Patent US4057098A successfully refreshed from Google Patents.
US4057098A
Expired / Lapsed
US
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Method of producing thin-walled castings
Assignee: Individual
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Filing: 1976-06-21
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Granted: 1977-11-08
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Expires: 1996-06-21
Abstract
Abstract A method of producing castings comprising the steps of: pouring moulds with inoculated cast iron containing, by weight per cent: carbon 3.6-3.8, silicon 2.8-3.2, manganese up to 0.4, magnesium not more than 0.01, at a melt temperature ranging from 1420° to 1450° C, and subsequently cooling the cast iron. The thickness of walls of the castings is chosen so that the initial cooling rate is 10°-14° C/sec with a preset heat conductivity.
Inventors
- 👤 Boris Pavlovich Platonov
- 👤 Anton Abramovich Ryzhikov
- 👤 Jury Borisovich Platonov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:48
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10; B; B22; B22D; B22D1/00; B22D15/00; B22D15/02; B22D27/00; B22D27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A method of producing castings having thin walls and thick walls comprising the steps of: pouring inoculated cast iron consisting essentially of, by weight, 3.6-3.8% carbon, 2.8-3.2% silicon, up to 0.4% manganese, not more than 0.01% magnesium and the remainder being iron at a melt temperature within the range of from 1420° to 1450° C into moulds; and subsequently cooling portions of the cast iron with thin walls of the castings being up to 3 mm that the initial cooling rate is 10°-14° C/sec to form nodular cast iron in the thin-walled portions and simultaneously cooling portions of the cast iron with thick walls of the castings of a thickness that the initial cooling rate is 1°-4° C/sec to form gray cast iron in the thick-walled portions.
Claim 2
Independent Claim
127 words
A method of producing castings having thin walls and thick walls comprising the steps of: pouring inoculated cast iron consisting essentially of, by weight, 3.6-3.8% carbon, 2.8-3.2% silicon, up to 0.4% manganese, not more than 0.01% magnesium and the remainder being iron at a melt temperature within the range of from 1420° to 1450° C into moulds; and subsequently cooling portions of the cast iron with thin walls of the castings being up to 3 mm that the initial cooling rate is 10°-14° C/sec to form nodular cast iron in the thin-walled portions and simultaneously cooling portions of the cast iron with thick walls of the castings of a thickness that the initial cooling rate is 1°-4° C/sec to form gray cast iron in the thick-walled portions.
References Cited (Backward Citations)
US3726670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |