(北京科技大學(xué) 材料科學(xué)與工程學(xué)院， 北京 100083)
摘 要: 研究了電磁感應(yīng)重熔加熱對(duì)半固態(tài)AlSi7Mg合金連鑄坯料溫度場(chǎng)和組織的影響。結(jié)果表明：通過(guò)調(diào)整加熱功率，可使半固態(tài)AlSi7Mg合金連鑄坯料的溫度場(chǎng)均勻一致，保證坯料的徑向溫度差小于1 ℃；電磁感應(yīng)重熔加熱的半固態(tài)AlSi7Mg合金連鑄坯料中的初生α(Al)細(xì)小、圓整、分布均勻，但重熔過(guò)程不能改變坯料表層組織中初生α(Al)枝晶的基本形態(tài)。
關(guān)鍵字: 鋁合金； 半固態(tài)； 電磁感應(yīng)加熱；溫度場(chǎng)； 組織
（School of Materials Science and Engineering， University of Science and Technology Beijing， Beijing 100083, P.R.China）
Abstract:The effect of electromagnetic induction heatingon the temperature field and the microstructures in the nondendritic semisolid AlSi7Mg alloy billets cast continuously was investigated. The results show that the homogeneous temperature field in the nondendritic semisolid AlSi7Mg alloy billets can be obtained through adjusting the induction power, and the temperature difference in radial direction is less than 1 ℃. The results also show that the primary α (Al) phases in the billets heated inductively are small， spherical and distributed evenly in the microstructures， but the dendritic primary α(Al) phases in the peripheral layer of the billets cannot be changed basically.
Key words: aluminium alloy; semisolid; induction heating; temperature field; microstructure
