高石,蔡庆伍,余伟,刘涛,潘学福

• 1:北京科技大学冶金工程研究院

摘要(Abstract)：

研究了终冷温度和等温时间对中低碳纳米贝氏体钢显微组织演变的影响。结果表明,实验钢采用缓冷至低于Ms0温度后等温工艺,可获得纳米贝氏体钢。随着终冷温度降低,贝氏体增多,残留奥氏体的含量先升高后降低,300℃终冷,组织中未转变奥氏体大量转变为贝氏体,残留奥氏体减少,贝氏体板条最细,可达200~300 nm;300℃等温,随着等温时间增加,碳含量不同的未转变奥氏体,在低于实验钢Ms0温度高于未转变奥氏体Ms'温度时,相继发生贝氏体转变,组织中贝氏体的含量不断升高,等温5 h后,贝氏体含量高于75%。

关键词(KeyWords)： 终冷温度;等温时间;贝氏体;残留奥氏体

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51274036)

作者(Author): 高石,蔡庆伍,余伟,刘涛,潘学福

DOI: 10.13289/j.issn.1009-6264.2015.02.022

参考文献(References)：

• [1]Irvine K J,Pickering F B.Low Carbon Bainitic Steels[J].Iron and Steel Inst,1957,187:292-309
• [2]黄维刚,方鸿生,郑燕康.C-Si-Mn-B系贝氏体钢的强度及强化机制[J].钢铁研究学报,2003,15(1):38-41.HUANG Wei-gang,FANG Hong-sheng,ZHENG Yan-kang.Strength and strengthening mechanism of C-Si-Mn-B bainitic steel[J].Journal of Iron and Steel Research,2003,15(1):38-41.
• [3]方鸿生,冯春,郑燕康,等.新型Mn系空冷贝氏体钢的创制与发展[J].热处理,2008,23(3):2-19.FANG Hong-sheng,FENG Chun,ZHENG Yan-kang,et al.Creation and development of novel Mn series air cooled bainitic steels[J].Heat Treatment,2008,23(3):2-19
• [4]贺信莱,尚成嘉,杨善武,等.高性能低碳贝氏体钢:成分,工艺,组织,性能与应用[M].北京:冶金工业出版社,2008:58-81.
• [5]Caballero F G,Bhadeshia H,Mawella K J A,et al.Design of novel high strength bainitic steels:Part 1[J].Materials Science and Technology,2001,17(5):512-516.
• [6]Caballero F G,Bhadeshia H,Mawella K J A,et al.Design of novel high strength bainitic steels:Part 2[J].Materials Science and Technology,2001,17(5):517-522.
• [7]Caballero F G,Bhadeshia H.Very strong bainite[J].Current Opinion in Solid State and Materials Science,2004,8(3):251-257.
• [8]Sharma S,Sangal S,Mondal K.Development of new high-strength carbide-free bainitic steels[J].Metallurgical and Materials Transactions A,2011,42(13):3921-3933.
• [9]Wang X L,Wu K M,Hu F,et al.Multi-step isothermal bainitic transformation in medium-carbon steel[J].Scripta Materialia,2014,74:56-59.
• [10]陈雨来,董长征,蔡庆伍,等.Mo和Ni对高强无碳化物贝氏体钢组织转变与力学性能的影响[J].材料工程,2013(9):16-21.CHEN Yu-lai,DONG Chang-zheng,CAI Qing-wu,et al.Effect of Mo and Ni on microstructure and mechanical properties of carbide-free bainite ultrahigh strength steels[J].Journal of Materials Engineering,2013(9):16-21.
• [11]宋维锡.金属学[M].北京:冶金工业出版社,2008:325-326.
• [12]方鸿生,王家军,杨志刚,等.贝氏体相变[M].北京:科学出版社,1999:84-87.
• [13]Long X Y,Zhang F C,Kang J,et al.Low-temperature bainite in low-carbon steel[J].Materials Science and Engineering A,2014,594:344-351.
• [14]Caballero F G,Miller M K,Garcia-Mateo C,et al.Temperature dependence of carbon supersaturation of ferrite in bainitic steels[J].Scripta Materialia,2012,67(10):846-849.
• [15]Caballero F G,Miller M K,Garcia-Mateo C.Carbon supersaturation of ferrite in a nanocrystalline bainitic steel[J].Acta Materialia,2010,58(7):2338-2343.

文章评论(Comment)：