利用Gleeble-3800热/力模拟机对Nb-V-Ti低碳微合金钢进行高温单道次热压缩实验,采用基于Murty准则的加工图研究该钢种在变形温度900～1150℃,应变速率0.01～10 s-1,工程应变70％下的组织特性.研究表明:功率耗散效率大于32％的峰区对应变形温度1024～1132℃、应变速率0.18～2.00 s-1,该区域为典型的等轴动态再结晶组织,为最佳热加工区域;失稳区对应900～930℃,0.1～2 s-1以及966～1150℃、1.45～10 s-1两个区域范围.
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