The effect of carbon on the restoration phenomena during hot deformation of carbon steels
The effect of carbon on the restoration phenomena during hot deformation of carbon steels
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DOI：
10.3139/146.020916
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发表时间：
2001-01
影响因子：
0.8
通讯作者：
S. Serajzadeh;A. Taheri;Seyed Mojtaba Zebarjad
中科院分区：
文献类型：
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作者：
S. Serajzadeh;A. Taheri;Seyed Mojtaba Zebarjad
研究了碳含量对碳钢在热变形过程中和热变形后的动态再结晶动力学和静态再结晶动力学的影响。为此，利用不同应变速率和温度下的单次和双次热压缩实验，结合Avrami型动力学方程和Bergstrom方法研究了再结晶行为。结果表明，随着碳含量的增加，热变形的表观激活能减小，在高温和/或低应变速率下，动态再结晶速度加快。在低应变速率下，碳含量越高，静态再结晶速率越高，而在高应变速率下，静态再结晶动力学越慢。
Abstract A study has been made to determine the influence of the carbon content on the kinetics of dynamic and static recrystallization during and after hot deformation of carbon steels. For this purpose, single- and double-hit hot compression experiments at various strain rates and temperatures together with the Avrami-type kinetics equation and Bergstrom approach have been utilized to investigate recrystallization behavior. The results show that the apparent activation energy of hot deformation decreases with increasing carbon content and this phenomenon results in a faster dynamic recrystallization at high temperatures and/or low strain rates. Also, increasing carbon content leads to a higher rate of static recrystallization at low strain rates while at high strain rates it causes a slower kinetics of static recrystallization.