本文介绍了新研制的以聚丙烯酸盐为基的加入少量添加剂组成的PAS—3水溶性淬火介质。测定了其物理性能参数和冷却曲线。并结合汽车、拖拉机活塞销于渗碳后淬火,在代替淬火用油试验方面进行了硬度、金相组织、内应力和疲劳性能等对比试验,获得比较满意的效果。本介质无毒、不燃烧、不产生烟雾、无异味、冷却性能良好,使用温度范围可在20～60℃之间。 This article describes the newly developed polyacrylate-based PAS-3 water-soluble quenching medium with a small amount of additives. The physical properties and cooling curves were measured. Combined with the car, the tractor piston pin in the carburizing after quenching, in place of quenching oil test hardness, microstructure, internal stress and fatigue performance and other comparative tests to obtain more satisfactory results. The medium is non-toxic, does not burn, does not produce smoke, no smell, good cooling performance, the use of temperature range of 20 ~ 60 ℃.