Model of Dynamic Recrystallization Critical Strain in Ferrite Deformation of Ti-IF Steel

徐光; 徐楚韶; 赵嘉蓉; 刘显军; 熊俊伟

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Model of Dynamic Recrystallization Critical Strain in Ferrite Deformation of Ti-IF Steel

更新时间：2026-01-21

- Model of Dynamic Recrystallization Critical Strain in Ferrite Deformation of Ti-IF Steel
- Special Steel Vol. 26, Issue 6, Pages: 8-9(2005)
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- Received：02 June 2005，
  
  Online First：11 April 2023，
  
  Published：11 April 2005
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徐光, 徐楚韶, 赵嘉蓉, et al. Model of Dynamic Recrystallization Critical Strain in Ferrite Deformation of Ti-IF Steel[J]. Special Steel, 2005, 26(6): 8-9.
DOI：

徐光, 徐楚韶, 赵嘉蓉, et al. Model of Dynamic Recrystallization Critical Strain in Ferrite Deformation of Ti-IF Steel[J]. Special Steel, 2005, 26(6): 8-9. DOI：

摘要

用Thermecmaster-Z热模拟试验机试验得出成分为0.006 7%C-0.045 0%Ti的Ti-IF(无间隙原子)钢在变形温度750~900℃和变形速率0.1~40 s

-1

时的应力-应变曲线

确定了Zener-Holloman参数Z与应变速率.ε和温度T(K)的关系式Z=.εexp(39 507/T)

并建立了临界应变εc与原始晶粒尺寸d0和Z参数的临界应变方程ε

=2.314 4×10

-3

×d

-0.80

×Z

0.050

。结果表明

在相同变形速率下

850℃变形时动态再结晶最易发生

当变形温度提高至900℃(两相区)时

即使在低变形速率(1 s

-1

)

也不发生动态再结晶。当变形速率大于1 s

-1

时

Ti-IF钢热加工时不能出现动态再结晶。临界应变预测值与实测值比较

平均误差≤5%。

Abstract

Hie stress-strain curves of 0.006 7C-0.045 0Ti Ti-IF (interstitial free) steel with deformation temperature 750 - 900 °C and deformation rate 0.1 - 40

-1

has been tested and obtained Ihennecmaster-Z thermal simulation test machine

based on that the relational expression between Zener-Holloman parameter Z and deformation rate ε - temperature T (K) ： Z= e exp (39 507/T) is defined

and the critical strain fonnula for relation between critical strain ec and original grain size Z parameter： e

= 2.314 4 x 10

-3

X d

-0.8003 9

×Z

0.050

is established. The results showed that with same deformation rate the dynamic recrystallization of steel occurred most easily at 850 ℃

as deformation temperat

ure increased to 900 °C (dual phase region)

the dynamic recrystallization un-occurred even at low deformation rate (1 s

-1

)

and as deformation rate was more than 10 s

-1

the dynamic recrystallization of Ti-IF steel also un-occurred during hot rolling. With comparison between predicted value of critical strain and measured value

the average error was no more than 5 % .

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