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借助扭转试验，研究了商品性的Ｃ—Ｍｎ钢和Ｖ微合金钢显微组织的变化，以及在初始静态再结晶测定的基础上判断粗轧和精轧过程中奥氏体的变化。具有试验性的激活能量大小的微合金钢在其再结晶开始被抑制时温度的测定方法得到了发展。通过各种热循环的扭转模拟试验证实了激活能量对普通热轧带钢轧制（粗轧和精轧）中产生的奥氏体变化的影响。人们发现，由于Ｃ—Ｍｎ钢具有所有温度下稳定的激活能量，奥氏体不可能硬化，甚至在接近Ａｒ＿３的精轧温度下都不会硬化。另一方面，在低于临界再结晶温度（９１５℃）下，当汾活能量迅速增加，微合金钢中奥氏体的硬化在这种温度下迅速完成。
With the help of torsion test, the changes of the microstructure of commercially available C-Mn steels and V microalloyed steels were studied, and the changes of austenite during the roughing and finish rolling were judged based on the initial static recrystallization measurements. Microalloyed steels with experimental activation energies have been developed for the determination of temperature at the onset of recrystallisation. The torsional simulation tests of various thermal cycles confirmed the effect of the activation energy on the austenite evolution in the hot strip rolling (roughing and finishing). It has been found that since C-Mn steels have a stable activation energy at all temperatures, austenite can not be hardened and will not harden even at finish rolling temperatures approaching Ar_3. On the other hand, at temperatures below the critical recrystallization temperature (915 ° C), the hardening of the austenite in the microalloyed steel is rapidly completed at this temperature as the amount of active energy rapidly increases.