研究了锻后直接冷却及锻后重新加热到 72 0℃水淬后不同时效温度对轿车用同步器齿环组织和性能的影响。结果表明 :经锻后直接空冷、风冷、灰冷及 72 0℃水淬 +15 0～ 2 0 0℃时效均能满足 α相含量 <5 % ,硬度 (16 8± 8) HB的技术要求 ;2 0 0℃时效 1h的齿环耐磨性优于锻后直接空冷的 ,但空冷工艺简单 ,成本低 ,且其耐磨性与进口齿环的相当 The effect of different aging temperature on the ring structure and performance of synchronizer ring for passenger car after direct forging and forging reheating to 72 0 ℃ water quenching was studied. The results show that the direct air cooling, air cooling, ash cooling and water quenching at 72 0 ℃ +15 0 ~ 200 ℃ can satisfy the requirement of α content less than 5% and hardness of 16 8 ± 8 HB ; The wear resistance of the gear ring after aging at 200 ℃ for 1h is better than direct air cooling after forging, but the air-cooling process is simple, the cost is low, and its wear resistance is comparable with that of the imported gear ring