Method and apparatus for forming an aluminum alloy composite mat

Details Method and apparatus for forming an aluminum alloy composite mat Method and apparatus for forming an aluminum alloy composite mat

1995-10-25

1997-09-23

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164 98, B22D 1914

Patent

active

056694342

ABSTRACT:
A method for producing an aluminum alloy composite material comprises disposing in a mold, in sequence from bottom to top, an infiltration enhancer containing Mg, a preform and an aluminum matrix alloy ingot, and then inserting the mold into an atmospheric furnace. The interior of the atmospheric furnace is then turned into an argon atmosphere. Thereafter, the internal temperature of the furnace is raised to a first predetermined temperature which is maintained for a given period of time so that the infiltration enhancer sublimates to permit the Mg component thereof to infiltrate into the preform. The atmosphere inside the furnace is then turned from the argon atmosphere into a nitrogen atmosphere. Thereafter, the internal temperature of the furnace is raised to a second predetermined temperature higher than the first predetermined temperature and maintained for a given period of time so that the aluminum matrix alloy ingot melts to permit the aluminum matrix alloy to spontaneously infiltrate into the preform. The interior of the furnace is then cooled to thereby produce an aluminum alloy composite material of high-quality.

REFERENCES:
patent: 5007475 (1991-04-01), Kennedy et al.
patent: 5119864 (1992-06-01), Langensiepen et al.
patent: 5505248 (1996-04-01), Aghajanian et al.

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