Kinetics for static recrystallization after hot working of 0.38C-0.99Cr-0.16Mo steel^①

来源期刊：中南大学学报(英文版)2004年第4期

论文作者：李雄 张鸿冰 阮雪榆 罗中华 张艳

文章页码：353 - 357

Key words：hot working; steel; softening fraction; recrystallization; restoration mechanism; work-hardened

Abstract: The restoration mechanisms for static recrystallization of work-hardened austenite were investigated by using double-pass compression tests performed on medium-carbon steel containing chromium and molybdenum. The softening fraction was defined by 2% offset method. The results show that Avrami exponent of about 0.21 is insensitive to deformation temperature, indicating that the action of steel grade should be considered. The time of 50% recrystallization (t0.5) decreases noteworthily with the increase of deformation temperature. Apparent activation energy for static recrystallization of 195 kJ/mol, which is close to that of vanadium microalloyed steel, is obtained by calculating. The increasing trend of the driving force for recrystallization is opposite to that of the deformation temperature, which is attributed to the number of operative slip system increasing as temperature increasing.

基金信息：the National Natural Science Foundation of China