The hardness variation of D2 steel under different quenching temperature and the influence of subzero treatment on hardness of D2 steel were studied,and its microstructure was analyzed as well.

• 研究了D2钢在不同温度淬火后的硬度变化,以及深冷处理对其硬度的影响,并对其显微组织进行了分析。