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在Al-5%Fe合金凝固过程中施加机械振动,研究了机械振动参数(如振幅、振动频率)、模具预热温度及浇注温度对其凝固组织的影响。结果表明,通过控制机械振动参数和凝固条件可有效细化Al-5%Fe合金的凝固组织,A13Fe相由粗大的长针状转变为细针状或短杆状;随着振幅和振动频率的升高,合金的凝固组织逐渐细化,且振幅细化效果优于振动频率;在200~800℃范围内,凝固组织随模具预热温度的升高逐渐粗化;在800~890℃范围内,随浇注温度升高,A13Fe组织先细化后又粗化,830℃时细化效果最好。
The mechanical vibration was applied during the solidification of Al-5% Fe alloy. The influence of mechanical vibration parameters (such as amplitude and vibration frequency), preheating temperature of mold and pouring temperature on the solidified microstructure were studied. The results show that the solidified microstructure of Al-5% Fe alloy can be effectively refined by controlling the mechanical vibration parameters and the solidification conditions. The A13Fe phase changes from coarse long needle to fine needle or short rod. With the amplitude and vibrational frequency The solidification microstructure of the alloy is gradually refined and the amplitude refinement effect is better than the vibration frequency. In the range of 200 ~ 800 ℃, the solidified microstructure gradually coarsens with the increase of the mold preheating temperature; in the range of 800 ~ 890 ℃ With the increase of pouring temperature, the A13Fe microstructure was refined and then roughened, and the refinement effect was the best at 830 ℃.