(1. 上海交通大学 模具CAD国家工程研究中心, 上海 200030；
2. Osaka University, Yamada oka 2-1,Suita, Osaka, Japan)
摘 要: 采用半固态合金二次加热，对半固态坯料施加合理的二次加热路径， 重新获得适于后续加工的具有近球状固相颗粒均匀分布的半固态组织。 采用功率为20kW， 频率为30kHz的高频感应加热装置， 研究了采用再熔融加热法制备的ZL101半固态合金坯料的二次加热过程。 结果表明：为了获得适于最终成形的半固态组织， 有必要把半固态坯料二次加热过程分为几个加热速率不同的加热阶段， 然后在半固态温度区间某一需要加工温度下进行适度保温。 通过实验给出了ZL101合金半固态坯料二次加热条件， 并讨论了二次加热条件对半固态组织演化的影响。
关键字: 再熔融加热法；半固态合金； 二次加热； 组织演化
（1. National Die and Mold CAD Engineering Research Center,
Shanghai Jiaotong University, Shanghai 200030, China;
2. Osaka University, Yamada oka 2-1, Suita, Osaka, Japan）
Abstract:By reheating the semi-solid microstructure with spheroidal solid particles distributed uniformly in the liquid phase can be obtained. The reheating conditions of the semi-solid billet of ZL101 alloy produced by re-melting heat treatment method were studied. The rational reheating route including optimal holding time was obtained through reheating experiments using a high frequency heater with power of 20kW and frequency of 30kHz. The results show that it is necessary to divide the whole reheating process into several heating stages with different heating rates in order to obtain satisfactory semi-solid structure before final forming. Finally, the structure evolution during reheating process was discussed.
Key words: re-melting heat treatment method; semi-solid alloys; reheating; structure evo
