Joint of 304/304L[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(3): 456-460. doi: 10.13433/j.cnki.1003-8728.2018.0320
Citation: Jin Xue, Zhu Ping, Li Han, Qin Xingyuan. Microstructure and Properties of Different TIG Lap Joint of 304/304L[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(3): 456-460. doi: 10.13433/j.cnki.1003-8728.2018.0320

304/304L不锈钢TIG焊两种搭接接头的组织及力学性能

doi: 10.13433/j.cnki.1003-8728.2018.0320
详细信息
    作者简介:

    金雪(1991-),硕士研究生,研究方向为金属结构焊接及疲劳性能,jinxue0927@sjtu.edu.cn

    通讯作者:

    朱平,教授,博士生导师,博士,pzhu@sjtu.edu.cn

Microstructure and Properties of Different TIG Lap Joint of 304/304L

  • 摘要: 搭接接头焊缝在实际工况中存在受拉力和剪切力两种受力状态,其力学性能的差异对工程应用中选取焊缝形式有重要意义。对不锈钢304及304L进行钨极惰性气体保护焊(TIG焊),研究了两种样件焊接接头的显微组织、硬度、拉伸性能和疲劳特性。结果表明:两种搭接形式下的焊接接头从母材到焊核,可根据晶粒类型和大小分为7个区域。焊缝受拉力样件的断裂延伸率为19.3%,在接头区域两种组织过渡处断裂;受剪切力样件的断裂延伸率为12.7%,在材料尺寸变化、应力集中处断裂。焊缝受拉力样件断裂韧性、抗拉强度和疲劳性能更强,结构尺寸变化和应力集中对受剪切力样件力学性能的影响较大。
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出版历程
  • 收稿日期:  2017-02-17
  • 刊出日期:  2018-03-05

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