US3869037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrous alloy and abrasive resistant articles made therefrom
Assignee: Teledyne Mid America Corp
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Filing: 1973-03-12
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Granted: 1975-03-04
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Expires: 1993-03-12
Abstract
Abstract A very high carbon, high vanadium alloy steel is prepared in which there is a specific relationship between carbon and vanadium, said steel containing chromium and molybdenum levels, together with balanced carbon and vanadium contents, so as to render said steel forgeable. Forged articles made from said steel after heat treatment to a hardness of 59 to 67 Rockwell C are highly resistant to abrasion and are suitable for a wide variety of uses where a wear resistant steel is required and conventional manufacturing techniques are employed.
Inventors
- 👤 Richard J Henry
- 👤 Robert A Cary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:40
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
9 words
A FERROUS ALLOY STEEL HAVING THE FOLLOWING CHEMICAL ANALYSIS:
Claim 2
Dependent Claim
9 words
A FERROUS ALLOY STEEL HAVING THE FOLLOWING CHEMICAL ANALYSIS:
Claim 3
Dependent Claim
25 words
A ferrous alloy steel as claimed in claim 1 in which the ratio of chromium to molybdenum is within the range of 1.35 to 1.85.
Claim 4
Dependent Claim
14 words
A ferrous alloy steel as claimed in claim 1 having the following chemical analysis:
Claim 5
Dependent Claim
25 words
A ferrous alloy steel as claimed in claim 3 in which the ratio of chromium to molybdenum is within the range of 1.35 to 1.45.
Claim 6
Dependent Claim
18 words
A ferrous alloy steel as claimed in claim 1 having the following approximate chemical analysis in weight percentage:
Claim 7
Dependent Claim
18 words
A ferrous alloy steel as claimed in claim 1 having the following approximate chemical analysis in weight percentage.
Claim 8
Dependent Claim
48 words
AN ABRASION RESISTANT ARTICLE FORMED BY FORGING, AUSTENITIZING, QUENCHING AND TEMPERING A FERROUS ALLOY STEEL HAVING A COMPOSITION AS CLAIMED IN CLAIM 1, SAID ARTICLE HAVING A SUBSTANTIALLY MARTENSITIC STRUCTURE, A ROCKWELL "C" HARDNESS WITHIN THE RANGE OF 59 TO 67 AND A GRINDABILITY INDEX NOT EXCEEDING APPROXIMATELY.3.
Claim 9
Dependent Claim
49 words
An abrasion resistant article formed by forging, austenitizing, quenching and tempering a ferrous alloy steel having a composition as claimed in claim 2, said article having a substantially martensitic structure, a Rockwell C hardness within the range of 59 to 67 and a grindability index not exceeding approximately 0.3.
Claim 10
Dependent Claim
49 words
An abrasion resistant article formed by forging, austenitizing, quenching and tempering a ferrous alloy steel having a composition as claimed in claim 3, said article having a substantially martensitic structure, a Rockwell C hardness within the range of 59 to 67 and a grindability index not exceeding approximately 0.3.
Claim 11
Dependent Claim
49 words
An abrasion resistant article formed by forging, austenitizing, quenching and tempering a ferrous alloy steel having a composition as claimed in claim 4, said article having a substantially martensitic structure, a Rockwell C hardness within the range of 59 to 67 and a grindability index not exceeding approximately 0.3.
Claim 12
Dependent Claim
49 words
An abrasion resistant article formed by forging, austenitizing, quenching and tempering a ferrous alloy steel having a composition as claimed in claim 5, said article having a substantially martensitic structure, a Rockwell C hardness within the range of 59 to 67 and a grindability index not exceeding approximately 0.3.
Claim 13
Dependent Claim
49 words
An abrasion resistant article formed by forging, austenitizing, quenching and tempering a ferrous alloy steel haaving a composition as claimed in claim 6, said article having a substantially martensitic structure, a Rockwell C hardness within the range of 59 to 67 and a grindability index not exceeding approximately 0.3.
References Cited (Backward Citations)
US1982421A
Cited
US2644747A
Cited
US2575219A
Cited
US2662010A
Cited
US2949356A
Cited
US3692515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |