GB1067946A - Method for degassing and refining carbon-containing metal melts - Google Patents
Method for degassing and refining carbon-containing metal meltsInfo
- Publication number
- GB1067946A GB1067946A GB1659065A GB1659065A GB1067946A GB 1067946 A GB1067946 A GB 1067946A GB 1659065 A GB1659065 A GB 1659065A GB 1659065 A GB1659065 A GB 1659065A GB 1067946 A GB1067946 A GB 1067946A
- Authority
- GB
- United Kingdom
- Prior art keywords
- inert gas
- oxygen
- argon
- melt
- degassing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/068—Decarburising
- C21C7/0685—Decarburising of stainless steel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
A carbon-containing metallic melt particularly alloyed steel is degassed and refined by blowing first an inert gas such as argon then a mixture of an inert gas and oxygen against the melt surface, the amount of oxygen being limited to such quantity that only C and elements easier to oxidize than C such as Si and Mn will be oxidized to avoid the loss of other alloying elements such as Cr, Fe, Ni, Co more difficult to oxidize and minimize red iron oxide fume formation. Inert gas is also blown against the components of the melt being melted; subsequently oxygen is added followed by a final blowing again with inert gas only. The refining may be effected by using commercial grade argon containing 2% by volume oxygen, the initial and final degassing with pure argon being effected by leading this argon through layers of iron chips and titanium sponge at 875 DEG C. Oxidation may be made in several steps alternating with degassing blowings. The process may also be applied to the re-melting of scrap while adjusting its composition. In manufacturing alloy steels, e.g. austenitic steels of composition 0.05% C, 15% Cr, 25% Ni, 0.4% Si, 0.3% Mn, 0.3% V, 0.3% Mo, 2% active Ti, balance Fe, Ti may be added to the degassed and refined steel melt at 1650 DEG C. in the form of a Ti-Ni alloy.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE526664 | 1964-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1067946A true GB1067946A (en) | 1967-05-10 |
Family
ID=20266095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1659065A Expired GB1067946A (en) | 1964-04-28 | 1965-04-20 | Method for degassing and refining carbon-containing metal melts |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3307937A (en) |
| BE (1) | BE663106A (en) |
| GB (1) | GB1067946A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1281465B (en) * | 1965-03-19 | 1969-05-29 | Nyby Bruk Ab | Process for removing unwanted accompanying elements from metals and alloys |
| US3498783A (en) * | 1967-05-04 | 1970-03-03 | Stora Kopparbergs Bergslags Ab | Method of refining a carbonaceous metal |
| US3850617A (en) * | 1970-04-14 | 1974-11-26 | J Umowski | Refining of stainless steel |
| JPS5896812A (en) * | 1981-12-02 | 1983-06-09 | Nippon Steel Corp | Refining method by decarburization |
| US4514220A (en) * | 1984-04-26 | 1985-04-30 | Allegheny Ludlum Steel Corporation | Method for producing steel in a top-blown vessel |
| US4615730A (en) * | 1985-04-30 | 1986-10-07 | Allegheny Ludlum Steel Corporation | Method for refining molten metal bath to control nitrogen |
| KR0179394B1 (en) * | 1994-06-06 | 1999-02-18 | 도자끼 시노부 | Decarburization refining of chromium containing molten steel |
| US5897684A (en) * | 1997-04-17 | 1999-04-27 | Ltv Steel Company, Inc. | Basic oxygen process with iron oxide pellet addition |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2826489A (en) * | 1953-12-18 | 1958-03-11 | Nyby Bruk Ab | Method for the manufacture of gas-pure metals and alloys |
| US2803534A (en) * | 1954-08-07 | 1957-08-20 | Oesterr Alpine Montan | Process for the production of steel |
| US3003865A (en) * | 1959-09-10 | 1961-10-10 | Cameron Iron Works Inc | Decarburizing process for alloy steels containing chromium |
| BE610265A (en) * | 1960-11-18 |
-
1965
- 1965-04-12 US US44756765 patent/US3307937A/en not_active Expired - Lifetime
- 1965-04-20 GB GB1659065A patent/GB1067946A/en not_active Expired
- 1965-04-27 BE BE663106D patent/BE663106A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1458901A1 (en) | 1969-01-09 |
| DE1458901B2 (en) | 1972-12-28 |
| US3307937A (en) | 1967-03-07 |
| BE663106A (en) | 1965-10-27 |
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