对以针状铁索体为主的X80管线钢进行不同工艺的热处理,分别得到具有多边形铁索体组织或板条马氏体组织的试样.研究了显微组织对不同试样在饱和H2S环境中的氢致裂纹(HIC)敏感性和氢渗透行为的影响.结果表明:具有不同显微组织的X80钢其HIC敏感性从大到小的排序为:1 水淬处理的板条马氏体组织试样,2 空冷处理的多边形铁索体组织试样,3 原始针状铁索体组织试样;氢在材料中的捕获效率是影响材料HIC敏感性的主要因素之一,渗氢通量J∞、氢扩散系数Deff越低,氢捕获效率越高,管线钢的氢致裂纹敏感性越高.
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