Patent US3801308A successfully refreshed from Google Patents.
US3801308A
Expired / Lapsed
US
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Method for the addition of metals to steel
Assignee: Individual
•
Filing: 1972-09-05
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Granted: 1974-04-02
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Expires: 1992-09-05
Abstract
Abstract A process for incorporating a metal in steel by adding to molten iron or steel an intimate mixture, preferably in compacted form, of an oxide of the metal and carbon. The molten iron or steel is at a sufficiently high temperature to initiate a reaction between the carbon and the metal oxide to form, in situ, a metal carbide that readily disperses throughout the molten iron or steel.
Inventors
- 👤 R Gustison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:51
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
A process according to claim 1 wherein the metal is niobium, vanadium, chromium, zirconium, titanium, manganese, molybdenum or boron.
Claim 2
Dependent Claim
38 words
A process according to claim 1 wherein the temperature of the molten steel is sufficiently high to initiate a reaction between the oxide of the metal and the carbon to form, in situ, a carbide of the metal.
Claim 3
Dependent Claim
35 words
A process according to claim 3 wherein sufficient carbon is included in the mixture to approximate at least the stoichiometric amount required to obtain complete conversion of the metal oxide to its metal carbide form.
Claim 4
Dependent Claim
31 words
A process according to claim 4 wherein final adjustment of the carbon content of the steel is obtained by adding carbon to the mixture in excess of the stoichiometrically required amount.
Claim 5
Dependent Claim
18 words
A process according to claim 1 wherein the material containing an oxide of the metal is -65 mesh.
Claim 6
Dependent Claim
12 words
A process accorDing to claim 1 wherein the carbon is -100 mesh.
Claim 7
Dependent Claim
26 words
A process according to claim 1 wherein between 10 percent and 90 percent by weight of a -35 mesh iron powder is included in the mixture.
Claim 8
Dependent Claim
75 words
A process for the production of high-strength, low-alloy steel which comprises adding to molten iron or steel an intimate mixture of a metal substantially in oxide form oxide selected from the group consisting of niobium oxide, vanadium oxide, chromium oxide, zirconium oxide, titanium oxide, manganese oxide, molybdenum oxide, boron oxide, and ores containing these oxides, and a sufficient quantity of carbon to enable the conversion of the metal from its oxide to its carbide form.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |