Casting, thermal transforming and semi-solid forming aluminum al

Details Casting, thermal transforming and semi-solid forming aluminum al Casting, thermal transforming and semi-solid forming aluminum al

1995-04-14

1996-11-05

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

With casting or solidifying from melt

148552, C22F 104

Patent

active

055713467

ABSTRACT:
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 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 in a range of 5.degree. to 100.degree. C./sec. to provide an entire solidified body having a denditic microstructure. Thereafter, heat is applied to the solidified body to bring the body to a superheated temperature of 3.degree. to 50.degree. C. above the solidus temperature of the aluminum base alloy while maintaining a body in a solid shape and effecting thermal transformation of the body having the dendritic structure when the entire body is uniformly heated to the superheated temperature. The body having a non-dendritic structure is formed in a semi-solid condition into the article.

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