何燕霖,朱娜琼,吴晓瑜,李麟

• 1:上海大学材料科学与工程学院

摘要(Abstract)：

对时效处理条件下富Cr碳化物在Fe基多元合金中的演变行为进行了分析与计算。采用3DAP、XRD以及TEM技术表征了组织中碳化物的类型及尺寸随时间的变化,而后采用Thermo-Calc和PANDAT软件对碳化物的演变过程进行了热力学与动力学计算。结果表明:经800℃时效处理后合金组织中初始形核的相为M23C6型碳化物,10 min后该析出相的半径约为9 nm,而100 h后M23 C6型碳化物逐渐向稳定相M7 C3型碳化物转变;结合Thermo-Calc和PANDAT软件的计算结果可以较为准确地预测碳化物类型以及颗粒尺寸随时效时间的变化行为。

关键词(KeyWords)： 铁基合金;富Cr碳化物;时效处理;热力学与动力学计算;3DAP

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(50971137);国家自然科学基金重点项目(50934011)

作者(Author): 何燕霖,朱娜琼,吴晓瑜,李麟

DOI: 10.13289/j.issn.1009-6264.2011.01.025

参考文献(References)：

• [1]Chen Q,Jeppsson J,Agren J.Analytical treatment of diffusion during precipitate growth in multicomponent systems[J].Acta Mater,2008,56:1890-1896.
• [2]Bjrbo A,Httesterand M.Complex carbide growth,dissolution,and coarsening in a modified 12pct chromium steel-an experimental and theoreticalstudy[J].Metall Mater Trans A,2001,32:19-27.
• [3]Perez M,Dumont M,Acevedo-Reyes D.Implementation of classical nucleation and growth theories for precipitation[J].Acta Mater,2008,56:2119-2132.
• [4]Fujita N,Bhadeshia H K D H,Kikuchi M.Modeling M6C precipitation in niobium-alloyed ferritic stainless steel[J],Metall Mater Trans A,2002,33:3339-3347.
• [5]Cao W,Chen S L,Zhang F,et al.PANDAT software with Pan Engine,panoptimizer and panprecipitation for multi-component phase diagramcalculation and materials property simulation[J].Calphad,2009,33(2):328-342.
• [6]Miller M K,Simth G D W.Atom Probe Microanalysis:Principles and Applications to Materials Problems[M].Beijing:Peking University Press,1993.
• [7]Robson J D.Modeling the evolution of particle size distribution during nucleation,growth and coarsening[J].Mater Sci Technol,2004,20:441-448.
• [8]Leitner H,Bischof M,Clemens H,et.al.Precipitation behaviour of a complex steel[J].Adv Eng Mater,2006,8(11):1066-1077.
• [9]雍岐龙.钢铁材料中的第二相[M].北京:冶金工业出版社,2006.
• [10]Xiao S Q,Haasen P.HREM investigation of homogeneous decomposition in a Ni-12 at%Al alloy[J].Acta Metal Mater,1991,39(4):651-659.
• [11]Pearson W B.A Handbook of Lattice Spacings and Structures of Metals[M].Oxford:Pergamon Press,1958.

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