ISSN:1003-8620

CN:42-1243/TF

Governed by: CITIC Pacific Special Steel Group Co., LTD

Sponsored by: Daye Special Steel Co., LTD.

Special Steel ›› 2025, Vol. 46 ›› Issue (3): 117-124.DOI: 10.20057/j.1003-8620.2024-00248

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Study on the Effects of Partial Pressure on X52M Pipeline Hydrogen Embrittlement Properties in High-Pressure Hydrogen Environments

Zhao Qian1, Liu Haixiao2, Li Ming2, Wang Bing1, Li Ba1, Jia Shujun1, Liu Qingyou1   

  1. (1 Engineering Steel Institute, Central Iron and Steel Research Institute, Beijing, 100081, China;2 SINOPEC Engineering Incorporation, Beijing, 100101, China)
  • Received:2024-10-12 Online:2025-05-30 Published:2025-06-01

高压氢环境下不同氢分压对X52M钢管氢脆性能影响

赵乾1, 刘海潇2, 李明2, 汪兵1, 李拔1, 贾书君1, 刘清友1   

  1. (1 钢铁研究总院有限公司工程用钢研究院,北京 100081;2 中国石化工程建设有限公司,北京 100101)
  • 作者简介:赵乾(1980—),男,博士研究生, 高级工程师

Abstract: In pure hydrogen pipeline systems, the transmission pressure is critical for ensuring both efficient operation and safety performance. Through the slow tensile and fatigue life tests under high pressure gas phase environment, the influence law of plasticity and fatigue life properties under different hydrogen partial pressure on X52M pipeline steel (mass fraction /%: 0.04C,0.98Mn,0.010P,0.001S,0.033Nb,0.033V,0.16Cr,0.014Ti) were contrastive studied, Various characterization techniques, including metallographic microscopy and scanning electron microscopy (SEM), were utilized to examine the microstructural evolution and fracture mechanisms. The results indicated that the loss rate of slow tensile section shrinkage increased significantly with the increasing of hydrogen partial pressure, the ductility loss was measured to be 10.5%, 17.5%, and 28.5% under 4 , 6 ,10 MPa hydrogen pressure, respectively. Furthermore, hydrogen partial pressure significantly impacted the fatigue life of the material. A substantial increase in fatigue life reduction from 37.1% to 63.1% was observed when the hydrogen pressure was raised from 6 MPa to 10 MPa, indicating a heightened susceptibility to hydrogen embrittlement. The increase in the partial pressure of hydrogen leads to more hydrogen-induced cracks, which are difficult to crack in the hydrogen environment, and eventually leads to more serious hydrogen brittlement of the material. The test results can be used as an important reference basis for hydrogen transmission pipeline design and safe operation.

Key words:  , Hydrogen Transportation Pipeline; High-pressure Hydrogen; Gas Transportation Pressure; Slow Tensile; Fatigue Life

摘要: 纯氢管道输送压力对管道工程的运行效率和安全至关重要。通过高压气相环境下的慢拉伸和疲劳寿命试验,对比研究了不同氢分压对X52M(质量分数/%:0.04C,0.98Mn,0.010P,0.001S,0.033Nb,0.033V,0.16Cr,0.014Ti)管线钢的塑性、疲劳等性能影响规律,并采用金相显微镜、扫描电子显微镜等多种表征技术对材料组织和断裂行为进行了微观机理分析。结果表明,随着氢分压增加,慢拉伸断面收缩率的损失率明显增大,4、6、10 MPa下的损失率分别为10.5%、17.5%、28.5%。氢分压对材料疲劳寿命也有显著影响,当氢分压从6 MPa上升到10 MPa后,疲劳寿命损失率从37.1%大幅增加到63.1%,氢脆敏感性大幅增加。氢分压的增加导致更多的氢致裂纹生成,在氢环境中裂纹难以止裂,最终导致材料氢脆现象更为严重。试验成果可作为氢气输送管道设计与安全运营的重要参考依据。

关键词: 输氢管道, 高压氢, 输送压力, 慢拉伸, 疲劳寿命

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