采用光学显微镜、场发扫描电镜和X射线衍射仪研究了配分温度对低碳高强Q&P钢的组织演变规律,并分析了配分温度对其力学性能和残留奥氏体含量的影响.结果表明:实验用钢0.20C-1.28Mn-0.37Si经过Q&P处理后,随着配分温度的升高,其抗拉强度逐渐降低,伸长率先升高后降低,在配分温度400℃时,强塑积达到最大22610 MPa·％;随配分温度的升高,析出的碳化物开始聚集长大,并消耗了马氏体中扩散的碳,使残留奥氏体的含量降低,残留奥氏体含量在400℃时达到最大的体积分数5.3％,试样拉伸断口形貌具有典型的韧窝状特征.
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