桂晓露,刘蓉,高古辉,白秉哲,王晓东,马海峰

• 1:北京交通大学机械与电子工程学院
• 2:河北钢铁股份有限公司承德分公司

摘要(Abstract)：

采用淬火膨胀仪测定了两种不同Cr含量(0.2%和0.5%)的贝氏体钢筋的连续冷却转变曲线(CCT曲线),并采用光学显微镜(OM)、扫描电镜(SEM)和维氏硬度分析了Cr元素对贝氏体钢筋过冷奥氏体连续冷却转变规律、显微组织特别是贝氏体组织转变规律以及显微硬度的影响。研究表明,Cr含量从0.2%提高至0.5%对贝氏体转变具有显著影响;同时,少量的Cr对贝氏体的形态及分布具有显著影响,当Cr含量为0.2%时,贝氏体形态以粒状贝氏体和上贝氏体板条为主,但是Cr提高至0.5%时,观察到了"柳叶状"的下贝氏体组织,因此添加少量的Cr即可显著提高贝氏体转变区间钢的显微硬度。

关键词(KeyWords)： 贝氏体;显微组织;Cr元素;CCT曲线

Abstract:

Keywords:

基金项目(Foundation): 国家973项目(2015CB654804)

作者(Author): 桂晓露,刘蓉,高古辉,白秉哲,王晓东,马海峰

DOI: 10.13289/j.issn.1009-6264.2016.10.027

参考文献(References)：

• [1]王劲.高强精轧螺纹钢筋连续感应热处理及控制变形研究[D].北京:北京机电研究所,2011.
• [2]米永峰.VN微合金化500 MPa级高强抗震钢筋工艺研究[D].昆明:昆明理工大学,2011.
• [3]李文韬,李正操,白秉哲.V对低合金Mn Si Cr空冷贝氏体/马氏体复相钢强韧性的影响[J].原子能科学技术,2010,44:359-362.LI Wen-tao,LI Zheng-cao,BAI Bing-zhe.Effect of V on strength and toughness of low alloyed air-cooled Mn Si Cr bainite/martensite multiphase steels[J].Atomic Energy Science and Technology,2010,44:359-361.
• [4]雍岐龙.钢铁材料中的第二相[M].北京:冶金工业出版社,2006.
• [5]YANG Cai-fu,WANG Quan-li.Research,development,and production of V-N microalloyed high strength rebars for building in china[J].Journal of Iron and Steel Research,2008,15(2):81-86.
• [6]陈伟,施哲,陈红,等.控冷温度对钒铌合金高强度钢筋组织和性能的影响[J].材料热处理学报,2013,34(10):55-61.CHEN Wei,SHI Zhe,CHEN Hong,et al.Effects of controlled cooling temperature on microstructure and performance of V-Nb microalloyed highstrength rebars[J].Transactions of Materials and Heat Treatment,2013,34(10):55-61.
• [7]陈伟,施哲,赵宇,等.铌微合金化和控冷工艺开发HRB500抗震钢筋[J].材料热处理学报,2010,31(7):77-82.CHEN Wei,SHI Zhe,ZHAO Yu,et al.Development of Nb microalloyed HRB500 anti-seismic ribbled bars produced by controlled cooling process[J].Transactions of Materials and Heat Treatment,2010,31(7):77-82.
• [8]王厚昕,李正邦.中国热轧带肋钢筋的发展和现状[J].中国冶金,2006,16(6):6-9.WANG Hou-xin,LI Zheng-bang.Status and development of hot ribbed bars in china[J].China Metallurgy,2006,16(6):6-9.
• [9]黄进峰.新型高硅变质贝氏体铸钢及其耐磨机制研究[D].北京:清华大学,1995.
• [10]李琪.新型Mn-Si-Cr系空冷贝氏体铸钢强韧性的研究[D].北京:清华大学,2003.
• [11]徐平光.仿晶界型铁素体/粒状贝氏体复相钢的研究[D].北京:清华大学,2002.
• [12]王勇围.低碳Mn系空冷贝氏体钢的强韧化优化研究[D].北京:清华大学,2002.
• [13]FANG Hong-sheng,FENG Chun.Creation of air-cooled Mn series bainitic steels[J].Joural of Iron and Steel Research Int,2008,15(6):1-10.
• [14]GAO Gu-hui,ZHANG Han,GUI Xiao-lu.Enhanced ductility and toughness in an ultrahigh-strength Mn-Si-Cr-C steel:The great potential of ultrafine filmy retained austenite[J].Acta Materialia,2014,76:425-433.
• [15]GAO Gu-hui,ZHANG Han,GUI Xiao-lu.Tempering behavior of ductile 1700MPa Mn-Si-Cr-C steel treated by quenching and partitioning process incorporating bainite formation[J].Journal of Material and Science Technology,2015,31(2):199-204.
• [16]Han Futao,Hwang Byoungchul,Suh Dong-Woo,et al.Effect of molybdenum and chromium on hardenability of low-carbon boron-added steels[J].Metalsand Materials Internatioanal,2008,14(6):667-672.
• [17]牛枫,赵爱民,赵征志,等.铬对超高强冷轧双相钢相变和组织性能的影响[J].钢铁研究学报,2010,22(7):47-50.NIU Feng,ZHAO Ai-min,ZHAO Zheng-zhi,et al.Effect of Cr on transformation,microstructure and properties of ultra-high strength cold-rolled dual phase steel[J].Journal of Iron and Steel Research,2010,22(7):47-50.
• [18]牛延龙.Cr对低碳高铌X80管线钢再结晶和相变的影响[M].昆明:昆明理工大学,2009.
• [19]李文韬.V对低合金Mn系空冷贝氏体钢组织与性能的影响[D].北京:清华大学,2011.
• [20]桂晓露,郭峰,高古辉,等.Cr对低合金Mn Cr B系贝氏体铸钢组织及耐磨性能的影响[J].铸造,2015,64(2):101-105.GUI Xiao-lu,GUO Feng,GAO Gu-hui,et al.Efect of Cr contents on the microstructure,mechanical properties and abrasive wear behavior of the lowalloyed Mn Cr B series cast steels[J].Foundary,2015,64(2):101-105.

文章评论(Comment)：