Stability of retained austenite in a Nb microalloyed Mn-Si TRIP steel

被引：55
|
作者：
Bai, DQ
Di Chiro, A
Yue, S
机构：
[1] McGill Univ, Dept Engn Met, Montreal, PQ H3A 2B2, Canada
[2] Canadair, Montreal, PQ, Canada
来源：
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON MICROALLOYING IN STEELS | 1998年 / 284-2卷
关键词：
retained austenite; TRIP steel; stability;
D O I：
10.4028/www.scientific.net/MSF.284-286.253
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of thermomechanical processing on the volume fraction and stability of retained austenite in a Nb microalloyed Mn-Si TRIP steel was investigated. In one set of tests, specimens were isothermally held at 400 degrees C for a series of different times, then air cooled to room temperature. In another set of tests, specimens were continuously cooled to room temperature at a cooling rate of 2 degrees C/s or 10 degrees C/s. The former generated a mixed microstructure of ferrite + bainite + retained austenite, while the latter produced a microstructure of bainite + martensite + retained austenite. It was found that the stability of retained austenite against a strain induced transformation to martensite increases with increasing carbon concentration, decreasing size and hard surrounding phase.
引用
收藏
页码：253 / 260
页数：8
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