李明扬,刘雅政,周乐育,袁付春,朱涛,饶添荣

• 1:北京科技大学材料科学与工程学院
• 2:马钢股份有限公司技术中心

摘要(Abstract)：

通过两种成分非调质CT80连续油管用钢现场生产板卷工艺组织性能对比,分析了冷却速度、卷取温度、Mo和Nb元素含量等工艺参数对实验钢组织性能的影响。结果表明:当冷却速度由52℃/s提高到69℃/s后,铁素体形态为针状铁素体,实验钢屈服强度提高25 MPa;抗拉强度提高30 MPa。实验钢在530℃卷取时,组织中出现了3%的珠光体组织,抗拉强度低于性能指标10 MPa。而在400℃卷取时,组织中出现了3%的块状马氏体组织,使得屈服强度低于性能指标20 MPa;抗拉强度提高到690MPa。Mo元素含量提高,促进针状铁素体转变,实验钢淬透性提高,有利于获得M/A岛组织,保证获得高强度低屈强比性能。Nb元素含量提高,细晶强化和析出强化作用更明显。

关键词(KeyWords)： 连续油管;针状铁素体;显微组织

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 李明扬,刘雅政,周乐育,袁付春,朱涛,饶添荣

DOI: 10.13289/j.issn.1009-6264.2012.05.025

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