(1. 北京科技大學 鑄造研究所，北京 100083；
2. 太原科技大學 材料科學與工程學院，太原 030024)
摘 要: 采用蛇形管澆注法制備了半固態(tài)A356鋁合金漿料。結果表明：當澆注溫度為660~680 ℃時，采用蛇形管可以制備出半固態(tài)A356鋁合金組織，且管道內(nèi)沒有出現(xiàn)凝固殼；蛇形管通道的直管段長度對半固態(tài)漿料組織有較大影響，即直管段長度變短后，漿料組織變差，且制備合適半固態(tài)漿料組織的澆注溫度也降低；沿徑向漿料組織的形貌分布不同，由心部的球狀初生α相向過渡區(qū)域的球狀和薔薇狀初生α相的混合組織轉變，邊緣部位為薔薇狀的初生α相組織。
關鍵字: A356鋁合金；半固態(tài)漿料；蛇形管；初生α相
（1.Foundry Institute, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China）
Abstract: The semi-solid feedstock of A356 aluminum alloy was prepared through a serpentine pouring channel. The results indicate that favorable the microstructures of semi-solid A356 aluminum alloy can be generated by a serpentine pouring channel and the solid shell inside the channel can be avoided when the pouring temperature is in the range between 660 ℃ and 680 ℃. The length of the vertical section of the serpentine pouring channel has a significant influence on the microstructures of the feedstock, namely the microstructures of the feedstock become worse when the length of the vertical section is shortened, moreover, the pouring temperature for obtaining the feedstock with suitable microstructure decreases. And some changes occur across the radial microstructures, that is, the spherical grains at the centre transfer to a mixture of spherical and rosette-like grains at the transitional region, then to full rosettes at the edge.
Key words: A356 aluminum alloy; semi-solid feedstock; serpentine pouring channel; primary α phase
