Patent US4096076A successfully refreshed from Google Patents.
US4096076A
Expired / Lapsed
US
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Forging compound
Assignee: Ex-Cell-O Corp
•
Filing: 1976-01-29
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Granted: 1978-06-20
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Expires: 1996-01-29
Abstract
Abstract A forging compound particularly adapted for hot die dwell forging of titanium and its alloys comprises boundary layer particles (boron nitride or graphite) and a major quantity (more than 60% by weight) of vitreous components. The vitreous components comprise diboron trioxide and silica frit containing a metal oxide wetting agent. In a preferred form, the forging lubricant comprises about 14 to 25% by weight boron nitride particles, balance, vitreous components. The latter comprise about 60% to 75% by weight diboron trioxide, balance silica glass containing cobalt oxide wetting agent in an amount of 1.0 to 3% by weight of the vitreous components. All the foregoing ingredients may be dispersed in a coatable carrier preferably comprising a solvent, e.g., xylene, in which a resin binder is dissolved. A method of using the lubricant includes coating workpieces with the lubricant, heating the workpieces to forging temperature, and imposing forging pressure on the workpiece within an enclosed die for a dwell period to creep-flow the workpiece metal into conformity with the forging die.
Inventors
- 👤 William D. Spiegelberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:13
CPC Classifications
C; C10; C10M; C10M103/00; C10M111/00; C10M111/04; C10M2201/00; C10M2201/02; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/06; C10M2201/061; C10M2201/062; C10M2201/063; C10M2201/087; C10M2201/12; C10M2201/16; C10M2201/18; C10M2207/00; C10M2207/04; C10M2207/042; C10M2207/28; C10M2207/32; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/101; C10M2209/102; C10M2209/12; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247; C10N2050/00; C10N2050/015; C10N2050/02; C10N2050/04; Y; Y10; Y10S; Y10S72/00; Y10S72/70
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
183 words
A forging compound for at least partially coating workpieces of titanium and its alloys prior to hot die forging of the workpiece, said forging compound comprising a mixture of boundary layer particles and a powder of vitreous components, said boundary layer particles remaining solid at forging temperatures and being selected from boron nitride, graphite and mixtures thereof, said boundary layer particles being less than 40% and more than 7% by weight of the total vitreous and boundary layer components of the forging compound, said powder of vitreous components being substantially free of materials which have a tendency to corrosively attack the forging dies and comprising diboron trioxide in an amount between about 60 to 75% by weight of the vitreous components and silica glass to provide a desired viscosity during forging, the balance of the vitreous components comprising a metal oxide wetting agent to promote spreading of the vitreous components over the surface of the workpiece during forging, the metal oxide wetting agent being between about one-half of 1 to 5% by weight of the vitreous components and being an oxide of cobalt.
Claim 2
Dependent Claim
183 words
A forging compound for at least partially coating workpieces of titanium and its alloys prior to hot die forging of the workpiece, said forging compound comprising a mixture of boundary layer particles and a powder of vitreous components, said boundary layer particles remaining solid at forging temperatures and being selected from boron nitride, graphite and mixtures thereof, said boundary layer particles being less than 40% and more than 7% by weight of the total vitreous and boundary layer components of the forging compound, said powder of vitreous components being substantially free of materials which have a tendency to corrosively attack the forging dies and comprising diboron trioxide in an amount between about 60 to 75% by weight of the vitreous components and silica glass to provide a desired viscosity during forging, the balance of the vitreous components comprising a metal oxide wetting agent to promote spreading of the vitreous components over the surface of the workpiece during forging, the metal oxide wetting agent being between about one-half of 1 to 5% by weight of the vitreous components and being an oxide of cobalt.
Claim 3
Dependent Claim
21 words
The compound of claim 1 wherein the boundary layer particles are boron nitride particles and the metal oxide is cobalt oxide.
Claim 4
Dependent Claim
75 words
The compound of claim 1 wherein the boundary layer particles are of a size that at least 95% thereof pass through a 325 mesh screen and comprise between about 7 to 25% by weight of the total of boundary layer particles and vitreous components, the diboron trioxide comprises between about 67 to 75% by weight of the vitreous components, and the metal oxide comprises between about 1 to 3% by weight of the vitreous components.
Claim 5
Dependent Claim
20 words
The compound of claim 3 wherein the boundary layer particles are boron nitride and the metal oxide is cobalt oxide.
Claim 6
Dependent Claim
47 words
The compound of claim 4 having the following composition: ______________________________________
% By Weight Component
______________________________________
25 Boron nitride
75 Vitreous components
______________________________________ with the vitreous components comprising ______________________________________
% By Weight
of Vitreous Components
Component
______________________________________
67 Diboron trioxide
31 Silica glass frit
2 Cobalt oxide
______________________________________
Claim 7
Dependent Claim
46 words
The compound of claim 4 having the following composition: ______________________________________
% By Weight Component
______________________________________
14 Boron nitride
86 Vitreous components
______________________________________ with the vitreous components comprising ______________________________________
% By Weight
of Vitreous Components
Component
67 Diboron trioxide
31 Silica glass frit
2 Cobalt oxide
______________________________________
Claim 8
Dependent Claim
31 words
The compound of claim 1 wherein the diboron trioxide, silica glass frit, and metal oxide have been reacted in advance of use to form a borosilicate glass containing the metal oxide.
Claim 9
Dependent Claim
35 words
A forging compound as set forth in claim 1 wherein said boundary layer particles are of a size less than that at which at least 95% of the particles pass through a 40 mesh screen.
Claim 10
Dependent Claim
33 words
A forging compound as set forth in claim 1 wherein said vitreous components are substantially free of oxides of lithium, sodium, potassium, vanadium and phosphorus all of which tend to corrode forging dies.
Claim 11
Dependent Claim
33 words
A forging compound as set forth in claim 1 wherein said vitreous components are substantially free of oxides of calcium, magnesium, lead and cerium to retard crystallization of the forging compound during preheating.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |