转动输送管制备半固态A380浆料研究

Research on Preparation of Semi-solid A380 Alloy Slurry by Rotating Duct

采用转动输送管流变制浆工艺生产A380,获得了符合金属半固态加工要求的细小、近球状的非枝晶组织。主要考查了不同的浇注温度和输送管转动速度对合金微观组织形成过程的影响。结果表明,采用转动输送管技术可以制备具有良好组织的A380合金半固态浆料,适量提高输送管转动速度或降低浇注温度,半固态组织的固相颗粒会变得细小、均匀和圆整。

The primary microstructure with fine near ball nondendritic grain by semi-solid forming was obtained in preparation of the rheocasting slurry of alloy A380 by method of rotating duct. The influence of different pouting temperatures and rotating speeds of duct on semi-solid slurry of alloy A380 was investigated. The results show that the semi-solid slurry of alloy A380 with good microstructure can be obtained by the process of rotating duct; the solid particles become finer, more homogeneous and rounder with the decrease of pouring temperatures or the increase of rotating speeds of the duct.