冯广海,黄俊霞,杜忠泽,王经涛,赵西成

• 1:西安建筑科技大学冶金工程学院
• 2:宝钢集团一钢公司技术中心
• 3:南京理工大学材料科学与工程系

摘要(Abstract)：

采用透射和扫描电子显微镜研究了ECAP变形中渗碳体的变形特征。结果表明:片状渗碳体相主要以弯曲变形、剪切变形、拉伸变形、扭折变形和剪断变形5种方式协调ECAP剧烈塑性变形,这表明在本实验ECAP纯剪切变形条件下钢中硬而脆的渗碳体相具有良好的塑性变形能力。渗碳体片层的变形方式主要是取决于渗碳体所处的应力状态,而渗碳体所处的应力状态是与渗碳体的片层取向和片层厚度密切相关,其中渗碳体的片层厚度起决定性作用。

关键词(KeyWords)： 亚微晶材料;钢;ECAP变形;渗碳体;显微组织

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(59974018);; 陕西省自然科学基金资助项目(2003E121)

作者(Author): 冯广海,黄俊霞,杜忠泽,王经涛,赵西成

DOI: 10.13289/j.issn.1009-6264.2011.06.012

参考文献(References)：

• [1]Valiev R Z,Islamgaliev R K,Alexandrov I V.Bulk nanostructured materials from severe plastic deformation[J].Progress in Materials Science,2000,45:103-189.
• [2]Valiev R Z,Korznikov A V,Mulyukov R R.Structure and properties of ultrafine-grained materials produced by severe plastic deformation[J].Materials Science and Engineering A,1993,168(2):141-148.
• [3]冯广海.45钢ECAP变形研究[D].西安:西安建筑科技大学,2004.FENG Guang-hai.A study of the ECAP distortion of No.45 steel[D].Xi’an University of Architecture and Technology,2004.
• [4]Segal V M.Engineering and commercialization of equal channel angular extrusion[J].Materials and Engineering A,2004,386(1-2):269-276.
• [5]杜忠泽,冯广海,符寒光,等.45钢等径弯曲通道变形及组织细化研究[J].钢铁,2006,41(1):75-79.DU Zhong-ze,Feng Guang-hai,Fu Han-guang,et al.Study of ECAP distortion and structure refinement for No.45 steel[J].Iron and Steel,2006,41(1):75-79.
• [6]Langford G.Deformation of pearlite[J].Metallurgical Transactions A,1977,8(6):861-875.
• [7]张晓丹,Godfrey Andrew,刘伟,等.冷拉拔珠光体钢丝中渗碳体变形与溶解研究[J].金属热处理,2009,34(9):1-4.ZHANG Xiao-dan,Godfrey Andrew,LIU Wei,et al.Cementite deformation and dissolution in a cold-drawn pearlitic steel wire[J].Heat Treatment ofMetals,2009,34(9):1-4.
• [8]Korznikov A V,Ivanisenko,Y U V,Laptionok D V,et al.Influence of severe plastic deformation on structure and phase composition of carbon steel[J].Nanostructured Materials,1994,4(2):159-167.
• [9]Toribio J,Ovejero E.Effect of cumulative cold drawing on the pearlite interlamellar spacing in eutectoid steel[J].Scripta Materialia,1998,39(3):323-328.
• [10]Michael Zelin.Microstructure evolution in pearlitic steels during wire drawing[J].Acta Materialia,2002,50:4431-4447.
• [11]谈育煦.金属电子显微分析[M].北京:机械工业出版社,1989.
• [12]黄新民.共析渗碳体结构与变形行为的透射电镜研究[J].钢铁研究学报,2000,12(2):60-62.Huang Xin-min.TEM investigation on the microstructure and deformation behavior of eutectoid cementite[J].Journal of Iron and Steel Research,2000,12(2):60-62.
• [13]Porter D A,Easterling K E,Smith G D W.Dynamic studies of the tensile deformation and fracture of pearlite[J].Acta Materialia,1978,26(9):1406-1422.
• [14]Hong M H,Reynolds W T,Tarui T,et al.Atom probe and transmission electron microscopy investigations of heavily drawn pearlitic steel wire[J].Materials Transactions A,1999,30:717-727.

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