Patent US4276085A successfully refreshed from Google Patents.
US4276085A
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High speed steel
Assignee: Kloster Speedsteel AB
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Filing: 1980-01-14
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Granted: 1981-06-30
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Expires: 2000-01-14
Abstract
Abstract There is disclosed a tool steel having a very high wear resistance for cutting purposes which consists essentially of 0.8-1.2 wt. % C, 3.0-6.0 wt. % Cr, up to 40 wt. % W, up to 20 wt. % Mo where W+2Mo=20.0-40 wt. %, up to 15 wt. % Co, not more than about 0.1 wt. % V, balance Fe and normal impurities.
Inventors
- 👤 Henry L. Wisell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:54
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/22; C22C38/12; C22C38/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
54 words
Tool steel having a very high wear resistance for cutting purposes characterized in that it consists essentially of: C 0.8-1.2 wt% Cr 3.0-6.0 wt% W up to 40 wt% Mo up to 20 wt% where W+2Mo=20.0-40 wt% Co up to 15 wt% V not more than about 0.1 wt% Balance Fe and normal impurities.
Claim 2
Dependent Claim
54 words
Tool steel having a very high wear resistance for cutting purposes characterized in that it consists essentially of: C 0.8-1.2 wt% Cr 3.0-6.0 wt% W up to 40 wt% Mo up to 20 wt% where W+2Mo=20.0-40 wt% Co up to 15 wt% V not more than about 0.1 wt% Balance Fe and normal impurities.
Claim 3
Dependent Claim
49 words
Tool steel according to claim 1, characterized in that the content of W is max about 35 wt-%, the content of Mo max about 17.5 wt-%, the total amount of W+2Mo being max about 35 wt-%, and that the content of C lies within the range of 0.8-1.1 wt-%.
Claim 4
Dependent Claim
24 words
Tool steel according to claim 1, characterized in that the amounts of C and W+2Mo lies within the area C-D-E-F-C in the accompanying diagram.
Claim 5
Dependent Claim
24 words
Tool steel according to claim 1, characterized in that the amounts of C and W+2Mo lies within the area C-D'-E'-E-F'-C'-C in the accompanying diagram.
Claim 6
Dependent Claim
24 words
Tool steel according to claim 1, characterized in that the amounts of C and W+2Mo lie within the area C"-D"-E"-F"-C" in the accompanying diagrams.
References Cited (Backward Citations)
US2147122A
Cited
US1998956A
Cited
US1998957A
Cited
US1998953A
Cited
US3012879A
Cited
US3850621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |