Aluminum alloy casting having high strength and high toughness a

Details Aluminum alloy casting having high strength and high toughness a Aluminum alloy casting having high strength and high toughness a

1991-11-29

1994-03-29

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

With casting or solidifying from melt

148698, 148700, 148417, 148439, C22F 104

Patent

active

052980944

ABSTRACT:
Disclosed are an aluminum alloy casting having a high strength and a high toughness, and a production process for the same. The aluminum alloy casting comprises silicon (Si) in an amount of 2.5 to 4.4% by weight, copper (Cu) in an amount of 1.5 to 2.5% by weight, magnesium (Mg) in an amount of 0.2 to 0.5% by weight and the balance of aluminum (Al), and a matrix thereof includes a dendrite which has a size of 30 micrometers or less. Since the Si addition amount is suppressed as less as possible and since the size of the dendrite is micro-fined in the aluminum alloy casting, the toughness is improved remarkably. Further, since the Cu and Mg are added in the predetermined addition amounts, the strength is enhanced in the aluminum alloy casting. In addition, a solution treatment which is employed in the production process can further enhance the strength of the aluminum alloy casting.

REFERENCES:
patent: 1924727 (1933-08-01), Rowe et al.
patent: 4336076 (1982-06-01), Edamura et al.
patent: 4419143 (1983-12-01), Ito et al.
patent: 4786340 (1988-11-01), Ogawa et al.
patent: 4808374 (1989-02-01), Awano et al.
"Effect of Solution Treatment Parameters on Tensile Properties of Cast Aluminum Alloys" by S. Shiykumar et al., 6057 Journal of Heat Treating, vol. 8, pp. 63-70, No. 1, 1990.

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