齐丽华,牛靖,杨龙,冯耀荣,吉林康,熊庆人,张建勋

• 1:中国石油集团公司管材研究所
• 2:西安交通大学材料科学与工程学院

摘要(Abstract)：

通过SEM、TEM和相应的力学性能测试,研究X100级管线钢应变时效前后微观组织及其力学性能的变化。结果表明,在相同的温度、时间条件下时效,随着应变量的增加,针状铁素体和粒状贝氏体组织均发生形变,同时基体上的M/A组织周围形成高密度的位错,成为微裂纹的形核核心,并在温度时效的作用下导致间隙原子的偏聚。应变时效2%后,管体的拉伸强度虽没有较大变化但其均匀伸长率明显降低。应变时效后管体材料的冲击断口上二次裂纹增多,冲击韧性显著降低。

关键词(KeyWords)： X100管线钢;应变时效;微观组织;M/A组织

Abstract:

Keywords:

基金项目(Foundation): 中国博士后基金(18420006);; 省部级重大专项(2008A-300S)

作者(Author): 齐丽华,牛靖,杨龙,冯耀荣,吉林康,熊庆人,张建勋

DOI: 10.13289/j.issn.1009-6264.2011.02.014

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