陈祥

• 1:清华大学机械工程系教育部先进成形制造重点实验室

摘要(Abstract)：

采用X射线衍射对RE/V/Ti复合变质处理后高硅铸钢等温淬火组织中残留奥氏体量及残留奥氏体含碳量进行了测定。采用透射电子显微镜(TEM)和光学显微镜(OM)对高硅铸钢等温淬火热处理后的显微组织以及残留奥氏体分布形态进行了研究。结果表明,等温温度低于385℃时,复合变质处理高硅铸钢中残留奥氏体量及残留奥氏体平均含碳量均低于未变质高硅铸钢;385℃等温处理时,两者的残留奥氏体量及残留奥氏体平均含碳量基本相同。等温淬火高硅铸钢显微组织中残留奥氏体呈两种分布形态:薄膜状及块状。在相同的等温温度下,复合变质处理使残留奥氏体薄膜厚度以及贝氏体铁素体板条厚度、长度均大幅度减小,块状残留奥氏体的量大为减少,有利于高硅铸钢综合力学性能的提高。

关键词(KeyWords)： 高硅铸钢;等温淬火;残留奥氏体;变质处理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50974080)

作者(Author): 陈祥

DOI: 10.13289/j.issn.1009-6264.2011.03.017

参考文献(References)：

• [1]Santos H M C M.Austempering studies of silicon cast steels[A].LIU Bai-cheng.Proceedings of the 61st World Foundry Congress[C]//Beijing:International Academic Press,1995:347-358.
• [2]LI Yanxiang,CHEN Xiang.Microstructure and mechanical properties of austempered high silicon cast steel[J].Materials Science and EngineeringA,2001,308:277-282.
• [3]李言祥,陈祥.非金属夹杂物对等温淬火高硅铸钢力学性能的影响[J].铸造,2000,49(9):252-255.LI Yan-xiang,CHEN Xiang.Effect of non-metallic inclusions on the mechanical properties of austempered high silicon cast steel[J].Foundry,2000,49(9):252-255.
• [4]陈祥,李言祥,符寒光.高硅铸钢的断裂韧性[J].金属学报,2005,41(10):1061-1065.CHEN Xiang,LI Yan-xiang,FU Han-guang.Fracture toughness of austempered high silicon cast steel[J].Acta Metallurgica Sinica,2005,41(10):1061-1065.
• [5]Putatunda S K.Fracture toughness of a high carbon and high silicon steel[J].Materials Science and Engineering A,2001,297:31-43.
• [6]Putatunda S K.Influence of austempering temperature on microstructure and fracture toughness of a high-carbon,high-silicon and high-manganesecast steel[J].Materials Design,2003,24:435-443.
• [7]Putatunda S K.Austempering of a silicon manganese cast steel[J].Materials and Manufacturing Processes,2001,16(6):743-762.
• [8]Edmonds D V,Cochrane R C.Structure-property relationships in bainitic steels[J].Metallurgical Transaction A,1990,21(6):1527-1540.
• [9]Bhadeshia H K D H,Edmonds D V.Bainite in silicon steels:new composition-property approach.Part 1[J].Metal Science,1983,17(9):411-419.
• [10]Bhadeshia H K D H,Edmonds D V.Bainite in silicon steels:new composition-property approach.Part 2[J].Metal Science,1983,17(9):420-425.
• [11]Miihkinen V T T,Edmonds D V.Tensile deformation of two experimental high-strength bainitic low-alloy steels containing silicon[J].MaterialsScience and Technology,1987,3(6):432-439.
• [12]黄进峰,方鸿生,徐平光,等.稀土、钛变质对贝氏体铸钢成分偏析及强韧化的影响[J].金属热处理学报,2000,21(1):32-39.HUANG Jin-feng,FANG Hong-sheng,XU Ping-guang,et al.Influence of RE/Ti modification on dendrite segregation and strength and toughness[J].Transactions of Metal Heat Treatment,2000,21(1):32-39.
• [13]黄进峰,方鸿生,余贵春,等.稀土、钛复合变质剂对贝氏体钢铸态晶粒细化的研究[J].金属热处理,1999,9:5-9.HUANG Jin-feng,FANG Hong-sheng,YU Gui-chun,et al.Study of RE-Ti multi-modification on grain refinement of bainitic cast steel[J].HeatTreatment of Metals,1999,9:5-9.
• [14]王英华.X光衍射技术基础[M].北京:原子能出版社,1993.
• [15]Turnbull D.Vonnegut B.Nucleation catalysis[J].Industrial and Engineering Chemistry,1952,44(6):1292-1294.
• [16]陈祥,李言祥.稀土、钒、钛变质处理对高硅铸钢晶粒细化的影响[J].材料热处理学报,2006,27(3):73-78.CHEN Xiang,LI Yan-xiang.Effects of RE/V/Ti multi-modification on grain refinement of high silicon cast steel[J].Transactions of Materials andHeat Treatment,2006,27(3):73-78.
• [17]余宗森,褚幼义,贺信莱,等.钢中稀土[M].北京:冶金工业出版社,1982.
• [18]雍歧龙,马鸣图,吴宝榕.微合金钢-物理和力学冶金[M].北京:机械工业出版社,1989.

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