(1. 北京交通大學(xué) 機械與電子控制工程學(xué)院， 北京 100044；
2. 河北科技大學(xué) 材料科學(xué)與工程學(xué)院， 石家莊 050054)
摘 要: 采用電磁攪拌法制備了具有不同微觀組織特征的半固態(tài)A356合金漿料，用圖像分析軟件對澆注前漿料金相試樣的初生相微觀組織特征進行了測定， 利用間接擠壓鑄造方法鑄造阿基米德螺旋線試樣， 以擠壓成形后的螺旋線試樣長度衡量充型能力， 通過多元回歸，建立了半固態(tài)A356合金初生相微觀組織特征與充型長度之間的數(shù)學(xué)表達式。 結(jié)果表明： 半固態(tài)漿料充型能力不僅與初生相微觀組織特征參數(shù)有關(guān)，微觀組織特征參數(shù)的交互作用對充型能力的影響也較大。 利用該表達式可以對半固態(tài)漿料充型能力進行預(yù)測， 進而指導(dǎo)半固態(tài)漿料制備參數(shù)設(shè)計、 間接擠壓鑄造工藝設(shè)計和缺陷預(yù)測。
關(guān)鍵字: 半固態(tài) A356合金； 擠壓鑄造； 微觀組織； 充型能力
semi-solid A356 alloy on filling ability
LI Zeng-min2，LI Xun2，CAO Feng-jiang2
（ 1. College of Mechanical and Electronic Control Engineering，
Beijing Jiaotong University，Beijing 100044，China；
2. College of Materials Science and Engineering，
Hebei University of Science and Technology，Shijiazhuang 050054，China）
Abstract: The method of electromagnetic strring was adopted to produce the semi-solid A356 alloy slurry which has different microstructure characteristic, the image analysis software was used to mensurate the microstructure characteristics of the primary phase of slurry metallographic specimen before pouring, and the indirect squeeze casting method was used to produce the archimedean spiral line sample, accordingly the length of spiral line sample after squeeze forming was used to weigh the filling ability, the mathematic representation between the microstructure characteristics of primary phase of semi-solid A356 alloy slurry and filling length via multivariant regression was setup. The result indicates that the filling ability of semi-solid slurry not only has the relation with the microstructure characteristic parameter of primary phase, but is also affected by the interaction of microstructure characteristic parameter greatly. This expression can forecast the filling ability of semi-solid slurry, and then guide the semi-solid slurry produce parameter's design, indirect squeeze casting craft design and failure prediction.
Key words: semi-solid A356 alloy； squeeze casting； microstructure； filling ability
