余星星,胡成亮,赵震

• 1:上海交通大学模具CAD国家工程研究中心

摘要(Abstract)：

利用单道次热压缩试验在Gleeble-1500热模拟试验机上,通过控制变形温度:973、1023、1073和1123 K,应变速率:0.01、0.1、1和5 s-1研究了40Cr钢的动态再结晶行为,根据应力应变曲线分析了40Cr钢的动态再结晶规律,采用回归法确定了双曲线本构方程中的材料常数和激活能(366.7 kJ/mol),建立了40Cr钢的本构方程;同时确定了40Cr钢的临界应变、峰值应变、峰值应力、稳态应力和动态软化量Ω等关键物理量。

关键词(KeyWords)： 激活能;动态再结晶;单道次热压缩试验;数学模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51005149);; 国家科技重大专项课题(2011ZX04016-051)

作者(Author): 余星星,胡成亮,赵震

DOI: 10.13289/j.issn.1009-6264.2012.09.012

参考文献(References)：

• [1]武来智,陈军,张鸿冰.40Cr钢奥氏体动态再结晶及晶粒细化[J].上海交通大学学报,2008,42(5):786-790.WU Lai-zhi,CHEN Jun,ZHANG Hong-bing.Dynamic recrystallization of austenite and grain refinement in 40Cr steel[J].Journal of ShanghaiJiaotong University,2008,42(5):786-790.
• [2]王有铭,李曼云,韦光.钢材的控制轧制和控制冷却[M].北京:冶金工业出版社,1995.
• [3]Laasraoui A,Jonas J J.Recrystallization of austenite after deformation at high temperatures and strain rates-analysis and modeling[J].MetallurgicalTransactions A,1991,22(1):151-160.
• [4]张红英,张鸿冰.40Cr钢的形变热处理行为[J].热加工工艺,2006,35(2):50-54.ZHANG Hong-ying,ZHANG Hong-bing.Deformation heat treatment behavior of 40Cr steel[J].Hot Working Technology,2006,35(2):50-54.
• [5]韩莉,赵程.40Cr钢富氮层快速离子渗氮技术的探索[J].材料热处理学报,2009,30(4):124-128.HAN Li,ZHAO Cheng.Study on fast plasma nitriding technology of 40Cr steel with nitrogen[J].Transactions of Materials and Heat Treatment,2009,30(4):124-128.
• [6]权国政,张艳伟,周杰,等.基于动态再结晶仿真的40Cr轴锻件锻透性研究[J].热加工工艺,2010,39(3):23-25.QUAN Guo-zheng,ZHANG Yan-wei,ZHOU Jie,et al.Research on forging penetration efficiency of 40Cr axial forging by simulation of dynamicrecrystallization[J].Hot Working Technology,2010,39(3):23-25
• [7]王瑞权,韩秋华,刘妍妍,等.热处理工艺对40Cr组织和摩擦性能的影响[J].热处理技术与装备,2010,31(2):29-33WANG Rui-quan,HAN Qiu-hua,LIU Yan-yan,et al.Effect of heat treatment process on microstructure and frictional properties of 40Cr steel[J].Heat Treatment Technology and Equipment,2010,31(2):29-33
• [8]McQueen H J,Yue S,Fry E.Hot working characteristics of steels in austenitic state[J].Journal of Materials Processing Technology,1995,53(1-2):293-310.
• [9]Imbert C,Ryan N D,McQueen H J.Hot workability of three grades of tool steel[J].Metallurgical and Materials Transactions A,1984,15(10):1855-1864.
• [10]Medina S F,Hernandez C A.General expression of the Zener-Hollomon parameter as a function of the chemical composition of low alloy andmicroalloyed steels[J].Acta Materialia,1996,44(1):137-148.

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