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X80管线钢焊条电弧焊接头组织与耐蚀性分析

赵伟, 邹勇, 夏佃秀, 邹增大

赵伟, 邹勇, 夏佃秀, 邹增大. X80管线钢焊条电弧焊接头组织与耐蚀性分析[J]. 焊接学报, 2016, 37(10): 51-54.
引用本文: 赵伟, 邹勇, 夏佃秀, 邹增大. X80管线钢焊条电弧焊接头组织与耐蚀性分析[J]. 焊接学报, 2016, 37(10): 51-54.
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ZHAO Wei, ZOU Yong, XIA Dianxiu, ZOU Zengda. Analysis of microstructure and corrosion resistance of X80 pipeline steel welded by shielded metal arc welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(10): 51-54.
Citation: ZHAO Wei, ZOU Yong, XIA Dianxiu, ZOU Zengda. Analysis of microstructure and corrosion resistance of X80 pipeline steel welded by shielded metal arc welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(10): 51-54.
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X80管线钢焊条电弧焊接头组织与耐蚀性分析

  • 1.

    山东大学 材料液固结构演变与加工教育部重点实验室, 济南 250061;齐鲁工业大学 机械与汽车工程学院, 济南 250353

  • 2.

    山东大学 材料液固结构演变与加工教育部重点实验室, 济南 250061

  • 3.

    济南大学 机械工程学院, 济南 250022

基金项目: 国家自然科学基金面上资助项目（51271099）

Analysis of microstructure and corrosion resistance of X80 pipeline steel welded by shielded metal arc welding

  • 1.

    Key Laboratory for Liquid-solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China;School of Mechanical & Automotive Engineering, Qilu University of Technology, Jinan 250353, China

  • 2.

    Key Laboratory for Liquid-solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China

  • 3.

    School of Mechanical Engineering, University of Jinan, Jinan 250022, China

摘要

    摘要
  • 摘要: 利用双熔敷极焊条电弧焊技术对X80管线钢进行了焊接，并在焊接接头成分、组织及耐蚀性方面与传统焊条电弧焊进行了对比分析.结果表明，双熔敷极焊条电弧焊技术熔敷效率高，但受其结构及药皮重量系数的影响焊缝中合金元素的含量比普通焊接焊缝的低，且焊缝中多边形铁素体含量较高，另一方面由于对母材的热输入较低，使得其粗晶区组织较为细小，这有利于其性能的提高；对0.5 M Na2CO3-1 M NaHCO3溶液及通饱和CO2的NACE A溶液中的耐蚀性研究发现，焊缝及粗晶区耐蚀性均差于母材，且采用双熔敷极焊条电弧焊技术有利于提高焊缝及粗晶区的耐蚀性.
    Abstract: X80 pipeline steel was welded by twin electrode arc welding technology, and the composition, microstructure, corrosion resistance of welded joint were studied and compared with those of traditional arc welding. The deposition efficiency of twin electrode arc welding is higher than that of the traditional electrode arc welding, however, the concentration of alloying elements in welding material is lower because of the gravity coefficient of coating and its special structure. In addition, the concentration of polygonal ferrite is higher in welding material. What's more, the microstructure of CGHAZ is much finer because of the lower heat input for base material, which is beneficial to the promotion of the properties. The corrosion resistance of weld metal and CGHAZ is inferior to that of base metal in 0.5 M Na2CO3-1 M NaHCO3 solution and NACE A solution with saturated CO2. However, the twin electrode arc welding facilitates the corrosion resistance of weld metal and CGHAZ compared with the traditional arc welding.
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    • 参考文献(8)
  • [1] Jia Y Z, Wang J Q, Han E H, et al. Stress corrosion cracking of X80 pipeline steel in near-neutral pH environment under constant load tests with and without preload[J]. Journal of Materials Science & Technology, 2011, 27(11): 1039-1046.
    [2] Fu A Q, Cheng Y F. Electrochemical polarization behavior of X70 steel in thin carbonate/bicarbonate solution layers trapped under a disbonded coating and its implication on pipeline SCC[J]. Corrosion Science, 2010, 52: 2511-2518.
    [3] Zhang G A, Cheng Y F. Micro-electrochemical characterization and Mott-Schottky analysis of corrosion of welded X70 pipeline steel in carbonate/bicarbonate solution[J]. Electrochimica Acta, 2009, 55: 316-324.
    [4] Zhang G A, Cheng Y F. Micro-electrochemical characterization of corrosion of pre-cracked X70 pipeline steel in a concentrated carbonate/bicarbonate solution[J]. Corrosion Science, 2010, 52: 960-968.
    [5] Li D G, Feng Y R, Bai Z Q, et al. Photo-electrochemical analysis of passive film formed on X80 pipeline steel in bicarbonate/carbonate buffer solution[J]. Applied Surface Science, 2008, 254(9): 2837-2843.
    [6] 韩彬, 邹增大, 曲仕尧. 双电极焊条单弧焊的熔化特性Ⅰ.双电极焊条的加热和熔化[J]. 焊接学报, 2006, 27(3): 81-84. Han Bin, Zou Zengda, Qu Shiyao. Melting characteristic of twin electrode single arc welding Ⅰ. Heating and melting of twin electrode[J]. Transactions of the China Welding Institution, 2006, 27(3): 81-84.
    [7] 韩彬, 邹增大, 曲仕尧. 双电极焊条单弧焊的熔化特性Ⅱ.电弧对两焊芯熔化的自调节作用[J]. 焊接学报, 2006, 27(4): 61-64. Han Bin, Zou Zengda, Qu Shiyao. Melting characteristic of twin electrode single arc welding Ⅱ. Self-regulating effect of arc on two cores melting[J]. Transactions of the China Welding Institution, 2006, 27(4): 61-64.
    [8] 赵伟, 邹勇, 邹增大, 等. 双熔敷极耐磨堆焊焊条焊接稳定性的分析[J]. 焊接学报, 2013, 34(6): 25-28. Zhao Wei, Zou Yong, Zou Zengda, et al. Analysis on welding stability of twin deposition surfacing electrode[J]. Transactions of the China Welding Institution, 2013, 34(6): 25-28.
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  • 收稿日期:  2014-10-11

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