US4053306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tungsten carbide-steel alloy
Assignee: Reed Tool Co
•
Filing: 1976-02-27
•
Granted: 1977-10-11
•
Expires: 1996-02-27
Abstract
Abstract A wear resistant hard metal composition or alloy, comprises 1 - 20 micron particles of tungsten carbide or tungsten carbide and up to about ten percent cobalt or nickel embedded uniformly throughout a steel matrix of high tungsten content. The method of making the alloy composition comprises depositing tungsten carbide particles of less than 325 mesh into a fused steel matrix.
Inventors
- 👤 Ralph V. Rodriguez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:35
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06; C22C29/067
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
91 words
A hard metal composition comprising 1-20 micron particles of tungsten carbide uniformly dispersed in a high tungsten alloy steel matrix and having a uniform surface hardness in excess of Rockwell C 55, obtained by addition of pressed unsintred granules of tungsten carbide particles less than 325 mesh in size to molten steel in a ratio of 50-250 parts by weight of tungsten carbide to 100 parts by weight of steel, the high tungsten alloy steel matrix being produced by in situ decomposition of the tungsten carbide added to the molten steel.
Claim 2
Dependent Claim
91 words
A hard metal composition comprising 1-20 micron particles of tungsten carbide uniformly dispersed in a high tungsten alloy steel matrix and having a uniform surface hardness in excess of Rockwell C 55, obtained by addition of pressed unsintred granules of tungsten carbide particles less than 325 mesh in size to molten steel in a ratio of 50-250 parts by weight of tungsten carbide to 100 parts by weight of steel, the high tungsten alloy steel matrix being produced by in situ decomposition of the tungsten carbide added to the molten steel.
Claim 3
Dependent Claim
27 words
A hard metal composition in accordance with claim 1 in which the tungsten carbide particles in said granules contain up to ten percent (10%) cobalt or nickel.
References Cited (Backward Citations)
US3942954A
Cited
US3929471A
Cited
US3819364A
Cited
US3823030A
Cited
US3917463A
Cited
US3916497A
Cited
DE2426414A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |