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CHENG Fangjie, LIU Yang, GAO Wenbin, WANG Dongpo, LIU Yongliang, XU Wei. Analysis of sea test results of underwater wet multi-pass welding of DH36[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(4): 111-114. DOI: 10.12073/j.hjxb.20170426
Citation: CHENG Fangjie, LIU Yang, GAO Wenbin, WANG Dongpo, LIU Yongliang, XU Wei. Analysis of sea test results of underwater wet multi-pass welding of DH36[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(4): 111-114. DOI: 10.12073/j.hjxb.20170426
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Analysis of sea test results of underwater wet multi-pass welding of DH36

  • 1.

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;Tianjin Key Laboratory of Advanced Joining Technology, Tianjin 300072, China

  • 2.

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China

  • 3.

    Offshore Oil Engineering Co., Ltd.Tianjin 300452, China

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  • Received Date: March 20, 2015
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    • Abstract
  • In this paper, underwater wet manual multi-pass welding of different joint types was successfully completed through the diver welders after training. Butt joints in the flat position, lap joints in the horizontal and vertical positions, and T-joints in the vertical and flat positions were obtained under 11 m and 22 m water depths in the Bohai Sea. The test results indicate that all of the indexes of the joints welded at 11 m and 22 m water depths meet the requirements of the Class B Weld according to AWS D3.6 M: 2010. Compared with the joints welded at 11m water depth, the microstructures in the weld seam obtained at 22m depth have much more block ferrite and less amounts of acicular ferrite. The coarse-grained heat-affected zones of the joints at the two water depths are mainly composed of lath martensite.
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    • References (6)
  • Ketan Verma, Harish K Garg. Underwater welding-recent trends and future scope[J]. International Journal on Emerging Technologies, 2012, 3(2): 115-120.
    RoweM, Liu S. Recent developments in underwater wet welding. Science and Technology of Welding and Joining, 2001, 6(6): 387-395.
    胡家琨, 武传松, 贾传宝. 水下湿法焊条电弧焊接过程稳定性评价[J]. 焊接学报, 2013, 34(5): 99-102. Hu Jiakun, Wu Chuansong, Jia Chuanbao. Welding process stabil-ity evaluation of underwater wet manual metal arc welding[J]. Transactions of the China Welding Institution, 2013, 34(5): 99-102.
    程方杰, 胡生辉, 邓彩艳, 等. 水下焊条电弧焊扩散氢含量及焊缝组织特征分析[J]. 焊接学报, 2014, 35(5): 45-48. Cheng Fangjie, Hu Shenghui, Deng Caiyan, et al. Diffusible hydrogen content and microstructure characteris-tic in the joint by underwater shielded metal arc welding[J]. Transactions of the ChinaWelding Institution, 2014, 34(5): 45-48.
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