鲁军,王春燕,蔡叶青,韦习成,王武荣

• 1:上海大学材料科学与工程学院

摘要(Abstract)：

采用OM、SEM、TEM和XRD等分析方法,研究了90CrMnTi钢经780℃淬火(1~3)次和180℃回火处理后的组织和性能,分析了循环淬火-回火处理对冲击韧性的影响。研究表明,循环淬火显著改善了90CrMnTi钢的冲击韧性,但对其硬度的影响较小。经3次淬火后其晶粒尺寸从1次淬火的约18μm减小到3μm,马氏体片的宽度明显变窄,未溶碳化物减少和残留奥氏体量增加。宽度20~70 nm的薄膜状残留奥氏体分布于马氏体片间或马氏体片与碳化物的交界处,且与相邻马氏体满足K-S或NW位向关系。90CrMnTi钢冲击韧性显著提高的根本原因是循环淬火-回火处理所致的晶粒超细化、马氏体片细化和碳化物减少及残留奥氏体量增加的综合作用的结果。

关键词(KeyWords)： 循环淬火;冲击韧性;奥氏体晶粒;残留奥氏体

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(50975166);; 2012年上海高校青年教师培养资助计划(B.37-0110-12-017)

作者(Author): 鲁军,王春燕,蔡叶青,韦习成,王武荣

DOI: 10.13289/j.issn.1009-6264.2014.01.014

参考文献(References)：

• [1]Atanu Sahaa,Dipak Kumar Mondalb,Joydeep Maity.Effect of cyclic heat treatment on microstructure and mechanical properties of 0.6 wt%carbon steel[J].Materials Science and Engineering A,2010,527(16):4001-4007.
• [2]Morito S,Tanaka H,Konishi R.The morphology and crystallography of lath martensite in alloy steels[J].Acta Materialia,2006,54(19):5323-5331.
• [3]惠卫军,董瀚,翁宇庆,等.超细晶粒高强度钢的延迟断裂行为[J].金属学报,2004,40(6):561-568.HUI Wei-jun,DONG Han,WENG Yu-qing,et al.Delayed fracture behavior of ultrafine grained high strength steel[J].Acta Metallurgica Sinica,2004,40(6):561-568.
• [4]Liu Y J,Li Y M.Apparent morphologies and nature of packet martensite in high carbon steels[J].Journal of Iron and Steel Research,2006,13(3):40-46.
• [5]Zhu J W,Xu Y,Liu Y N.Lath martensite in 1.4%C ultra-high carbon steel and its grain size effect[J].Materials Science and Engineering A,2004,385(1):440-444.
• [6]Zhang Z L,Liu Y N,Zhang K K,et al.Apparent morphology and structure of martensite in ultrahigh carbon steel[J].Transactions of Materials and Heat Treatment,2010,31(9):33-36.
• [7]许雁,朱杰武,柳永宁.超高碳钢马氏体相变及超细晶粒对亚结构影响[J].西安交通大学学报,2004,38(7):725-728.XU Yan,ZHU Jie-wu,LIU Yong-ning.Martensite transformation of an ultra-high carbon steel and grain size effect on sub-structure[J].Journal of Xi’an Jiaotong University,2004,38(7):725-728.
• [8]Hayzelden C,Cantor B.The martensite transformation in Fe-Ni-C alloys[J].Acta Metallurgica Sinica,1986,34(2):233-242.
• [9]姚圣杰,杜林秀,刘相华,等.循环加热-淬火工艺下超细晶奥氏体的晶粒演变特征[J].材料热处理学报,2009,30(5):50-54.YAO Sheng-jie,DU Lin-xiu,LIU Xiang-hua,et al.Evolution of ultra-fine austenite grains in Nb and Nb-V-Ti microalloyed low carbon steel under cyclic heating-quenching treatment[J].Transactions of Materials and Heat Treatment,2009,26(1):50-54.
• [10]周玉.材料分析方法(第2版)[M].北京:机械工业出版社,2004.
• [11]García-Junceda A.Dependence of martensite start temperature on fine austenite grain size[J].Scripta Materialia,2008,58(2):134-137.
• [12]Guimaraes J R C.Excess driving force to initiate martensite transformation in fine-grained austenite[J].Scripta Materialia,2007,57(3):237-239.
• [13]徐祖耀.马氏体相变与马氏体(第2版)[M].北京:科学出版社,1999.
• [14]李长海,余永宁.金属和合金中的相变[M].北京:冶金工业出版社,1988.
• [15]戎咏华,陈乃录.淬火-分配-回火工艺和多循环淬火-分配-回火工艺[J].热处理,2011,26(5):1-9.RONG Yong-hua,CHEN Nai-lu.Quenching-partitioning-tempering and multicycle quenching-partioning-tempering processes[J].Heat Treatment,2011,26(5):1-9.

文章评论(Comment)：