对ＦｅＷＣｏ和ＦｅＷＣｏＮｉ合金的时效硬化特性进行了研究。结果表明两种合金均具有强的时效硬化能力。ＦｅＷＣｏＮｉ低温硬化速率较ＦｅＷＣｏ高。随着时效温度升高，ＦｅＷＣｏ硬化速率迅速上升。ＦｅＷＣｏ合金６３０℃时效１０ｍｉｎ，硬度从淬火态的４７ＨＲＣ上升到６４ＨＲＣ。淬火组织为具有高位错密度的板条马氏体。时效初期出现调幅结构，产生较大共格应力。５７０℃×２ｈ时效，ＦｅＷＣｏ的析出物比ＦｅＷＣｏＮｉ更为弥散细小。这是ＦｅＷＣｏ合金较ＦｅＷＣｏＮｉ合金有较强时效硬化能力的原因。 The age hardening properties of FeWCo and FeWCoNi alloys were studied. The results show that both alloys have strong age hardening ability. Fe  W  Co  Ni low temperature hardening rate higher than Fe  W  Co. With aging temperature, Fe  W  Co hardening rate increased rapidly. Fe  W  Co alloy aging at 630 ℃ 10min, hardness quenching 47HRC increased to 64HRC. The quenched structure is lath martensite with a high dislocation density. Aging early amplitude modulation structure, resulting in greater coherent stress. 570 ℃ × 2h aging, FeWCo precipitates FeWCoNi more dispersed small. This is the reason that FeWCo alloy has stronger age hardening ability than FeWCoNi alloy.