US4007073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing articles having alternating magnetic and non-magnetic portions from continuous metal blanks
Assignee: Individual
•
Filing: 1975-08-04
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Granted: 1977-02-08
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Expires: 1995-08-04
Abstract
Abstract A method of producing articles having alternating magnetic and non-magnetic portions from a continuous metal blank includes plastic deformation of the blank portions which are to have magnetic properties imparted thereto. The blank for the articles is manufactured from a metal having an unstable austenitic structure.
Inventors
- 👤 Felix Lvovich Levin
- 👤 Sergei Alexandrovich Golovanenko
- 👤 Vladimir Alexandrovich Dmitriev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:29
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/10; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/0302; H01F1/0306; Y; Y10; Y10S; Y10S148/00; Y10S148/902
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
A method of producing an integral metal article having both magnetic and non-magnetic portions comprising the steps of: selecting a metal article made of an alloy having an unstable austenitic structure and consisting essentially of, by weight, 0.03-0.3% carbon, 12-17% chromium, 30-55% cobalt, up to 7% molybdenum and the balance being iron; and plastically deforming portions of the article intended to form a magnetic structure at a temperature of from 0° to 800° C until the portions acquire the magnetic structure.
Claim 2
Independent Claim
81 words
A method of producing an integral metal article having both magnetic and non-magnetic portions comprising the steps of: selecting a metal article made of an alloy having an unstable austenitic structure and consisting essentially of, by weight, 0.03-0.3% carbon, 12-17% chromium, 30-55% cobalt, up to 7% molybdenum and the balance being iron; and plastically deforming portions of the article intended to form a magnetic structure at a temperature of from 0° to 800° C until the portions acquire the magnetic structure.
Claim 3
Dependent Claim
42 words
The method as claimed in claim 1, further comprising the step of: heating the portions having the magnetic structure after the plastic deformation step to a temperature of from 450° to 850° C for a period of from 0.5 to 200 hours.
Claim 4
Dependent Claim
49 words
The method as claimed in claim 1, further comprising, prior to the plastic deformation step, the steps of: plastically deforming the entire metal article at a temperature of from 800° to 1180° C; and then heating the plastically deformed article to a temperature of from 1050° to 1150° C.
Claim 5
Dependent Claim
38 words
The method as claimed in claim 1, wherein the metal article is made of an alloy consisting essentially of, by weight, 0.03% carbon, 13.4% chromium, 37.3% cobalt, 0.37% manganese, 0.20% silicon, 0.39% vanadium and the balance being iron.
Claim 6
Dependent Claim
36 words
The method as claimed in claim 1, wherein the metal article is made of an alloy consisting essentially of, by weight, 0.2% carbon, 13.6% chromium, 37.5% cobalt, 0.38% manganese, 0.28% silicon and the balance being iron.
Claim 7
Dependent Claim
36 words
The method as claimed in claim 1, wherein the metal article is made of an alloy consisting essentially of, by weight, 0.21% carbon, 12.45% chromium, 38.00% cobalt, 0.26% manganese, 0.1% silicon and the balance being iron.
Claim 8
Dependent Claim
38 words
The method as claimed in claim 1, wherein the metal article is made of an alloy consisting essentialy of, by weight, 0.03% carbon, 12.7% chromium, 33.1% cobalt, 6.2% molybdenum, 0.36% manganese, 0.12% silicon and the balance being iron.
Claim 9
Independent Claim
98 words
A method of producing an integral metal article having both magnetic and non-magnetic portions comprising the steps of: selecting a metal article made of an alloy having an unstable austenitic structure and consisting essentially of, by weight, 0.03-0.3% carbon, 12-17% chromium, 30-55% cobalt, up to 7% molybdenum and the balance being iron; plastically deforming the metal article at a temperature of from 0° to 800° C to form a magnetic structure throughout the entire metal article; and heating portions of the metal article intended to form a non-magnetic structure to a temperature of from 1000° to 1350° C.
Claim 10
Independent Claim
98 words
A method of producing an integral metal article having both magnetic and non-magnetic portions comprising the steps of: selecting a metal article made of an alloy having an unstable austenitic structure and consisting essentially of, by weight, 0.03-0.3% carbon, 12-17% chromium, 30-55% cobalt, up to 7% molybdenum and the balance being iron; plastically deforming the metal article at a temperature of from 0° to 800° C to form a magnetic structure throughout the entire metal article; and heating portions of the metal article intended to form a non-magnetic structure to a temperature of from 1000° to 1350° C.
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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |