IPC분류정보
국가/구분 |
United States(US) Patent
공개
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0789410
(2001-02-20)
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공개번호 |
US-0028861
(2001-10-11)
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발명자
/ 주소 |
- Fang, Que-Tsang
- Shabel, Barrie S.
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
0 |
초록
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There is claimed an alloy composition for castings, especially vehicle wheels. This cast composition is chromium-free, zirconium-free and consists essentially of: about 4-7 wt. % zinc, more preferably, about 4-5 wt. % zinc; about 1.2-1.8 wt. % magnesium; at least one of about 0.3-0.6 wt. % manganese
There is claimed an alloy composition for castings, especially vehicle wheels. This cast composition is chromium-free, zirconium-free and consists essentially of: about 4-7 wt. % zinc, more preferably, about 4-5 wt. % zinc; about 1.2-1.8 wt. % magnesium; at least one of about 0.3-0.6 wt. % manganese and 0.1-0.25 wt. % copper; up to about 0.25 wt. % iron; and up to about 0.25 wt. % silicon, the balance aluminum and incidental impurities. Products made from this alloy exhibit fatigue properties equal to or greater than those for a 6061-T6 forging, typically about 850,000 cycles at about 12.5 ksi; and about 330,000 cycles at about 20 ksi. They also exhibit a typical T6 tensile yield strength of about 50 ksi or higher.
대표청구항
▼
1. A shaped casting made from a chromium-free, zirconium-free, aluminum alloy exhibiting improved fatigue performance and a typical T6 yield strength of about 50 ksi or higher, said casting consisting essentially of: about 4-7 wt. % zinc, about 1.2-1.8 wt. % magnesium, at least one of about 0.3-0.6
1. A shaped casting made from a chromium-free, zirconium-free, aluminum alloy exhibiting improved fatigue performance and a typical T6 yield strength of about 50 ksi or higher, said casting consisting essentially of: about 4-7 wt. % zinc, about 1.2-1.8 wt. % magnesium, at least one of about 0.3-0.6 wt. % manganese and 0.1-0.25 wt. % copper, up to about 0.25 wt. % iron, and up to about 0.25 wt. % silicon, the balance aluminum and incidental impurities. 2. The shaped casting of claim 1 wherein said alloy contains about4-5wt. % zinc. 3. The shaped casting of claim 1 wherein said alloy contains less than about 0.15 wt. % silicon and less than about 0.15 wt. % iron. 4. The shaped casting of claim 1 wherein said alloy has fatigue properties equivalent to or greater than: about 850,000 cycles at about 12.5 ksi; and about 330,000 cycles at about 20 ksi. 5. A shaped casting aluminum alloy which has fatigue properties equivalent to or greater than about 850,000 cycles at about 12.5 ksi; and about 330,000 cycles at about 20 ksi and a typical T6 yield strength of about 50 ksi or higher, said casting being chromium-free, zirconium-free and consisting essentially of: about4-7wt. % zinc, about 1.2-1.8 wt. % magnesium, at least one of about 0.3-0.6 wt. % manganese and 0.1-0.25 wt. % copper, up to about 0.25 wt. % iron, and up to about 0.25 wt. % silicon, the balance aluminum and incidental impurities. 6. The alloy of claim 5 which contains about 4-5 wt. % zinc. 7. The alloy of claim 5 which contains less than about 0.15 wt. % silicon and less than about 0.15 wt. % iron. 8. A vehicle wheel cast from a chromium-free, zirconium-free aluminum alloy consisting essentially of: about 4-7 wt. % zinc, about 1.2-1.8 wt. % magnesium, at least one of about 0.3-0.6 wt. % manganese and 0.1-0.25 wt. % copper, up to about 0.25 wt. % iron, and up to about 0.25 wt. % silicon, the balance aluminum and incidental impurities, said cast wheel having a typical T6 yield strength of about 50 ksi or higher. 9. The vehicle wheel of claim 8 which contains about 4-5 wt. % zinc. 10. The vehicle wheel of claim 8 which contains less than about 0.15 wt. % silicon and less than about 0.15 wt. % iron. 11. The vehicle wheel of claim 8 wherein said vehicle is a mid-size truck. 12. A vehicular structural component cast from a chromium-free, zirconium-free aluminum alloy consisting essentially of: about 4-7 wt. % zinc, about 1.2-1.8 wt. % magnesium, at least one of about 0.3-0.6 wt. % manganese and 0.1-0.25 wt. % copper, up to about 0.25 wt. % iron, and up to about 0.25 wt. % silicon, the balance aluminum and incidental impurities, said cast structural component having a T6 tensile yield strength of about 50 ksi or higher. 13. The vehicular structural component of claim 12 which contains about 4-5 wt. % zinc. 14. The vehicular structural component of claim 12 which contains less than about 0.15 wt. % silicon and less than about 0.15 wt. % iron. 15. The vehicular structural component of claim 12 which is a control arm. 16. The vehicular structural component of claim 12 which is a steering knuckle. 17. The vehicular structural component of claim 12 which is a differential carrier.
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