材料科学与工程学报2011，Vol.29Issue(3)：386-391,6.
高钢级X100管线钢的组织与性能
Microstructure and Mechanical Properties of Pipeline Steel X100
曾明 1江海涛 1胡水平 1赵征志1
作者信息
- 1. 北京科技大学高效轧制国家工程研究中心,北京100083
- 折叠
摘要
Abstract
Microstructural constituents as well as distribution of precipitates in pipeline steel X100 produced by thermo mechanical control process (TMCP) technology were investigated by means of optical microscopy, scanning electron microscopy, transmission electron microscopy, etc. Results show that X100 is polyphase-structured steel which is mainly constituted of GB (granular bainite)、 BF (bainite ferrite)、 M/A (martensite-austensite), conformation and proportion of each phase have significant influence on the performances of X100. It is proved that GB based structure with a few BF and dispersed fine M/A inside has excellent effects on strength and toughness. High density of dislocations, bainite lathes with different orientations and M/A hardening phase were found by means of TEM observation. It also found two types of precipitate, one with big size mainly constitute of Ti, the other with small size mainly constitute of Nb; each type of precipitate have big effects on hindering the recrystallization of austenite and on the precipitation strengthening.关键词
X100管线钢/复相组织/高密度位错/析出物Key words
pipeline steel X100/ polyphase/ high density of dislocations/ precipitate分类
矿业与冶金引用本文复制引用
曾明,江海涛,胡水平,赵征志..高钢级X100管线钢的组织与性能[J].材料科学与工程学报,2011,29(3):386-391,6.
