Tempering stability of retained austenite in nanostructured dual phase steels

被引：13
|
作者：
Hu, F. [1 ]
Wu, K. M. [1 ]
Hou, T. P. [1 ]
Shirzadi, A. A. [2 ,3 ]
机构：
[1] Wuhan Univ Sci & Technol, Int Res Inst Steel Technol, Wuhan 430081, Peoples R China
[2] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England
[3] Open Univ, Dept Engn & Innovat, Milton Keynes MK7 6AA, Bucks, England
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2013年 / 29卷 / 08期
关键词：
Superbainitic steels; Quenching-partitioning martensitic steels; Tempering; Microstructure; LOW-TEMPERATURE BAINITE; MARTENSITE-TRANSFORMATION; HEAT-TREATMENT; CARBON; FERRITE;
D O I：
10.1179/1743284713Y.0000000227
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The tempering resistance and stability of retained austenite in superbainitic and quenchingpartitioning martensitic steels were investigated over the temperature range of 400 to 700 degrees C. The X-ray diffraction analysis and hardness tests showed that the quenching-partitioning martensitic steel contained a considerable amount of retained austenite (26.6 vol.-%) and had a relatively high hardness up to 556 HV1 after tempering at similar to 600 degrees C. In contrast, the fraction of retained austenite and hardness of superbainitic steel were considerably lower (24.5 vol.-% and 385 HV1) after the same tempering cycle. The present work also showed that the quenching-partitioning steel had a higher tempering stability, probably due to the higher fraction of carbon rich retained austenite.
引用
收藏
页码：947 / 953
页数：7
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