(1. 江西理工大學 機電工程學院，贛州341000；
2. 江西理工大學 江西省有色金屬加工技術(shù)工程研究中心，贛州341000)
摘 要: 利用低過熱度澆注技術(shù)制備半固態(tài)A356鋁合金漿料，應(yīng)用Matlab編制計算軟件以及圖像計盒分形維數(shù)的計算方法，研究半固態(tài)A356鋁合金初生相形貌的分形特征。結(jié)果表明：所制備的半固態(tài)A356鋁合金初生相形貌屬于一種分形結(jié)構(gòu)；不同工藝條件制備的初生相形貌有不同的分形維數(shù)，分形維數(shù)大的初生相，其形貌復雜；分形維數(shù)小的初生相，其形貌趨于簡單；半固態(tài)A356合金的凝固過程是一個分形維數(shù)變化的過程。
關(guān)鍵字: A356鋁合金；半固態(tài)；分形特征；初生相
semi-solid A356 Al alloy
（1. Faculty of Mechanical and Electronic Engineering, Jiangxi University of Science and Technology,
Ganzhou 341000, China;
2. Jiangxi Nonferrous Metal Processing Engineering Research Center, Jiangxi University of
Science and Technology, Ganzhou 341000, China）
Abstract: Semi-solid A356 alloy slurry was prepared by low superheat pouring technology, and the fractal characteristics of morphology of primary phase in the alloy was researched by calculating program and computing method for box-counting dimension of images written with Matlab. The results indicate that the morphology of primary phase in semi-solid A356 alloy prepared belongs to fractal structure, and there are different fractal dimensions for the morphologies of primary phases prepared by different technologies, and the primary phase with a big fractal dimension has complicated morphology, and the primary phase with a small fractal dimension has simple morphology. The solidification of semi-solid A356 alloy is a process of fractal dimension change.
Key words: A356 Al alloy; semi-solid; fractal characteristics; primary phase
