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    含氢环境中X60管线钢的氢脆敏感性

    Hydrogen Embrittlement Sensitivity of X60 Pipeline Steel in Hydrogen-Containing Environment

    • 摘要: 采用氢渗透试验、慢应变速率试验、断裂韧性试验和疲劳裂纹扩展试验,研究了X60管线钢在无氢环境(常温、常压)和含氢(氢质量分数3%,总压6 MPa)环境中的氢脆敏感性。结果表明:X60钢组织主要为铁素体和珠光体;与无氢环境相比,在含氢环境中X60钢的抗拉强度、塑性、裂纹尖端张开位移和疲劳裂纹扩展速率均变化较小,X60钢发生氢脆的风险较低。

       

      Abstract: The hydrogen embrittlement susceptibility of X60 pipeline steel in hydrogen-free environment (normal temperature and pressure) and hydrogen-containing environment (hydrogen mass fraction of 3%, total pressure of 6 MPa) was studied by hydrogen permeation test, slow strain rate test, fracture toughness test and fatigue crack growth test. The results show that the microstructure of X60 steel was mainly composed of ferrite and pearlite. Compared with the hydrogen-free environment, the strength, plasticity, crack tip opening displacement and fatigue crack growth rate of X60 steel in the hydrogen-containing environment changed little, and the risk of hydrogen embrittlement was low for X60 steel.

       

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