Nanostructured martensite-austenite dual phase steels

被引：3
|
作者：
Hu, F. [1 ]
Wu, K. M. [1 ]
Misra, R. D. K. [2 ]
机构：
[1] Wuhan Univ Sci & Technol, Int Res Inst Steel Technol, Wuhan 430081, Peoples R China
[2] Univ Louisiana Lafayette, Ctr Struct & Funct Mat, Lafayette, LA 70504 USA
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2012年 / 28卷 / 11期
关键词：
Microstructure; Hardness; Martensite; Bainite; Dual phase steels; PARTITIONING-TEMPERING PROCESS; LOW-TEMPERATURE BAINITE; HIGH-STRENGTH STEEL; MECHANICAL-PROPERTIES; HEAT-TREATMENT; CARBON; TRANSFORMATION; FERRITE;
D O I：
10.1179/1743284712Y.0000000068
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanostructured martensite-austenite microstructure was achieved by a quenching-partitioning-tempering (Q-P-T) treatment of high carbon low temperature bainitic steel. Microstructure observations showed that the nanostructured steel consisted of fine martensite (about 25 nm in thickness), retained austenite and carbides. X-ray diffraction analysis indicated that carbon was partitioned into austenite after martensite transformation. High hardness (about 655 HV1) and relatively high retained austenite fraction (0.36-0.41) was attained. The heat treatment times were greatly reduced, nearly equal or higher hardness and retained austensite fraction were achieved by Q-P-T treatment, compared with low temperature super bainite process.
引用
收藏
页码：1314 / 1319
页数：6
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