Ductility and formability of newly developed high strength low alloy TRIP-aided sheet steels with annealed martensite matrix

被引：111

作者：

Sugimoto, K ^{[1
]}

Kanda, A

Kikuchi, R

Hashimoto, S

Kashima, T

Ikeda, S

机构：

[1] Shinshu Univ, Dept Mech Syst Engn, Nagano 3808553, Japan

[2] Shinshu Univ, Grad Sch, Nagano 3808553, Japan

[3] Kobe Steel Ltd, Kakogawa Works, Kakogawa 6750023, Japan

[4] Kobe Steel Ltd, Mat Res Lab, Nishi Ku, Kobe, Hyogo 6512271, Japan

来源：

ISIJ INTERNATIONAL | 2002年 / 42卷 / 08期

关键词：

microstructure; ductility; formability; TRIP; high-strength steel; annealed martensite; retained; austenite;

D O I：

10.2355/isijinternational.42.910

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Formable high-strength low-alloy TRIP-aided sheet steels with annealed martensite matrix or "TRIP-aided annealed martensitic steel" were developed for automotive applications. The steels possessed a large amount of plate-like retained austenite along annealed martensite lath boundary, whose stability against the strain-induced transformation was higher than that of the conventional "TRIP-aided dual-phase steel" with polygonal ferrite matrix. In a tensile strength range between 600 and 1000 MPa, the TRIP-aided annealed martensite steels exhibited a superior large elongation and reduction of area. In addition, they possessed the same excellent stretch-flangeability and bendability as "TRIP-aided bainitic steel" with bainitic ferrite matrix. These properties were discussed by matrix structure, a strength ratio of second phase to matrix, retained austenite stability, internal stress and so on.

引用

页码：910 / 915

页数：6

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