为了研究低合金高强钢的形变奥氏体连续冷却转变行为及组织变化规律，利用Gleeble-3800热力模拟试验机对试验钢进行了多道次轧制工艺模拟试验，并根据试验所得相变温度和各冷却速度下的室温组织相对量，回归出相变模型。结果表明，试验钢在变形后的连续冷却过程中发生铁素体、珠光体、贝氏体和马氏体转变，基于对各转变的温度和组织相对量得到的相变模型分析，证实了模型的可靠性。

Multipass deformation simulation tests were performed on a high strength low alloy (HSLA) steel by using a Gleeble3800 thermomechanical simulator to study the continuous cooling transformation behaviors and the resultant microstructures. Based on the transformation temperatures or transformed microstructure volume fractions，the models for phase transformation of the tested steel were constructed. The results showed that there were ferrite，pearlite，bainite and martensite transformation occurring in the high strength low alloy steel. And the validity of the models for phase transformation temperatures or microstructure volume fractions resulting from the experimental data was confirmed.