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闫飞, 周一凡, 唐本刊, 胥永刚, 王春明. 基于磁控冶金的铝/钢异种金属焊接特性[J]. 焊接学报, 2022, 43(5): 98-103. DOI: 10.12073/j.hjxb.20220101004
引用本文: 闫飞, 周一凡, 唐本刊, 胥永刚, 王春明. 基于磁控冶金的铝/钢异种金属焊接特性[J]. 焊接学报, 2022, 43(5): 98-103. DOI: 10.12073/j.hjxb.20220101004
YAN Fei, ZHOU Yifan, TANG Benkan, XU Yonggang, WANG Chunming. Welding characteristics of Al/steel dissimilar metals based on magnetically controlled metallurgy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2022, 43(5): 98-103. DOI: 10.12073/j.hjxb.20220101004
Citation: YAN Fei, ZHOU Yifan, TANG Benkan, XU Yonggang, WANG Chunming. Welding characteristics of Al/steel dissimilar metals based on magnetically controlled metallurgy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2022, 43(5): 98-103. DOI: 10.12073/j.hjxb.20220101004

基于磁控冶金的铝/钢异种金属焊接特性

Welding characteristics of Al/steel dissimilar metals based on magnetically controlled metallurgy

  • 摘要: 预置纵向交变磁场对铝/钢异种材料进行激光搭接深熔焊试验,采用金相显微镜、扫描电镜等分析方法研究交变磁场对接头宏观形貌、显微组织、元素分布、力学性能及其断裂方式的影响. 结果表明,外加交变磁场作用下铝/钢接头焊缝的熔宽减小、熔深增加. 交变磁场诱导焊缝熔池中产生的电磁力促使界面层形成的IMCs由连续分布转向离散分布,成分偏析和裂纹缺陷得到抑制. 界面层IMCs可能由ζ-FeAl2,θ-FeAl3和β2-FeAl组成. 与未加磁场相比,外加磁场辅助激光焊接可以提高接头的载荷能力,这主要归功于结合面积的增加与焊缝IMCs组织的细化.

     

    Abstract: Laser lap deep penetration welding was conducted on Al/steel dissimilar metals with longitudinal alternating magnetic field. Effects of alternating magnetic field on the macro-morphology, microstructure, element distribution, mechanical properties and fracture mode of the joints were carefully investigated using metallographic microscope, scanning electron microscope and other methodologies. The results showed that the weld width decreased and the weld depth increased under applied alternating magnetic field. The electromagnetic force induced by an alternating magnetic field promoted the transformation of resultant IMCs at interface from continuous distribution to discrete distribution. During this process, composition segregation and crack defects were also successfully suppressed. IMCs in interfacial layer may be composed of ζ-FeAl2, θ-FeAl3 and β2-FeAl. Laser welding with applied external magnetic field can improve the loading capacity of the joint. It can attribute to the increase of combined areas and refinement of IMCs structure.

     

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