THE HOT DEFORMATION BEHAVIOR AND DYNAMIC RECRYSTALLIZATION MODEL OF 35CrMo STEEL

查看全文 作　　者：[1]B.Zhang;[1]H.B.Zhang;[1]X.Y.Ruan;[1]Y.Zhang

机构地区：[1]Department of Plasticity Technology Shanghai Jiao Tong University,Shanghai 200030, China,Department of Materials Science and Engineering, Shanghai Institute of Technology Shanghai 200053,China,Department of Plasticity Technology Shanghai Jiao Tong University,Shanghai 200030,China,State Key Laboratory for Advanced Metals & Materials,University of Science and Technology Beliing,Beijing 100083, China

出　　处：《Acta Metallurgica Sinica(English Letters)》索引2003年第16卷第3期,共9页

基　　金：supported by the National Natural Science Foundation of China(Grant No.50075053). 摘　　要：The isothermal single-stage compression of 35CrMo structural steel has been carried out by using Gleeble 1500 simulator at the temperature range of 950℃ to 1150℃and strain rate range of 0. 01s-1 to 10s-1. The effect of hot deformation parameters,such as strain rate, deformed temperature and initial grain size on the flow stress behavior was investigated. The activation energy of tested alloy was calculated, which is 378.16k J/mol; The relationships between the peak stress (σp), the peak stain (εp),the critical strain (cc) and Z parameter were established. The microstructure evolution shows the pre-existing austenite grain boundaries constitute the principal nucleation sites for dynamic recrystallization (DRX), and the initial austenite grain size affects the grain size of DRX slightly. The kinetic mathematical model of DRX of 35CrMo is: XDRX=1-exp(-3.23.(ε-εc/εs-εc)2.28) and Ddyn = 2.252 × 104 Z-0.22. 关键词：35CRMO钢热变形动力学 DRX模型活化能晶粒尺寸

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THE HOT DEFORMATION BEHAVIOR AND DYNAMIC RECRYSTALLIZATION MODEL OF 35CrMo STEEL

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