顾苏怡

• 1:苏州市职业大学机电工程系

摘要(Abstract)：

通过电阻方法研究了应变为2.89的共析钢在时效过程中析出动力学过程。研究表明,时效过程分为两个阶段:低于200℃(3600s),电阻率随着时效时间先增加后降低;200～298℃,电阻率随时效时间延长而降低。并揭示了大变形共析钢时效机制:大变形后获得的过饱和铁素体和高浓度界面偏聚碳为碳化物析出提供热力学驱动力,而高能界面处为渗碳体晶粒形核提供有效形核位置,碳原子的长程扩散控制着析出碳化物长大。

关键词(KeyWords)： 时效;析出;大变形共析钢

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 顾苏怡

DOI: 10.13289/j.issn.1009-6264.2010.03.012

参考文献(References)：

• [1]Shin D H,Han S Y.Spheroidization of low carbon steel processed by equal channel angular pressing[J].Materials Transactions,2003,44:1603-1635.
• [2]Hong M,Reynolds W T,Tarui T,et al.Microstructural changes in aluminum alloy by equal channel angular extrusion[J].Metallurgical and Materials Transactions A,1999,30:713-717.
• [3]Furukawa M,Horita Z,Zhilyaev A P.Devepoping ultrafine-grained microsturctures through the use of severe plastical deformation[J].Materials Science Forum,2003,426-432:2631-2636.
• [4]Murayma M,Horita Z,Hono K.Microstructure of two phase Al-1.7at%Cu alloy deformed by equal-channel angular pressing[J].Acta Materials,2001,49:21-29.
• [5]XU Y,Umemoto M,Tsuchiya K.Comparison of the characteristics of nanocrystalline ferrite in Fe-0.89C steels with pearlite and spheroidite structure produce by ball milling[J].Materials Transactions,2002,43:2205-2212.
• [6]Languillaume J,Kapelski G,Baudelet B.Evolution of the tensile strength in heavily cold drawn and annealed pearlitic steel wires[J].Materials Science Letters,1997,33:241-245.
• [7]田莳,李秀臣,刘正堂.金属物理性能[M].北京:航空工业出版社,1993.
• [8]J.Christian.Thoery of Transformation in Metals and Alloys[M].Oxford:Pergamon Press,1997.
• [9]JIANG J X,Matsugi K,Sasaki G,et al.Resistivity study of eutectoid decomposition kinetics ofα-Fe2Si3alloy[J].Materials Transactions,2005,60:720-725.
• [10]Buono V T L,Andrade M S,Gonzalez B M.Kinetics of strain aging in drawn pearlitc steels[J].Metall Mater Trans A,1989,29:1415-1423.
• [11]Watte P,Van Humbeeck J,Aernoudt E,et al.Strain ageing in heavily drawn eutectoid steel wires[J].Scripta Materials,1996,34:89-95.
• [12]闵娜,李伟,金学军,等.时效对冷拔珠光体钢力学性能的影响[J].金属学报,2006,42(10):1009-1013.MIN Na,LI Wei,JIN Xue-jun,et al.The effect of aging to the mechanical property of cold-drawn pearlitic steel[J].Acta Metallurgica Sinica,2006,42(10):1009-1013.

文章评论(Comment)：