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

被引：56

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

页码：253 / 260

页数：8

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