高级检索

永磁体磁场对铝合金电阻点焊力学性能及微观组织的影响

姚杞, 李洋, 罗震, 张禹

姚杞, 李洋, 罗震, 张禹. 永磁体磁场对铝合金电阻点焊力学性能及微观组织的影响[J]. 焊接学报, 2016, 37(4): 52-56.
引用本文: 姚杞, 李洋, 罗震, 张禹. 永磁体磁场对铝合金电阻点焊力学性能及微观组织的影响[J]. 焊接学报, 2016, 37(4): 52-56.
shu
YAO Qi, LI Yang, LUO Zhen, ZHANG Yu. Impact of external magnetic field generated by permanent magnet on mechanical property and microstructure of aluminum alloy resistance spot weld[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(4): 52-56.
Citation: YAO Qi, LI Yang, LUO Zhen, ZHANG Yu. Impact of external magnetic field generated by permanent magnet on mechanical property and microstructure of aluminum alloy resistance spot weld[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(4): 52-56.
shu

永磁体磁场对铝合金电阻点焊力学性能及微观组织的影响

  • 天津大学材料科学与工程学院, 天津 300072;高新船舶与深海开发装备协同创新中心, 上海 200240

基金项目: 国家自然科学基金资助项目(50975197,51275342)

Impact of external magnetic field generated by permanent magnet on mechanical property and microstructure of aluminum alloy resistance spot weld

  • School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;Collaborative Innovation Center of Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China

摘要

    摘要
  • 摘要: 文中采用永磁体作为磁场源,研究了外加稳定磁场对铝合金电阻点焊的熔核尺寸、焊点力学性能、断裂模式以及微观组织的影响.文中还对熔核直径与峰值载荷之间的关系进行了研究.结果表明,永磁铁的工作距离对熔核直径大小具有重要影响.距离越近,外磁场促进熔核直径增加的效果越明显.外加磁场能够有效增加焊点熔核直径、提高点焊接头的剪切拉伸强度、促进断裂模式由界面断裂向纽扣断裂转变.在不同工艺参数下,熔核直径增长在3.5%~14.1%,剪切拉伸力可提高4%~25%.外加磁场可促进点焊熔核内等轴晶的形成和细化.峰值载荷与熔核尺寸、工件厚度、母材极限抗拉强度的乘积具有良好的线性关系.
    Abstract: This paper systematically analyze the effect of external magnetic field (EMF) generated by permanent magnetic on the nugget size, mechanical properties and failure mode of aluminum alloy resistance spot welds. The relationship between nugget size and peak load was also studied. The results show that the work distance between two permanent magnets has significant effect on the nugget diameter. The smaller the distance is, the larger the nugget diameter is. The nugget diameter and tensile-shear force were increased under the help of EMF. Under different welding parameters, the nugget diameter can be increased by 3.5%~14.1%, and the tensile-shear force enhanced 4~25%. The EMF promotes the failure mode change from interfacial failure to pullout failure. The EMF can improve the strength-toughness properties and refine grain size. The relationship between peak load and the product of nugget diameter, workpiece thickness and base material ultimate tensile strength shows well linear relation.
    • HTML全文
    • 参考文献(9)
  • [1] Marya M, Gayden X. Development of requirements for resistance spot welding dual-phase (DP600) steels part 1-the causes of interfacial fracture[J]. Welding Journal, 2005, 84(11):172-182.
    [2] 江淑园, 郑晓芳, 陈焕明, 等. 外加磁场对CO2焊飞溅的控制机理[J]. 焊接学报, 2004, 25(3):65-67. Jiang Shuyuan, Zheng Xiaofang, Chen Huanming, et al. Outside magnetic field control to spatter of CO2 arc welding[J]. Transactions of the China Welding Institution, 2004, 25(3):65-67.
    [3] 罗键, 贾昌申, 王雅生, 等. 外加纵向磁场GTAW焊缝成形机理[J]. 焊接学报, 2001, 22(3):17-20. Luo Jian, Jia Changshen, Wang Yasheng, et al. Mechanism of longitudinal intermittent alternative magnetic field on weld formation in tungsten inert gas arc welding[J]. Transactions of the China Welding Institution, 2001, 22(3):17-20.
    [4] Popov V. Effect of the magnetic field on the formation of the joint in resistance spot welding[J]. Welding International, 1993, 7(11):905-907.
    [5] Watanabe Y, Takeda T, Sato H. Effect of magnetic field on weld zone by spot-welding in stainless steel[J]. ISIJ International, 2006, 46(9):1292-1296.
    [6] 张忠典, 王亚荣, 李双双. 外加径向恒定磁场改善高强钢点焊质量[C]//第十一次全国焊接会议论文集(第1册). 北京:机械工业出版社, 2005:406-409.
    [7] 沈琦, 李永兵, 陈关龙, 等. 永磁体磁场对双向高强钢电阻点焊质量的影响[J]. 焊接学报, 2011, 32(4):21-24. Shen Qi, Li Yongbing, Chen Guanlong, et al. Impact of external magnetic field generated by permanent magnet on quality of dual phase high strength steel by resistance spot welding[J]. Transactions of the China Welding Institution, 2011, 32(4):21-24.
    [8] Li Y B, Li Y T, Shen Q, et al. Magnetically assisted resistance spot welding of dual-phase steel[J]. Welding Journal, 2013, 92(4):124-132.
    [9] Chao Y J. Ultimate strength and failure mechanism of resistance spot weld subjected to tensile, shear, or combined tensile/shear loads[J]. ASME Journal of Engineering Materials and Technology, 2003, 125(4):125-132.
    • 相关文章
    • 施引文献
    • 资源附件(0)
计量
  • 文章访问数:  802
  • HTML全文浏览量:  35
  • PDF下载量:  384
  • 被引次数: 0
出版历程
  • 收稿日期:  2014-07-16

目录

摘要
HTML全文
    参考文献(9)
    相关文章
    施引文献
    资源附件(0)

    /

    返回文章
    返回

    网站版权 © 焊接杂志社焊接学报编辑部电话：0451-86323218地址：哈尔滨市松北区创新路2077号

    本系统由 北京仁和汇智信息技术有限公司 开发  百度统计