US3916052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating of carbon-containing substrates with titanium carbide
Assignee: Airco Inc
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Filing: 1973-05-16
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Granted: 1975-10-28
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Expires: 1993-05-16
Abstract
Abstract A method for providing a titanium carbide coating on a carboncontaining substrate. Titanium is electron beam evaporated in a vacuum-pumped enclosed chamber, to form an evaporant stream. The stream is deposited, at least partially as titanium, onto a carbon-containing substrate, such as a tungsten carbide tool bit. The substrate is thereafter heat treated to diffuse carbon, which is derived at least partially from the substrate, into the coating to form titanium carbide.
Inventors
- 👤 Walter J Shattes
- 👤 William G Marancik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:44
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/28; C23C14/30; C23C14/06; C23C14/0635; C23C14/14; C23C14/58; C23C14/5806; C23C14/5893; C23C30/00; C23C30/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A METHOD OF PROVIDING A METAL CARBIDE ARMOR COATING ON A SUBSTRATE COMPRISING TUNGSTEN CARBIDE, COMPRISING THE STEPS OF: ELECTRON BEAM EVAPORATING METALLIC TITANIUM IN A VACUUMPUMPED ENCLOSED CHAMBER TO FORM AN EVAPORAN STREAM OF METALLIC TITANIUM, DEPOSITING SAID EVAPRANT STREAM ON TO SAID SUBSTRATE TO FORM A COATING OF THE EVAPORATED METAL THEREON, AND THEREAFTER HEAT TREATING THE SUBSTRATE WITH THE DEPOSITED METALLIC TITANIUM COATING AT A TEMPERATURE OF FROM ABOUT 1100* TO 1400*C, TO DIFFUSE CARBON FROM SAID SUBSTRATE INTO THE SAID COATING, TO TRANSFORM SAID COATING TO TITANIUM CARBIDE.
Claim 2
Independent Claim
92 words
A METHOD OF PROVIDING A METAL CARBIDE ARMOR COATING ON A SUBSTRATE COMPRISING TUNGSTEN CARBIDE, COMPRISING THE STEPS OF: ELECTRON BEAM EVAPORATING METALLIC TITANIUM IN A VACUUMPUMPED ENCLOSED CHAMBER TO FORM AN EVAPORAN STREAM OF METALLIC TITANIUM, DEPOSITING SAID EVAPRANT STREAM ON TO SAID SUBSTRATE TO FORM A COATING OF THE EVAPORATED METAL THEREON, AND THEREAFTER HEAT TREATING THE SUBSTRATE WITH THE DEPOSITED METALLIC TITANIUM COATING AT A TEMPERATURE OF FROM ABOUT 1100* TO 1400*C, TO DIFFUSE CARBON FROM SAID SUBSTRATE INTO THE SAID COATING, TO TRANSFORM SAID COATING TO TITANIUM CARBIDE.
Claim 3
Dependent Claim
18 words
A method in accordance with claim 1, wherein the thickness of said deposited coating is about 5 microns.
Claim 4
Dependent Claim
23 words
A method in accordance with claim 1, wherein said heat treatment is conducted in the temperature range of from about 1150* to 1400*C.
Claim 5
Dependent Claim
28 words
A method in accordance with claim 3 wherein said heat treatment is continued until substantially all of the metal of the deposited coating is converted to metal carbide.
Claim 6
Dependent Claim
27 words
A method in accordance with claim 1 wherein said substrate is maintained at a temperature of between 400*C and 1000*C during deposition of the evaporated metal thereon.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |