(中南工业大学 非平衡材料科学与工程研究所， 长沙 410083)
摘 要: 提出了一种新的材料制备工艺——固液混合铸造工艺，即在过热合金熔体中加入大量同种合金粉末或润湿性好的异种合金粉末，强烈均匀搅拌， 然后进行铸造或各种热加工的一种材料制备工艺。 通过对三种AlSi合金的固液混合铸造研究，在所实验的工艺条件下，当粉末添加质量与合金溶体质量之比为1左右时，过共晶合金析出的初晶硅平均粒径可控制在5 [KG-*6]μm以下，亚共晶合金中α相的平均粒径可控制在10 μm以下。 研究表明，该工艺具有一定的先进性和优越性，可能存在一定的应用价值。
关键字: 固液混合铸造； 粉末； 熔体； Al-Si合金
（Non-equilibrium Material Research Institute,Central South University of Technology, Changsha 410083, P.R.China）
Abstract:A novel material preparation technology——solid-liquid mixing casting technology was presented. Using this technology, a large amount of homogeneous alloy powder or heterogenous powder with perfect wettability were added into the superheated melt, then strongly agitated, cast or hot processed. By solidliquid mixing casting, three kinds of Al-Si alloy were investigated. Experimental results show that, when the proportion of powder accession quantity to alloy melt is about 1, the mean size of primary Si in hypereutectic alloy is under 5μm, and the mean grain size of α phase in hypoeutectic alloy is under 10μm; this technology has its advantages, and may be practicable and valuable.
Key words: solidliquid mixing casting； powders； melt; Al-Si alloy
