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The Analysis of Low Temperature Toughness on X80 Pipeline Steel Welded Joint

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Abstract

Aiming at the security problems of pipeline steel application, the different positions of the welded joints of circumferentially welding pipeline of X80 steel were investigated by microstructure observation, the hardness, Charpy impact toughness and crack tip opening displacement (CTOD) test at low temperature. The Vickers hardness test results show that there are local softened regions in heat-affected zone (HAZ). Charpy impact test indicate that the ductile–brittle transition temperature of weld is below − 60 °C, the ductile–brittle transition temperature of HAZ is around − 38 °C. CTOD test reveal that the fracture toughness of HAZ shows a large fluctuation since it is in the ductile–brittle transition temperature regime.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Southwest Petroleum University, Chengdu, 610500, China

    Bin Wang, Yingchao Xu, Jing Hu, Senfeng Zhang, Chengwu Cui & Hongxia Lan

  2. Sichuan Provincial Research Center of Welding Engineering Technology, Chengdu, 610500, China

    Bin Wang

Authors
  1. Bin Wang
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  2. Yingchao Xu
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  3. Jing Hu
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  4. Senfeng Zhang
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  5. Chengwu Cui
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  6. Hongxia Lan
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Corresponding author

Correspondence to Yingchao Xu.

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Wang, B., Xu, Y., Hu, J. et al. The Analysis of Low Temperature Toughness on X80 Pipeline Steel Welded Joint. Trans Indian Inst Met 71, 2517–2526 (2018). https://doi.org/10.1007/s12666-018-1382-0

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  • DOI: https://doi.org/10.1007/s12666-018-1382-0

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