夏志伟,孙新军,雍岐龙,李昭东,王振强

• 1:昆明理工大学材料科学与工程学院
• 2:钢铁研究总院结构材料研究所

摘要(Abstract)：

在Nb、Ti微合金化超低碳含Mn钢的成分设计基础上,通过控制轧制获得扁平奥氏体,随后控制冷却获得贝氏体组织,开发出新型的高韧性超低碳贝氏体钢。实验结果表明,在0.03C～3.4Mn微合金钢中使扁平奥氏体的厚度细化至4μm左右,超低碳贝氏体组织的屈服强度达到600 MPa,抗拉强度达到780 MPa,上平台冲击功约230 J,实现了强度与韧性的良好配合。利用电子背散射衍射(EBSD)技术对试验钢相变产物的组织形貌进行了表征,并对强韧化机理、成分和工艺的优越性进行了初步的分析。

关键词(KeyWords)： 扁平化;超低碳贝氏体钢;高韧性;EBSD

Abstract:

Keywords:

基金项目(Foundation): 国家“973”基础研究计划(2010CB630805)

作者(Author): 夏志伟,孙新军,雍岐龙,李昭东,王振强

DOI: 10.13289/j.issn.1009-6264.2013.03.024

参考文献(References)：

• [1]陈忠伟,张玉柱,杨林浩.低碳贝氏体钢的研究现状与发展前景[J].材料导报,2006,20(10):84-86.CHEN Zhong-wei,ZHANG Yu-zhu,YANG Lin-hao.Reasearch and development of low-carbon bainite steels[J].Materials Review,2006,20(10):84-86.
• [2]孙德勤,吴春京,谢建新.贝氏体钢的研究开发现状与发展前景探讨[J].机械工程材料,2003,27(6):4-7.SUN De-qin,WU Chun-jing,XIE Jian-xin.Reasearch and development of bainitc steels[J].Materials for Mechanical Engineering,2003,27(6):4-7.
• [3]方鸿生,郑康燕.我国贝氏体钢的前景[J].金属热处理,1998,21(7):11-14.FANG Hong-sheng,Zheng Kang-yan.Prospect of bainitc steels[J].Heat Treatment of Metals,1998,21(7):11-14.
• [4]Koo J Y,Luton M J,Bangaru N V,et al.Metallurgical design of ultra-high strength steels for gas pipelinea[C]//Proceeding of the Thirteenth,Hawii,2003 International Offshore and Polar Engineering Conference,2003:10-17.
• [5]Morris J W,Stronger Jr.Tougher steels[J].Science,2008,320:1022-1023.
• [6]李昭东.变形和合金元素对钢中奥氏体组织形成和分解相变的影响[D].北京:清华大学,2010.
• [7]Morito S,Yoshida H,Maki T,et al.Effect of block size on the strength of lath martensite in low carbon steels[J].Materials Science and EngineeringA,2006,438-440(25):237-240.
• [8]潘留俊,胡恒法,裴新华.空冷贝氏体系列钢种的开发及应用[J].轧钢,2008,25(6):50-52.PAN Liu-jun,HU Heng-fa,PEI Xin-hua.Development and application of the series of air cooled bainitic steels[J].Steel Rolling,2008,25(6):50-52.
• [9]张红梅,刘相华,王国栋,等.低碳贝氏体钢形变奥氏体的连续冷却相变研究[J].金属热处理学报,2000,21(4):35-39.ZHANG Hong-mei,LIU Xiang-hua,WANG Guo-dong,et al.Transformation research of deformed austenite of low-carbon bainitic steel[J].Transactions of Metal Heat Treatment,2000,21(4):35-40.
• [10]方鸿生,薄祥正,郑燕康,等.贝氏体组织与贝氏体钢[J].金属热处理,1998,23(11):2-7.FANG Hong-sheng,BO Xiang-zheng,ZHENG Yan-kang,et al.Bainitic microstructure and Mn-B bainitic steels[J].Heat Treatment of Metals,1998,23(11):2-7.
• [11]尚成嘉,王学敏,杨善武,等.高强度低碳贝氏体钢的工艺与组织细化[J].金属学报,2003,39(10):1019-1024.SHANG Cheng-jia,WANG Xue-min,YANG Shan-wu,et al.Microstructure refinement of high strength low carbon bainitic steel[J].Acta MetallurgicaSinica,2003,39(10):1019-1024.

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