Nano-Scaled Fe3C Precipitates and Precipitation Strengthening in Hot Rolled Low Carbon High Strength Titanium Microalloyed Steel

被引：0

作者：

Wang, Jianfeng ^{[1
]}

Li, Guangqiang ^{[1
]}

Xiao, Aida ^{[1
]}

Fu, Jie ^{[1
]}

机构：

[1] Wuhan Univ Sci & Technol, Minist Educ, Key Lab Ferrous Met & Resources Utilizat, Wuhan 430081, Hunan, Peoples R China

来源：

ADVANCES IN SUPERALLOYS, PTS 1 AND 2 | 2011年 / 146-147卷

关键词：

nano-scaled precipitate; precipitation strengthening; chemical phase analysis; Ti microalloyed steel; BEHAVIOR; MICROSTRUCTURE; MO;

D O I：

10.4028/www.scientific.net/AMR.146-147.838

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hot rolled Ti microalloyed steel with polygonal ferrite and granular bainite microstructure and 640 MPa yield strength has been developed in BOF-CSP process. By chemical phase analysis, XRD, EDS and high resolution TEM, the particle size distribution, morphology, composition, crystal structure of precipitates were identified. Results revealed the steel containing Ti exhibits fine and uniformly distributed Fe3C-type carbides, the amount of M3C particles less than 18 nm in size was 0.2565 mass %. The high strength of steel is attributed to the precipitation strengthening effect of Fe3C, the yield strength increment from precipitation strengthening of Fe3C calculated according to the formula by Olson and Ashby-Orowan attained 234.4 MPa.

引用

页码：838 / 843

页数：6

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