Novel method for refinement of retained austenite in micro/nano-structured bainitic steels

被引：11

作者：

Hu, F. ^{[1
]}

Wu, K. M. ^{[1
]}

Wan, X. L. ^{[1
]}

Rodionova, I. ^{[2
]}

Shirzadi, A. A. ^{[1
,3
]}

Zhang, F. C. ^{[4
]}

机构：

[1] Wuhan Univ Sci & Technol, Int Res Inst Steel Technol, State Key Lab Refractories & Met, Wuhan, Peoples R China

[2] IP Bardin Cent Res Inst Ferrous Met, CMPC Ctr, Moscow, Russia

[3] Univ Cambridge, Dept Mat Sci & Met, Cambridge, England

[4] Yanshan Univ, Natl Engn Res Ctr Equipment & Technol Cold Strip, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2017年 / 33卷 / 11期

基金：

中国国家自然科学基金; 英国工程与自然科学研究理事会;

关键词：

Retained austenite; austenite refinement; quenching and partitioning; two-stage bainitic transformation; micro/nano-structured bainitic steel; LOW-TEMPERATURE BAINITE; TRANSFORMATION; CARBON; MARTENSITE; FERRITE; PLATES;

D O I：

10.1080/02670836.2017.1291165

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A comparative study was conducted to assess the effects of two different heat treatments on the amount and morphology of the retained austenite in a micro/nano-structured bainitic steel. The heat treatments used in this work were two-stage bainitic transformation and bainitic-partitioning transformation. Both methods resulted in the generation of a multi-phase microstructure containing nanoscale bainitic ferrite, and/or fresh martensitic phases and much finer retained austenite. Both heat treatments were verified to be effective in refining the retained austenite in micro/nano-structured bainite and increasing the hardness. However, the bainitic transformation followed by partitioning cycle was proved to be a more viable approach than the two-stage bainitic transformation due to much shorter processing time, i.e. similar to 2h compared to similar to 4 day, respectively.

引用

页码：1360 / 1365

页数：6

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