对27SiMn钢进行820℃亚温淬火+高温回火的工艺研究,并对其显微组织和力学性能进行了分析。结果表明:27SiMn钢经820℃亚温淬火+高温回火的力学性能基本上达到了常规调质处理的水平,可满足矿用液压支柱的缸体的使用性能要求,而且可降低能耗,延长加热炉的使用寿命,有一定的应用推广价值。 27SiMn steel 820 ℃ sub-temperature quenching + high temperature tempering process research, and its microstructure and mechanical properties were analyzed. The results show that the mechanical properties of 27SiMn steel at 820 ℃ after sub-temperature quenching and high-temperature tempering have basically reached the level of conventional quenching and tempering, which can meet the service performance requirements of the cylinders of mining hydraulic props, reduce the energy consumption and extend Furnace life, there is a certain application of promotional value.