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Casting thermal transforming and semi-solid forming aluminum alloys
Casting thermal transforming and semi-solid forming aluminum alloys
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机译:铸造热变形和半固态成型铝合金
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摘要
A process for casting, thermally transforming and semi-solid forming an aluminum base alloy into an article, the process comprising the steps of: casting a molten body of aluminum base alloy comprising 2 to 5 wt. % Si, 0.3 to 1.7 wt. % Mg, 0.3 to 1.2 wt. % Cu, 0.05 to 0.4 wt. % Fe, and at least one of the group consisting of 0.01 to 1 wt. % Mn, 0. 01 to 0.35 wt. % Cr, max. 0.2 wt. % Ti, max. 0.3 wt. % V to provide a solidified body, the molten aluminum base alloy being solidified at a rate between liquidus and solidus temperatures of the aluminum base alloy to provide a solidified body having a dendritic microstructure. Thereafter, heat is applied to the solidified body to bring the body to a superheated temperature of 3° to 50° C. above the solidus temperature of the aluminum base alloy while maintaining the body in a solid shape and effecting thermal transformation of the body having the dendritic structure when the body is heated to above the solidus temperature. The body, having a non-dendritic structure, is formed in a semi-solid condition into the article.
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