试验钢经热轧后,采用超快速冷却系统冷至不同温度(Ms～M1之间的某温度)后随炉冷却,研究卷取温度对DQ&P钢组织性能的影响.结果表明,随着卷取温度由200℃升高至360℃,试验钢中铁素体含量略有增加,残余奥氏体体积分数由5.9％增加至12.1％.拉伸变形后,200℃卷取温度下,试验钢的残余奥氏体含量没有变化,而在360℃卷取温度条件下,残余奥氏体体积分数减少为8.5％.卷取温度为360℃时可获得极佳的综合力学性能,伸长率达到23.9％,强塑积达到20 GPa·％,且屈强比低至0.79.
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