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MULTI-COMPONENT MICRO-ALLOYED AIR COOLING BAINITIC STEELS |
LI Fengzhao;GU Yingni;JIANG Jiang;AO Qing;SUN Dongsheng (College of Materials Science and Engineering; Shandong University of Technology; Jinan 250061) |
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Cite this article:
LI Fengzhao;GU Yingni;JIANG Jiang;AO Qing;SUN Dongsheng (College of Materials Science and Engineering; Shandong University of Technology; Jinan 250061). MULTI-COMPONENT MICRO-ALLOYED AIR COOLING BAINITIC STEELS. Acta Metall Sin, 1997, 33(5): 492-498.
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Abstract Medium carbon and medium-high carbon air cooling micro-alloyed bainitic steels of Mn-Si-B system have been studied. The main structure is bainite or bainite/martensite after forging and air cooling, and there are carbides and a small amount of retained austenite. The structure is fine and uniform, and the addition of micro-amount elements can further refine the austenite grain and the bainitic structure.By modified treatments of mono, binary and ternary micro-alloying, the structures of various grades can be obtained, and their hardness, toughness and wear resistance increase successively. The structure of the air cooling bainitic steels with medium high carbon treated by ternary micro-alloyed after forging and tempering or nomalizing and tempering is much finer, the properties are much superior.
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Received: 18 May 1997
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1 Irvine K J,Pickering F B.J Iron Steel Inst,1957;87:292 2 Bhadeshia H K O H.Bainite in Steels.London:the Institute of Materials,1992:348,380 3刘晓,张明星,陈大明,周鹿宾,康沫狂.金属学报,1993;29:A97 4赵如发,方鸿生,郑燕康,陈秀云.中国专利 86 103 009,1987 5方鸿生,郑燕康,陈秀云,黄云庆,曹建军,姜忠良.中国机械工程学会第二届材料年会论文集,1990:11,115 |
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