US3929524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat treating linear long-length steel articles, apparatus for effecting said method and articles produced thereby
Assignee: Individual
•
Filing: 1973-07-26
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Granted: 1975-12-30
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Expires: 1993-07-26
Abstract
Abstract During heat treatment a steel stock being treated is continually transferred in succession from one technological operation to another with a speed of 10-300 m/min, and temper-heating is performed to a temperature of 300*-700*C at a rate of 50*3000*C/s. In an apparatus for effecting said method arranged intermediate of a last current lead of an austenitizing-temperature heating zone, as viewed in the direction of the stock travel, and a first current lead of a temper-heating zone is a ferromagnetic core made as one or several packs composed of steel plates. Peculiar to an article resulting from the above heat-treating procedures are high physical, mechanical and rheological characteristics.
Inventors
- 👤 Nikolai Grigorievich Filatov
- 👤 Jury Yakovlevich Meshkov
- 👤 Nikolai Fedorovich Chernenko
- 👤 Dmitry Iosifovich Nikonenko
- 👤 Felix Isaakovich Mashlenko
- 👤 Albert Mikhailovich Belyaev
- 👤 Artur Khadyevich Valeev
- 👤 Valentina Alexandrovna Savina
- 👤 Vladimir Zakharovich Marchenko
- 👤 Valery Ionovich Fedorov
- 👤 Vitaly Nikiforovich Gridnev
- 👤 Konstantin Vasilievi Mikhailov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:00
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/62
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
A METHOD OF HEAT-TREATING LINEAR, LONG-LENGTH STEEL ARTICLES COMPRISING: ELECTRICAL RESISTANCE HEATING STEEL STOCK TO AN AUSTENITIZING TEMPERATURE, COOLING THE SAID STEEL STOCK TOEFFECT MARTENITIZING HARDENING AND SUBSEQUENTLY ELECTRICAL RESISTANCE TEMPER-HEATING SAID STOCK TO A TEMPERATURE OF 300* TO 7000*C AT A RATE OF 50* TO 3000:C SECOND, SAID HEAT TREATMENT BEING CONDUCTED WHILE CONTINUALLY TRANSFERRING SAID STOCK FROM ONE HEAT TREATING OPERATION TOANOTHER AT ASPEEDOF10-300 M MINUTE; SAID METHODBEING FIRTHER CHARACTERIZED IN THAT SAID STEEL STOCK IS ELECTRICALLY ISOLATED BETWEEN THE AUSTENITIZING AND TEMPER-HEATING ZONES BY PASSING SAIS STEEL STOCK THROUGH AT LEAST ONE FERROMAGNETIC CORE MEANS LOCATED BETWEEN THE LEAST CURRENT LEAD OF THE AUSTENITIZING ZONE AND THE FIRST CURRENT LEAD OF THE TEMPER-HEATING ZONE.
Claim 2
Independent Claim
117 words
A METHOD OF HEAT-TREATING LINEAR, LONG-LENGTH STEEL ARTICLES COMPRISING: ELECTRICAL RESISTANCE HEATING STEEL STOCK TO AN AUSTENITIZING TEMPERATURE, COOLING THE SAID STEEL STOCK TOEFFECT MARTENITIZING HARDENING AND SUBSEQUENTLY ELECTRICAL RESISTANCE TEMPER-HEATING SAID STOCK TO A TEMPERATURE OF 300* TO 7000*C AT A RATE OF 50* TO 3000:C SECOND, SAID HEAT TREATMENT BEING CONDUCTED WHILE CONTINUALLY TRANSFERRING SAID STOCK FROM ONE HEAT TREATING OPERATION TOANOTHER AT ASPEEDOF10-300 M MINUTE; SAID METHODBEING FIRTHER CHARACTERIZED IN THAT SAID STEEL STOCK IS ELECTRICALLY ISOLATED BETWEEN THE AUSTENITIZING AND TEMPER-HEATING ZONES BY PASSING SAIS STEEL STOCK THROUGH AT LEAST ONE FERROMAGNETIC CORE MEANS LOCATED BETWEEN THE LEAST CURRENT LEAD OF THE AUSTENITIZING ZONE AND THE FIRST CURRENT LEAD OF THE TEMPER-HEATING ZONE.
Claim 3
Dependent Claim
11 words
The method of claim 1, wherein the stock comprises steel strip.
Claim 4
Dependent Claim
11 words
The method of claim 1, wherein the stock comprises steel wire.
References Cited (Backward Citations)
US2059054A
Cited
US2224998A
Cited
US2932502A
Cited
US3469829A
Cited
US3795550A
Cited
US3761323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |