GB1002106A - Process for production of ultra clean steel - Google Patents
Process for production of ultra clean steelInfo
- Publication number
- GB1002106A GB1002106A GB32579/62A GB3257962A GB1002106A GB 1002106 A GB1002106 A GB 1002106A GB 32579/62 A GB32579/62 A GB 32579/62A GB 3257962 A GB3257962 A GB 3257962A GB 1002106 A GB1002106 A GB 1002106A
- Authority
- GB
- United Kingdom
- Prior art keywords
- powder
- iron
- microns
- carbon
- iron powder
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/20—Arc remelting
-
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Steel low in inclusions is produced from iron powder containing not more than 0.01% each of sulphur and phosphorus by forming the powder into a consumable electrode, melting in a furnace at a pressure not exceeding 1000 microns, the molten metal being collected in a water-cooled metal crucible, and using the resultant ingot as a consumable electrode in a second melting stage carried out at a pressure not exceeding 100 microns. Sufficient carbon is present in the initial mixture, either as a constituent of the iron or added thereto, to convert all the oxygen present to carbon monoxide and to provide the desired carbon content in the product; altenatively the required carbon content may be obtained by mixing appropriate amounts of powders of differing carbon content. Should the iron powder contain an undesired excess of carbon this may be eliminated by adding a controlled amount of iron oxide to the starting mixture. Alloying additions such as nickel, molybdenum, cobalt, manganese, vanadium, silicon and chromium may be added in powder form to the iron powder, while aluminium and titanium are preferably added by inserting them in holes drilled in the electrode of the second stage melting. Sulphur may be removed from the iron powder by annealing in wet hydrogen (e.g. saturated with water vapour at 150 DEG F.) at 1500-1700 DEG F. for 2-4 hours; this may be followed by annealing in dry hydrogen at 1500-1750 DEG F. for 2-4 hours to partially eliminate oxygen. The electrode may be formed from the initial powder by pressing at 40000-50000 p.s.i. followed by vacuum sintering at 1750 DEG F. under a pressure of 1-500 microns, or by sintering in an inert atmosphere at temperatures up to 2200 DEG F.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US153650A US3235373A (en) | 1961-11-20 | 1961-11-20 | Process for production of ultra clean steel |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1002106A true GB1002106A (en) | 1965-08-25 |
Family
ID=22548120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB32579/62A Expired GB1002106A (en) | 1961-11-20 | 1962-08-24 | Process for production of ultra clean steel |
Country Status (5)
Country | Link |
---|---|
US (1) | US3235373A (en) |
BE (1) | BE623082A (en) |
GB (1) | GB1002106A (en) |
LU (1) | LU42271A1 (en) |
NL (1) | NL282866A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2424327A1 (en) * | 1978-04-24 | 1979-11-23 | Latrobe Steel Co | STEEL FOR BEARINGS |
FR2426738A1 (en) * | 1978-05-24 | 1979-12-21 | Ver Edelstahlwerke Ag | PROCESS FOR THE MANUFACTURING OF CONSUMABLE ELECTRODES OF LARGE DIAMETER FOR THE REFUSION OF METALS |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3341321A (en) * | 1963-10-09 | 1967-09-12 | Skf Ind Inc | Process for treating primarily metallic materials |
US3387967A (en) * | 1965-02-08 | 1968-06-11 | Republic Steel Corp | High purity steels and production thereof |
US3657026A (en) * | 1969-07-28 | 1972-04-18 | Westinghouse Electric Corp | High initial permeability fe-48ni product and process for manufacturing same |
US3732915A (en) * | 1971-10-07 | 1973-05-15 | A Lugovoi | Vacuum arc furnace |
JPS60177139A (en) * | 1984-02-23 | 1985-09-11 | Daido Steel Co Ltd | Manufacture of extremely clean steel |
EP1679384B1 (en) * | 2003-10-08 | 2010-12-22 | Hitachi Metals, Ltd. | Method for producing steel ingot |
US20060198419A1 (en) * | 2005-03-04 | 2006-09-07 | Allan Intermill | Cemented electrode joint and process for curing the same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1434395A (en) * | 1920-01-30 | 1922-11-07 | Metal & Thermit Corp | Electric furnace |
US1555313A (en) * | 1920-03-06 | 1925-09-29 | Rohn Wilhelm | Process of melting and degasifying metals under reduced pressure |
US2234127A (en) * | 1936-12-24 | 1941-03-04 | Mautsch Robert | Process of manufacture of a metallurgical product intended to bemelted for forming ametal or an alloy |
GB671171A (en) * | 1950-05-02 | 1952-04-30 | Metro Cutanit Ltd | An improved process for forming ingots of refractory metal |
US3072982A (en) * | 1953-07-13 | 1963-01-15 | Westinghouse Electric Corp | Method of producing sound and homogeneous ingots |
-
1961
- 1961-11-20 US US153650A patent/US3235373A/en not_active Expired - Lifetime
-
1962
- 1962-08-24 GB GB32579/62A patent/GB1002106A/en not_active Expired
- 1962-08-27 LU LU42271D patent/LU42271A1/xx unknown
- 1962-09-05 NL NL282866A patent/NL282866A/xx unknown
- 1962-10-01 BE BE623082A patent/BE623082A/xx unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2424327A1 (en) * | 1978-04-24 | 1979-11-23 | Latrobe Steel Co | STEEL FOR BEARINGS |
FR2426738A1 (en) * | 1978-05-24 | 1979-12-21 | Ver Edelstahlwerke Ag | PROCESS FOR THE MANUFACTURING OF CONSUMABLE ELECTRODES OF LARGE DIAMETER FOR THE REFUSION OF METALS |
Also Published As
Publication number | Publication date |
---|---|
NL282866A (en) | 1965-01-11 |
LU42271A1 (en) | 1963-02-27 |
BE623082A (en) | 1963-04-01 |
US3235373A (en) | 1966-02-15 |
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