US3988176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy for mold
Assignee: Kanadevia Corp
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Filing: 1974-07-26
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Granted: 1976-10-26
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Expires: 1994-07-26
Abstract
Abstract A mold for continuous casting made of a copper alloy having been subjected to 15 to 40% cold working, said alloy consisting of copper as main constituent and an addition of 0.18 to 0.85% by weight of tin, and, if desired, several other metal components, the alloy having a high softening temperature and high-temperature strength, whose numerical values are given by specific formulas in which the thermal conductivity λ is a determining factor which, in itself, is dependent on the construction of the mold, operating conditions etc.
Inventors
- 👤 Seizo Watanabe
- 👤 Koji Kitazawa
- 👤 Minoru Maeda
- 👤 Masaru Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:00
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/04; B22D11/059; C; C22; C22C; C22C9/00; C22C9/02; C22C9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
A mold for continuous casting made of a copper alloy having been subjected to 15 - 40% of cold working, the thermal conductivity of the alloy being 40 to 75% of that of pure copper, the alloy consisting of copper as main constituent, 0.18 to 0.4% by weight of tin, 0 to 0.22% of magnesium, 0.3 to 0.7% of silicon, 0.45 to 2.5% of nickel, 0.02 to 0.15% of silver and 0.02 to 0.15% of lithium, and having a softening temperature and high-temperature strength of the numerical values given by the formulas (1) and (2) T ≧ 1400C λ.sup..sup.-A ( 1) s ≧ 274c λ.sup..sup.-b ( 2) wherein A = 0.1 to 0.9, B = 0.2 to 1.0, C = 0.5 to 3, T is the softening temperature (°C) required of the mold material, S is the high-temperature strength (kg/mm 2 ) required of the mold material, and λ is the thermal conductivity (%) of the mold when the thermal conductivity of a pure copper mold is assumed to be 100%, each of A, B and C being constant to be determined in accordance with the construction of the mold, operation conditions, and the like.
Claim 2
Dependent Claim
195 words
A mold for continuous casting made of a copper alloy having been subjected to 15 - 40% of cold working, the thermal conductivity of the alloy being 40 to 75% of that of pure copper, the alloy consisting of copper as main constituent, 0.18 to 0.4% by weight of tin, 0 to 0.22% of magnesium, 0.3 to 0.7% of silicon, 0.45 to 2.5% of nickel, 0.02 to 0.15% of silver and 0.02 to 0.15% of lithium, and having a softening temperature and high-temperature strength of the numerical values given by the formulas (1) and (2) T ≧ 1400C λ.sup..sup.-A ( 1) s ≧ 274c λ.sup..sup.-b ( 2) wherein A = 0.1 to 0.9, B = 0.2 to 1.0, C = 0.5 to 3, T is the softening temperature (°C) required of the mold material, S is the high-temperature strength (kg/mm 2 ) required of the mold material, and λ is the thermal conductivity (%) of the mold when the thermal conductivity of a pure copper mold is assumed to be 100%, each of A, B and C being constant to be determined in accordance with the construction of the mold, operation conditions, and the like.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |