Silicon-aluminum intermediate alloy AlSi50 and preparation method thereof

Abstract

The invention discloses a silicon-aluminum intermediate alloy AlSi50 and a preparation method thereof. The silicon-aluminum intermediate alloy AlSi50 comprises the following components in percentage by mass: 48-52% of aluminum elements and 48-52% of silicon elements; used raw materials are aluminum ingots with the aluminum content more than 99.70% and silicon with the silicon content more than 99.98%; the mass ratio of the aluminum ingots to the silicon is 100: 92.31-108.33; and the aluminum ingots and the silicon are molten, reacted, sampled, analyzed and cast to obtain the silicon-aluminum intermediate alloy AlSi50. The silicon-aluminum intermediate alloy AlSi50 reduces the open fire risk and the harmful gas poisoning risk, prevents the workshop gas and harmful particle pollution, is free of environmental pollution, shortens the production period, guarantees the alloy component consistency, and improves the quality of the silicon-aluminum intermediate alloy AlSi50; the silicon content of the cast silicon-aluminum intermediate alloy AlSi50 reaches 48-52%, and is two times of the silicon content in a national standard traditional process; and the silicon-aluminum intermediate alloy AlSi50 is complete in performance and excellent in toughness.

Description

technical field [0001] The invention relates to the preparation of an aluminum-based master alloy, specifically an aluminum-silicon master alloy AlSi 50 and its preparation method. Background technique [0002] In the current non-ferrous metal industry standards of the People's Republic of China, the standard for aluminum-silicon master alloys is only aluminum-silicon master alloy AlSi 24 , AlSi 20 and AlSi 12 , aluminum-silicon master alloy AlSi 24 Composition standard: Si content is 22.0-26.0wt%, the balance is Al, impurity Cu content≤0.20%, Mn content≤0.35%, Ti content≤0.10%, Ni content≤0.20%, Cr content≤0.10%, Fe content Content ≤0.45%, Zn content ≤0.20%, Mg content ≤0.40%, Pb content ≤0.10%, Sn content ≤0.10%, melting temperature is 700-800℃, with brittle characteristics; aluminum-silicon master alloy AlSi 20 Composition standards: Si content is 18.0-21.0%, the balance is Al, impurity Cu content ≤0.20%, Mn content ≤0.35%, Ti content ≤0.10%, Ni content ≤0.20%, Cr co...

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Problems solved by technology

The silicon content of the aluminum-silicon master alloy prepared by the national standard production process is relatively low, and the alloy is brittle and has poor toughness