利用Gleeble-3500热模拟试验机,研究了含铌低合金高强钢在900～1100℃,应变速率为0.1、1和5s-1,真应变至0.7的热压缩变形行为.基于实验数据,得到材料本构方程和表征动态再结晶的参数.运用Cingara-McQueen方程建模预测流变应力并验证.结果表明,高温低应变速率条件下动态再结晶是材料主要软化机理,峰值应力与Z参数成线性关系.由热加工图得到,当应变速率在0.1 ～0.67 s-1,温度在1030～1100℃范围内材料加工性能良好.
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