Process for casting aluminum alloys

Details Process for casting aluminum alloys Process for casting aluminum alloys

1987-10-15

1988-08-30

Godici, Nicholas P.

Metal founding

Process

Shaping a forming surface

106 3822, 106 3827, 164 35, 164 72, 164138, 427133, B22C 300

Patent

active

047669489

ABSTRACT:
Improved small dendrite arm spacings and good technical values, regarding the technical properties of aluminum alloys, particularly tensile strength, yield strength and elongation percent, can be reliably obtained by refining the grain of the casting to provide the smallest possible spacings between the secondary dendrite arms, by casting the aluminum alloys in a ceramic mold provided with numerous micro-sized rough spots and pores and to the inner wall of which mold after it is dried and fired has been applied a thin layer of a salt mixture in which the cations are primarily from the alkalis and/or alkaline earths and the anions are primarily from halogens and which applied salt mixture has a liquidus temperature lower than the casting temperature of the alloy.

REFERENCES:
patent: 1347481 (1920-07-01), Jeffries
patent: 2435121 (1948-01-01), Bean
patent: 3157926 (1964-11-01), Horton et al.
patent: 3587713 (1971-06-01), Halsey
patent: 4557316 (1985-12-01), Takayanagi et al.
Brunnhuber, E. Light Metal and Heavy Metal Chill Casting (German), 1966, pp. 178-181.

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