(1. 南昌大學(xué)，材料科學(xué)與工程學(xué)院，南昌330031;
2. 南昌大學(xué)，機(jī)電工程學(xué)院，南昌 330031)
摘 要: 提出一種制備半固態(tài)漿料的新方法—擺動(dòng)振蕩法。采用該方法制備了A356鋁合金的漿料。結(jié)果表明：擺動(dòng)振蕩可有效地防止穩(wěn)定凝固殼的形成，可制備出組織優(yōu)良的半固態(tài)漿料，其初生α(Al)的等效直徑在60 μm以下，形狀因子可達(dá)0.8以上，特別地，可以大幅度提高澆注溫度。
關(guān)鍵字: A356合金；半固態(tài)成形；擺動(dòng)振蕩；凝固；晶粒細(xì)化
A356 aluminum alloy
（1. School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China;
2. School of Mechatronic Engineering, Nanchang University, Nanchang 330031, China）
Abstract:A new method of angular oscillation (AO) to produce sound semi-solid slurry for rheoforming was proposed. The semi-solid slurry preparation of A356 aluminum alloy was carried out, applying this method of AO. The results show that the limited angular oscillation can prevent the formation of solid skin effectively; the sound semi-solid slurry can be obtained by properly controlling inclined angle of barrel and oscillation intensity. The primary α(Al) particles have an average diameter smaller than 60 μm and an average shape factor larger than 0.8. Especially, the superheat temperature of melt can be increased to a higher temperature.
Key words: semi-solid processing; angular oscillation; solidification; grain refinement; A356 alloy
