US3935004A
Expired / Lapsed
US
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Addition of alloying constituents to aluminum
Assignee: Diamond Shamrock Corp
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Filing: 1974-11-11
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Granted: 1976-01-27
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Expires: 1994-11-11
Abstract
Abstract Metals are alloyed into aluminum using a solid compact comprised of particles containing a high concentration of the metal to be added. The compacts are prepared by blending finely divided particles of the metal containing material with a salt fluxing agent, then compacting the mixture into a readily useable form such as a pellet. The resultant pellet provides rapid dissolution of the alloying constituent in the aluminum whether cold charged to the furnace or added to a molten bath over a wide range of bath temperatures.
Inventors
- 👤 John Porter Faunce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:51
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
87 words
A compacted alloying addition for alloying metals to aluminum, which consists essentially of from about 97.5 to about 99.9 percent by weight of at least one particulate metal alloying material selected from the group consisting of manganese, chromium, and iron, substantially all of said metal having a particle size less than about 0.25 mm., and about 0.1 to 2.5 percent by weight of non-hygroscopic salt fluxing agent selected from the group consisting of KBF 4 and K 5 Na 3 Ba 2 (SiF 6 ) 6 .
Claim 2
Dependent Claim
87 words
A compacted alloying addition for alloying metals to aluminum, which consists essentially of from about 97.5 to about 99.9 percent by weight of at least one particulate metal alloying material selected from the group consisting of manganese, chromium, and iron, substantially all of said metal having a particle size less than about 0.25 mm., and about 0.1 to 2.5 percent by weight of non-hygroscopic salt fluxing agent selected from the group consisting of KBF 4 and K 5 Na 3 Ba 2 (SiF 6 ) 6 .
Claim 3
Dependent Claim
38 words
An additive according to claim 1 wherein substantially all of the metal alloying material has a particle size less than 0.15 mm. and contains at least about 30 percent material having a particle size less than 0.05 mm.
Claim 4
Dependent Claim
24 words
An additive according to claim 1 wherein the salt fluxing agent is inactive as a flux at temperatures below the liquidus temperature of aluminum.
Claim 5
Dependent Claim
17 words
An additive according to claim 1 wherein the salt fluxing agent has a melting point below 788°C.
Claim 6
Dependent Claim
23 words
An additive according to claim 1 wherein the amount of salt fluxing agent ranges from about 0.1 to about 1.5 percent by weight.
Claim 7
Dependent Claim
27 words
An additive according to claim 1 wherein a binder material is additionally present in an amount sufficient to obtain a coherent body upon compacting of the composition.
Claim 8
Dependent Claim
13 words
An additive according to claim 6 wherein the binder material is sodium silicate.
Claim 9
Dependent Claim
27 words
An additive according to claim 1 wherein the manganese alloying material is selected from the group consisting of high purity manganese, ferro-manganese, electrolytic manganese, and impure manganese.
Claim 10
Dependent Claim
25 words
An additive according to claim 1 wherein the chromium alloying material is selected from the group consisting of chromium, ferro-chromium, impure chromium, and electrolytic chromium.
Claim 11
Dependent Claim
32 words
An additive according to claim 1 wherein the iron alloying material is selected from the group consisting of electrolytic iron, impure iron, and alloys containing more than 50 percent iron by weight.
Claim 12
Dependent Claim
47 words
An additive according to claim 1 which contains manganese alloying material substantially all having a particle size less than 0.15 mm., from 0.1 to 1.5 percent by weight of KBF 4 , and a binder material in an amount sufficient to obtain a coherent body upon compacting.
Claim 13
Dependent Claim
99 words
A process for the addition of metal alloying constituents to aluminum, which comprises; blending a mixture of at least one particulate metal alloying material selected from manganese, chromium, and iron, substantially all of said metal having a particle size less than about 0.25 mm., with from about 0.1 to about 2.5 percent by weight of a non-hygroscopic salt fluxing agent selected from the group consisting of KBF 4 and K 5 Na 3 Ba 2 (SiF 6 ) 6 ; compacting the blended mixture into a coherent body; and admixing the compacted mixture with the aluminum to be alloyed.
Claim 14
Dependent Claim
99 words
A process for the addition of metal alloying constituents to aluminum, which comprises; blending a mixture of at least one particulate metal alloying material selected from manganese, chromium, and iron, substantially all of said metal having a particle size less than about 0.25 mm., with from about 0.1 to about 2.5 percent by weight of a non-hygroscopic salt fluxing agent selected from the group consisting of KBF 4 and K 5 Na 3 Ba 2 (SiF 6 ) 6 ; compacting the blended mixture into a coherent body; and admixing the compacted mixture with the aluminum to be alloyed.
Claim 15
Dependent Claim
43 words
The process of claim 12 wherein the compacted mixture is admixed by charging into an essentially empty furnace together with the aluminum prior to melt-down of the charge, and the further step of heating the aluminum above its liquidus temperature is carried out.
Claim 16
Dependent Claim
14 words
The process of claim 12 wherein the compacted mixture is admixed with molten aluminum.
Claim 17
Dependent Claim
37 words
The process of claim 12 wherein substantially all of the metal alloying material has a particle size less than 0.15 mm. and contains at least about 30 percent material having a particle size less than 0.05 mm.
Claim 18
Dependent Claim
31 words
The process of claim 12 wherein a binder material is additionally incorporated into the blended mixture prior to compacting, and the compacted mixture is dried prior to admixing with the aluminum.
Claim 19
Dependent Claim
23 words
The process of claim 12 wherein the salt fluxing agent is inactive as a flux at temperatures below the liquidus temperature of aluminum.
Claim 20
Dependent Claim
22 words
The process of claim 12 wherein the amount of salt fluxing agent ranges from about 0.1 to about 1.5 percent by weight.
Claim 21
Dependent Claim
56 words
The process of claim 12 wherein the mixture contains manganese metal alloying material substantially all having a particle size less than 0.15 mm., from 0.1 to 1.5 percent by weight of KBF 4 , and a binder material is additionally present in an amount sufficient to obtain a coherent body upon compacting of the blended mixture.
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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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |