(中南工業(yè)大學(xué) 非平衡材料科學(xué)與工程研究所， 長沙 410083)
摘 要: 提出了一種新的材料制備工藝——固液混合鑄造工藝，即在過熱合金熔體中加入大量同種合金粉末或潤濕性好的異種合金粉末，強烈均勻攪拌， 然后進行鑄造或各種熱加工的一種材料制備工藝。 通過對三種AlSi合金的固液混合鑄造研究，在所實驗的工藝條件下，當粉末添加質(zhì)量與合金溶體質(zhì)量之比為1左右時，過共晶合金析出的初晶硅平均粒徑可控制在5 [KG-*6]μm以下，亞共晶合金中α相的平均粒徑可控制在10 μm以下。 研究表明，該工藝具有一定的先進性和優(yōu)越性，可能存在一定的應(yīng)用價值。
關(guān)鍵字: 固液混合鑄造； 粉末； 熔體； 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
