利用热力模拟实验技术、OM及SEM等,研究了一种钛微合金高强钢在温度为850～1150℃及应变速率为0.1～10s-1条件下的奥氏体动态再结晶行为.采用最小二乘法回归确定了该微合金钢的热变形激活能和表观应力指数,建立了该微合金钢的热加工方程,并获得了热变形过程中峰值应变、临界应变与Z参数之间的关系.结果表明,峰值应变、临界应变与lnZ之间呈线性关系;在较高温度和较低应变速率条件下该微合金钢易于发生动态再结晶.
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