US3640700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing an ingot of chromium metal or chromium-base alloy
Assignee: Riken Piston Ring Industrial Co Ltd
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Filing: 1970-08-31
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Granted: 1972-02-08
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Expires: 1990-08-31
Abstract
Abstract A process for producing an ingot of chromium metal or chromiumbase alloy having a low content of impurities, such as hydrogen, nitrogen, oxygen, carbon, phosphorus, sulfur, and the like, in which an aqueous solution containing chromium salt is electrolyzed using as the cathode a metal material formed in a predetermined shape, such as circular, elliptical, rectangular or the like in horizontal cross section, to electrodeposit chromium on said metal material. The metal material, if desired, may be removed by chemical dissolution or heat melting after the electrolysis. The thus obtained chromium metal of the predetermined shape may be used as a consumable electrode. Additional materials are filled into the electrodeposited chromium metal which can be either free of the metal material used as the cathode or not free of the same. The chromium metal filled with the additional material is heated to sinter same under a reduced (vacuum) pressure or in a hydrogen atmosphere. A consumable electrode of chromium metal or chromium base alloy is thereby obtained. A high purity chromium metal ingot or chromium base alloy ingot is produced using the thus obtained consumable electrode by consumable-electrode-melting in a water-cooled metal crucible.
Inventors
- 👤 Kenzo Suzuki
- 👤 Seiya Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:54
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/07; C; C22; C22B; C22B4/00; C22C; C22C27/00; C22C27/06; C25; C25C; C25C1/00; C25C1/06; C25C1/10; C25D; C25D1/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
36 words
A process according to claim 1, wherein the metal ingot is a chromium metal ingot, and including the further step of, after the electrolysis and prior to the consumable-electrode-melting, removing the metal material from the composite.
Claim 2
Dependent Claim
55 words
A process according to claim 1, wherein the metal ingot is a chromium metal ingot, and including the further steps of, after the electrolysis and prior to the consumable-electrode-melting, removing the metal material from the composite and heating the electrodeposited chromium metal under a reduced pressure or in a hydrogen atmosphere to degasify the same.
Claim 3
Dependent Claim
17 words
A process according to claim 3, wherein aluminum or aluminum alloy is used as the metal material.
Claim 4
Dependent Claim
38 words
A process according to claim 3, wherein aluminum or aluminum alloy is used as the metal material and the removing of the aluminum or the aluminum alloy is carried out by dissolving the same in an alkaline solution.
Claim 5
Dependent Claim
42 words
A process according to claim 3, wherein aluminum or aluminum alloy is used as the metal material and the removing of the aluminum or the aluminum alloy is carried out by heating the composite to melt said aluminum or the aluminum alloy.
Claim 6
Dependent Claim
30 words
A process according to claim 3, wherein iron is used as the metal material and the removing of the iron is carried out by dissolving the same in an acid.
Claim 7
Dependent Claim
48 words
A process according to claim 3, including the further step of, after the removing of the metal material from the composite and prior to the heating of the electrodeposited chromium metal under a reduced pressure or in a hydrogen atmosphere, filling chromium metal into the electrodeposited chromium metal.
Claim 8
Dependent Claim
17 words
A process according to claim 8, wherein aluminum or aluminum alloy is used as the metal material.
Claim 9
Dependent Claim
46 words
A process according to claim 8, wherein aluminum or aluminum alloy is used as the metal material and the removing of the aluminum or the aluminum alloy is carried out by immersing the composite in an alkaline solution to dissolve the aluminum or the aluminum alloy.
Claim 10
Dependent Claim
42 words
A process according to claim 8, wherein aluminum or aluminum alloy is used as the metal material and the removing of the aluminum or the aluminum alloy is carried out by heating the composite to melt the aluminum or the aluminum alloy.
Claim 11
Dependent Claim
30 words
A process according to claim 8, wherein iron is used as the metal material, and the removing of the iron is carried out by dissolving the same in an acid.
Claim 12
Dependent Claim
62 words
A process according to claim 1, wherein the metal ingot is a chromium-base alloy ingot, and including the further steps of, after the electrolysis and prior to the consumable-electrode-melting, removing the metal material from the composite and filling a member selected from the group consisting of alloying elements and a mixture of alloying elements and chromium metal into the electrodeposited chromium metal.
Claim 13
Dependent Claim
80 words
A process according to claim 1, wherein the metal ingot is a chromium-base alloy ingot, and including the further steps of, after the electrolysis and prior to the consumable-electrode-melting, removing the metal material from the composite, filling a member selected from the group consisting of alloying elements and a mixture of alloying elements and chromium metal into the electrodeposited chromium metal and heating the electrodeposited chromium metal under a reduced pressure or in a hydrogen atmosphere to degasify the same.
Claim 14
Dependent Claim
17 words
A process according to claim 14, wherein aluminum or aluminum alloy is used as the metal material.
Claim 15
Dependent Claim
46 words
A process according to claim 14, wherein aluminum or aluminum alloy is used as the metal material, and the removing of the aluminum or the aluminum alloy is carried out by immersing the composite in an alkaline solution to dissolve the aluminum or the aluminum alloy.
Claim 16
Dependent Claim
42 words
A process according to claim 14, wherein aluminum or aluminum alloy is used as the metal material, and the removing of the aluminum or the aluminum alloy is carried out by heating the composite to melt the aluminum or the aluminum alloy.
Claim 17
Dependent Claim
30 words
A process according to claim 14 wherein iron is used as the metal material, and the removing of the iron is carried out by dissolving the same in an acid.
Claim 18
Dependent Claim
39 words
A process according to claim 1, wherein the metal ingot is a chromium-base alloy ingot, and in which the entire composite is subjected to said consumable-electrode-melting so that the metal material comprises a component of said chromium-base alloy ingot.
Claim 19
Dependent Claim
35 words
A process according to claim 19, including the further step of, after the electrolysis and prior to the consumable-electrode-melting, heating the composite under a reduced pressure or in a hydrogen atmosphere to degasify the same.
Claim 20
Dependent Claim
28 words
A process according to claim 19, including the further step of, after the electrolysis and prior to the consumable-electrode-melting, filling chromium metal and/or alloying elements into the composite.
Claim 21
Dependent Claim
45 words
A process according to claim 19, including the further steps of, after the electrolysis and prior to the consumable-electrode-melting, filling chromium metal and/or alloying elements into the composite and heating the composite under a reduced pressure or in a hydrogen atmosphere to degasify the same.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |