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| Static Recrystallization Behavior of Nb-Ti Microalloyed Steel |
| CHEN Jun,ZHOU Yan-lei,TANG Shuai,LIU Zhen-yu,WANG Guo-dong |
| The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China |
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Abstract The static recrystallization behavior of Nb-Ti microalloyed steel was investigated by two-stage interrupted compression testing. The static recrystallization activation energy of Nb-Ti microalloyed steel was determined and the static recrystallization kinetics model was established before strain-induced precipitation. The area measurement method and the integral-energy approach were used to calculate softening ratio which well reflected static recrystallization behavior and strain-induced precipitation behavior of the microalloyed steel. The softening ratio changes well reflect the evolution of microstructure and precipitates.The nose temperature of strain-induced precipitation was between about 900℃and 925℃,and the static recrystallization critical temperature was higher than 950℃.
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Received: 14 February 2011
Published: 22 May 2012
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2012, Vol. 47 
