Development of cast high strength microalloyed steels

被引：2
|
作者：
Mandal, P [1 ]
Chakrabarti, D [1 ]
Ray, KK [1 ]
Chakrabarti, AK [1 ]
机构：
[1] Indian Inst Technol, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India
来源：
INTERNATIONAL JOURNAL OF CAST METALS RESEARCH | 2004年 / 17卷 / 02期
关键词：
high strength steels; microalloyed steels; heat treatment; tempering;
D O I：
10.1179/136404604225017465
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Cast microalloyed steels containing 1(.)25-1(.)3%Si and >2(.)0%Mn plus small quantities of nickel, chromium and microalloying elements (Nb, V, Ti) may be adequately strengthened by air cooling from 950degreesC. After a tempering treatment at 500-550degreesC, these low carbon (0.15-0.20%C) cast steels can exhibit YS 520725 MPa, UTS 690-820 MPa, 20-40% El and impact toughness up to 30 J at -40degreesC. The air cooled microstructures in these steels consist of precipitation strengthened ferrite+ bainite. The tempering treatment induces transformation of retained austenite to pearlite and improves mechanical properties. (C) 2004 W. S. Maney Son Ltd.
引用
收藏
页码：89 / 93
页数：5
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