Patent US4108644A successfully refreshed from Google Patents.
US4108644A
Expired / Lapsed
US
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Manufacture of reactive metals and alloys
Assignee: Viking Metallurgical Corp
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Filing: 1976-11-11
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Granted: 1978-08-22
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Expires: 1996-11-11
Abstract
Abstract Method for manufacturing reactive metal alloys using revert raw materials as a principal raw material source.
Inventors
- 👤 M. Victor Walberg
- 👤 James H. C. Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:10
CPC Classifications
C; C22; C22B; C22B7/00; C22B7/001; C22B7/003; C22C; C22C14/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A method for the manufacture of a reactive metal alloy, comprising collecting revert material of said alloy, a majority of said revert material being machined chips, crushing said revert material, controlling the bulk density of said crushed revert material to above 30 pounds per cubic foot, washing and drying said crushed revert material, melting and casting said revert material into an electrode in an electron beam furnace, analyzing said electrode to determine the chemical composition thereof, compositing said electrode with quantities of prime base metal and alloying agents based upon said analysis, and melting and casting said composited electrode in a consumable electrode vacuum arc furnace.
Claim 2
Independent Claim
106 words
A method for the manufacture of a reactive metal alloy, comprising collecting revert material of said alloy, a majority of said revert material being machined chips, crushing said revert material, controlling the bulk density of said crushed revert material to above 30 pounds per cubic foot, washing and drying said crushed revert material, melting and casting said revert material into an electrode in an electron beam furnace, analyzing said electrode to determine the chemical composition thereof, compositing said electrode with quantities of prime base metal and alloying agents based upon said analysis, and melting and casting said composited electrode in a consumable electrode vacuum arc furnace.
Claim 3
Dependent Claim
31 words
A method in accordance with claim 1 wherein the washing and drying of the crushed revert material is controlled to provide a cleaned revert material containing less than 0.03 w/o hydrocarbon.
Claim 4
Dependent Claim
53 words
A method in accordance with claim 1 wherein said reactive metal is titanium, wherein said electrode is analyzed for aluminum, vanadium, tin, oxygen, nickel, chromium and iron and wherein the amount of prime titanium and alloying agents composited with said electrode is selected to provide an ingot which meets specifications for said alloy.
Claim 5
Dependent Claim
32 words
A method in accordance with claim 3 wherein said reactive metal alloy is selected from titanium, 6 w/o aluminum - 4 w/o vanadium and titanium, 5 w/o aluminum - 21/2 w/o tin.
Claim 6
Independent Claim
89 words
A method for the manufacture of a reactive metal alloy comprising, collecting revert material of said alloy, a majority of said revert material being machined chips, crushing said revert material, controlling the bulk density of said crushed revert material to above 30 pounds per cubic foot, cleaning said revert material, drying said revert material, controlling the average composition of said revert material to below about 0.08 w/o carbon, about 0.05 w/o nitrogen, and about 0.015 w/o hydrogen, and melting and casting said revert material in an electron beam furnace.
Claim 7
Independent Claim
89 words
A method for the manufacture of a reactive metal alloy comprising, collecting revert material of said alloy, a majority of said revert material being machined chips, crushing said revert material, controlling the bulk density of said crushed revert material to above 30 pounds per cubic foot, cleaning said revert material, drying said revert material, controlling the average composition of said revert material to below about 0.08 w/o carbon, about 0.05 w/o nitrogen, and about 0.015 w/o hydrogen, and melting and casting said revert material in an electron beam furnace.
Claim 8
Dependent Claim
42 words
A method in accordance with claim 5 wherein the composition of the revert material is additionally controlled to between about 0.2 w/o and about 0.3 w/o oxygen and wherein aluminum is added to the molten revert material in the electron beam furnace.
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) | 1981-08-21 | 1982-02-20 | 1982-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-21 | 1986-02-20 | 1986-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-21 | 1990-02-20 | 1990-08-22 | $7700.00 | Window Closed / Lapsed |