摘要
利用Gleeble-1500D热模拟试验机对抽油杆钢20CrMo连铸坯在变形温度900～1100℃、应变速率0.0015～0.015 s^-1的条件下进行热压缩试验,研究了20CrMo连铸坯高温变形时的动态再结晶行为。计算得出了动态再结晶的变形激活能和再结晶开始时间,建立了Johnson-Mehl-Avrami型动力学方程。
The hot deformation behavior of 20CrMo alloy steel continuous casting billet was investigated by compression testing on Gleeble-1500D thermal simulator. The peak stress, critical stress, peak strain and critical strain of dynamic recrystallization were calculated directly from true stress-true strain curve by using mathematical methods. The dynamical recrystallization behavior of the steel under hot deformation was investigated. The starting time of dynamic recrystallization was discussed and Johnson-Mehl-Avrami type kinetic equation was obtained.
出处
《热加工工艺》
CSCD
北大核心
2014年第12期110-112,116,共4页
Hot Working Technology
