采用盐浴法对Al含量较高的TRIP800钢进行了Q&P(quenching and partitioning)工艺处理,研究淬火终点温度和分配时间对试验钢的显微组织、力学性能和残留奥氏体含量的影响.结果表明:试验钢的显微组织为铁素体基体上分布着块状马氏体或马氏体-奥氏体的混合组织,随着淬火终点温度的降低或分配时间的延长,马氏体或马-奥组织的微观形貌会发生变化;分配时间较短的试样综合力学性能更好,在淬火终点温度为250℃,分配时间为60 s时得到的试样强塑积最高,可达22238 MPa·％;试样的拉伸断口显示出良好的韧性断裂特征;在Q&P处理后试验钢的残留奥氏体含量大幅提高.
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