利用Gleeble-3800型热模拟试验机测定了DP600双相钢压缩变形后动态连续冷却转变（CCT）曲线，并模拟其热轧生产工艺过程以研究轧制工艺参数对显微组织的影响，进而优化轧制工艺参数结果表明：CCT曲线上存在独立的铁素体区和贝氏体区，在两区中间存在较宽的奥氏体稳定区；轧制工艺参数对显微组织有明显的影响，试验钢850℃终轧后以1℃·s^-1的冷却速率从750℃冷至710℃后再快冷至600℃卷取所得到钢板的显微组织最优。
Dynamic continuous cooling transformation （CCT） curves of DP600 steel were determined on Gleeble-3800 thermal simulator. The hot rolled process were simulated to study the effect of rolling parameters on microstructure, and to optimize rolling parameters. The results show that there were self-exist ferrite region and bainite region on CCT curves, and broader steady austenite region existed in the region above-mentioned. The effect of the rolling parameters on the microstructure was obvious, and the best microstructure was obtained when the tested steel was cooled from 750 ℃ to 710 ℃ at a cooling rate of 1 ℃ · s^-1 , and then cooled quickly to 600℃ to coil after end-rolling at 850 ℃.
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