High strength and toughness aluminum alloy casting by high-press

Details High strength and toughness aluminum alloy casting by high-press High strength and toughness aluminum alloy casting by high-press

1996-08-26

1998-12-08

Yee, Deborah

Metal treatment

Stock

Aluminum base

148549, 420535, C22C 2108, C22C 2110

Patent

active

058463488

ABSTRACT:
An aluminum alloy cast molding produced by a high-pressure casting method, and having a composition containing Si in an amount of 0.6 to 1.0% by weight (which will be hereinafter simply referred to as %), Cu in an amount of 0.6 to 1.2%, Mg in an amount of 0.8 to 1.2%, Zn in an amount of 0.4 to 1.2%, Ti in an amount of 0.01 to 0.20%, and B in an amount of 0.002 to 0.015%, with the remainder being aluminum and inevitable impurities. The maximum dendrite cell size of the metal structure of the aluminum alloy casting is limited to 60 .mu.m or less. The present invention also provides a method of manufacturing an aluminum alloy casting by high-pressure casting, which manufacturing method includes the steps of charging a mold with a molten aluminum alloy having the above alloy composition, and subsequently solidifying the charged molten metal under pressures as high as 500 Kgf/cm.sup.2 or above so that the maximum dendrite cell size of the metal structure of the aluminum alloy casting is limited to 60 .mu.m or less.

REFERENCES:
patent: 5571347 (1996-11-01), Bergsma

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