Ultrahigh strength hot rolled microalloyed steels: microstructural aspects of development

被引：78
|
作者：
Misra, RDK
Weatherly, GC
Hartmann, JE
Boucek, AJ
机构：
[1] LTV Steel Technol Ctr, Independence, OH 44131 USA
[2] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 4M1, Canada
[3] LTV Steel Indiana Harbor Works, E Chicago, IN 46312 USA
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2001年 / 17卷 / 09期
关键词：
D O I：
10.1179/026708301101511040
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ultrahigh strength hot rolled microalloyed steels of yield strength 690 and 760 MPa with ferrite - bainite microstructure have been developed. Impact toughness of similar to 135 J at -40 degreesC and a ductile-brittle transition temperature of less than approximately -70 degreesC have been obtained in steels of gauge similar to3 mm. The attractive strength - toughness combination was achieved by applying microalloying concepts and controlled rolling in an interactive manner. Alloy design aspects are qualitatively described in relation to the contributions of solute, grain size, precipitates, and microstructural constituents.
引用
收藏
页码：1119 / 1129
页数：11
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