采用三点弯曲加载法,研究了国产X80管线钢及其焊接接头的抗H2S环境应力腐蚀开裂(SSCC)行为.结果表明,热影响区(HAZ)对应力腐蚀开裂最为敏感,主要是HAZ组织不均匀、晶粒粗大、硬度大,易引起局部腐蚀,从而导致该区SSCC敏感性高.母材的纵向和横向取样对H2S应力腐蚀不敏感,薄壁管材较厚壁管材有更好的H2S环境应力腐蚀抗力,
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