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X52管线钢水下摩擦圆锥塞焊接头组织特征

熊俊珍, 杨新岐, 林伟, 刘凯旋

熊俊珍, 杨新岐, 林伟, 刘凯旋. X52管线钢水下摩擦圆锥塞焊接头组织特征[J]. 焊接学报, 2019, 40(5): 6-12. DOI: 10.12073/j.hjxb.2019400119
引用本文: 熊俊珍, 杨新岐, 林伟, 刘凯旋. X52管线钢水下摩擦圆锥塞焊接头组织特征[J]. 焊接学报, 2019, 40(5): 6-12. DOI: 10.12073/j.hjxb.2019400119
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XIONG Junzhen, YANG Xinqi, LIN Wei, LIU Kaixuan. Microstructural features of underwater wet friction taper plug welded joints for X52 pipeline steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(5): 6-12. DOI: 10.12073/j.hjxb.2019400119
Citation: XIONG Junzhen, YANG Xinqi, LIN Wei, LIU Kaixuan. Microstructural features of underwater wet friction taper plug welded joints for X52 pipeline steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(5): 6-12. DOI: 10.12073/j.hjxb.2019400119
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X52管线钢水下摩擦圆锥塞焊接头组织特征

  • 天津大学, 天津 300072

基金项目: 国家自然科学基金资助项目（51475327）

Microstructural features of underwater wet friction taper plug welded joints for X52 pipeline steel

  • Tianjin University, Tianjin 300072, China

摘要

    摘要
  • 摘要: 对X52管线钢进行了水下摩擦圆锥塞焊工艺试验，对不同焊接工艺参数下接头的微观组织进行了金相显微镜及扫描电镜观测，探讨了工艺参数对X52管线钢水下摩擦圆锥塞焊接头组织的影响. 结果表明，接头可以分为锻造区、最终摩擦界面、剪切变形区、结合区及热影响区. 其中剪切变形区呈层状结构，所形成的焊缝微观组织极不均匀，且出现粗大晶粒. 相比于焊接转速，轴向压力对X52管线钢水下摩擦塞焊接头组织的影响更显著. 摩擦塞焊接头组织与传统摩擦焊接头晶粒细化的特征不同，这是由于在“封闭式”摩擦焊过程中塞焊缝主要由剪切变形区组成.
    Abstract: The experiments of underwater wet friction taper plug welding were performed on API 5L X52 pipeline steel. The microstructure of joints with different welding parameters was observed by optical and scanning electron microscope, and the effects of welding parameters on microstructure were analyzed. The results show that the joints can be divided into forged zone (FZ), final frictional plane (FFP), shear deformation zone (SDZ), bonding zone (BZ) and heat-affected zone (HAZ). The SDZ presents layered structure containing coarse grains,and the microstructure of welds is extremely inhomogeneous. The axial force has a greater impact on microstructure of welds compared with rotational speed. The microstructure of underwater wet friction taper plug welded joint has a big difference with that of traditional friction welded joints which is characterized by fine-grained microstructure. These behaviors are caused by the welds mainly consisting of shear deformation zone during "closed mode" friction welding.
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    • 参考文献(11)
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  • 收稿日期:  2018-04-29

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