Microstructures and properties of direct-cooled microalloy forging steels

被引:141
作者
Matlock, DK [1 ]
Krauss, G [1 ]
Speer, JG [1 ]
机构
[1] Colorado Sch Mines, Adv Steel Proc & Prod Res Ctr, Golden, CO 80401 USA
关键词
non-traditional bainite; retained austenite; strength toughness;
D O I
10.1016/S0924-0136(01)00792-0
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In comparison to conventionally processed quenched-and-tempered steels, direct-cooled microalloy steels offer the potential for significant cost savings. However, direct material substitutions have often been limited based on toughness considerations at the required hardness levels. In an effort to improve toughness, direct-cooled microalloyed forging steels have evolved from precipitation strengthened ferrite-pearlite steels to steels with non-traditional bainitic microstructures that may contain a significant amount of retained austenite. As a consequence of recent developments, the use of direct-cooled microalloyed steels has increased and there is current interest in the use of these steels processed to obtain higher hardness levels. In this paper, processing approaches for the production of direct-cooled forging steels are considered with an emphasis on features that control strength and toughness. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:324 / 328
页数:5
相关论文
共 23 条
[1]  
Aloi N.E., 1994, THESIS COLORADO SCH
[2]  
ALOI NE, 1994, 940787 SAE
[3]  
ALOI NE, 1994, P 36 ISS MECH WORK S, P201
[4]  
BAILEY AJ, 1996, P 37 MECH WORK STEEL, P455
[5]  
Banerji SK., 1986, FUNDAMENTALS MICROAL, P389
[6]  
BHADESHIA HKD, 1992, BAINITE STEELS TRANS, P295
[7]   The bainite transformation: unresolved issues [J].
Bhadeshia, HKDH .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1999, 273 :58-66
[8]  
BRANDT ML, 1993, IRON STEELMAKER, V20, P55
[9]  
GLADMAN T, 1997, PHYSICAL METALLURGY, P345
[10]  
Grassi KJ, 1989, 890508 SAE