US3959999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing long-length articles from hot-rolled carbon steel and article produced thereby
Assignee: Individual
•
Filing: 1974-11-01
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Granted: 1976-06-01
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Expires: 1994-11-01
Abstract
Abstract A method of producing long length articles from hot-rolled carbon steel is disclosed. A distinctive feature of the method, is that the operations of cold and warm plastic deformation of a wire rod alternate in succession at least twice.
Inventors
- 👤 Nikolai Grigorievich Filatov
- 👤 Vitaly Nikiforovich Gridnev
- 👤 Valentin Gennadievich Gavriljuk
- 👤 Jury Yakovlevich Meshkov
- 👤 Felix Isaakovich Mashlenko
- 👤 Konstantin Vasilievich Mikhailov
- 👤 Valery Ionovich Fedorov
- 👤 Vladimir Zakharovich Marchenko
- 👤 Ivan Konstantinovich Lyskov
- 👤 Viktor Alexandrovich Budilovsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:52
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/0221; C21D8/0231; C21D8/06; C21D8/0226; C21D8/0278; Y; Y10; Y10S; Y10S72/00; Y10S72/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
A method of producing long-length articles from hot-rolled carbon steel, consisting essentially of the steps of: a. descaling a wire rod of hot-rolled carbon steel; b. applying a sublubricant coating to said descaled rod; c. cold plastic deforming said rod within a range from a minimum effective amount to not more than 40-50% deformation whereby said deformation produces microstresses in said rod but is insufficient to cause microcracks in the surface of said rod; d. warm plastic deforming said rod from (c) with concurrent heating of said rod to a temperature within the range 300°-600°C; and e. repeating steps (c) and (d) at least once.
Claim 2
Independent Claim
105 words
A method of producing long-length articles from hot-rolled carbon steel, consisting essentially of the steps of: a. descaling a wire rod of hot-rolled carbon steel; b. applying a sublubricant coating to said descaled rod; c. cold plastic deforming said rod within a range from a minimum effective amount to not more than 40-50% deformation whereby said deformation produces microstresses in said rod but is insufficient to cause microcracks in the surface of said rod; d. warm plastic deforming said rod from (c) with concurrent heating of said rod to a temperature within the range 300°-600°C; and e. repeating steps (c) and (d) at least once.
Claim 3
Dependent Claim
16 words
The method of claim 3 wherein said steps (c) and (d) are repeated at least twice.
Claim 4
Dependent Claim
21 words
The method of claim 1, wherein the amount of plastic deformation of the wire rod with concurrent heating ranges within 5-25%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |