利用Gleeble-1500热模拟机进行热压缩实验,对T23钢在变形速率为0.01 ～5 s-1,变形温度为1000～1250 ℃的热变形行为和组织进行研究.根据实验获得的真应力-真应变曲线,基于动态材料模型建立了热加工图,并推导出流变应力方程.结果表明:T23钢在热压缩过程中存在动态回复和动态再结晶两种软化机制,变形温度越高或变形速率越小,越容易发生动态再结晶.真应变量为0.5和0.6的加工图具有4个类似的失稳区,功率耗散效率因子的分布规律大致相同,峰值区在1175 ～1240℃和0.03～0.25 s-1范围,对应的峰值效率分别为47.3％(0.5)和46.3％(0.6).流变应力方程中,结构因子A、应力水平参数α、应力指数n分别为5.23×1012 s-1、0.01155 MPa-1和4.46869,热变形激活能为368.65 kJ/mol.
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