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EP0151872A3 - Vacuum treating steels - Google Patents

Vacuum treating steels Download PDF

Info

Publication number
EP0151872A3
EP0151872A3 EP84308261A EP84308261A EP0151872A3 EP 0151872 A3 EP0151872 A3 EP 0151872A3 EP 84308261 A EP84308261 A EP 84308261A EP 84308261 A EP84308261 A EP 84308261A EP 0151872 A3 EP0151872 A3 EP 0151872A3
Authority
EP
European Patent Office
Prior art keywords
rod
steel
vacuum
bath
molten
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.)
Granted
Application number
EP84308261A
Other versions
EP0151872A2 (en
EP0151872B1 (en
Inventor
Joseph Mulcahy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
J Mulcahy Enterprises Inc
Original Assignee
J Mulcahy Enterprises Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by J Mulcahy Enterprises Inc filed Critical J Mulcahy Enterprises Inc
Priority to AT84308261T priority Critical patent/ATE39948T1/en
Publication of EP0151872A2 publication Critical patent/EP0151872A2/en
Publication of EP0151872A3 publication Critical patent/EP0151872A3/en
Application granted granted Critical
Publication of EP0151872B1 publication Critical patent/EP0151872B1/en
Expired legal-status Critical Current

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
    • 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
    • C22B9/04—Refining by applying a vacuum

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Coating With Molten Metal (AREA)

Abstract

Molten steel or other electroconductive metal is treated with vacuum to remove dissolved gases therefrom. A rod (28) of molten steel is drawn from a bath (14) by applying vacuum to a vertical tube (22) dipping into the molten bath (14). An electrical coil (26) surrounding the tube (22) applies an intense magnetic field to the steel rod by the passage of high frequency alternating current through the coil (26). The rod (28) is compressed radially inwardly by the magnetic field exposing the whole of the external surface of the rod (28) to vacuum. At the same time, the induced eddy currents superheat the steel rod. The large surface area of application of vacuum combined with the narrow dimension through which the gas must travel ensure rapid and efficient removal of the gases. The procedure is repeated until all the steel in the bath has been treated. Lack of contact of the steel rod (28) with the tube surface eliminates loss of heat by convection and the superheating of the steel rod by the eddy currents ensures that the overall heat losses are minimal during processing of the molten metal bath.
EP84308261A 1984-01-20 1984-11-28 Vacuum treating steels Expired EP0151872B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84308261T ATE39948T1 (en) 1984-01-20 1984-11-28 METHOD OF VACUUM TREATMENT OF STEEL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA000445735A CA1216430A (en) 1984-01-20 1984-01-20 Vacuum treating steels
CA445735 1984-01-20

Publications (3)

Publication Number Publication Date
EP0151872A2 EP0151872A2 (en) 1985-08-21
EP0151872A3 true EP0151872A3 (en) 1986-06-25
EP0151872B1 EP0151872B1 (en) 1989-01-11

Family

ID=4126993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84308261A Expired EP0151872B1 (en) 1984-01-20 1984-11-28 Vacuum treating steels

Country Status (5)

Country Link
EP (1) EP0151872B1 (en)
JP (1) JPS60159110A (en)
AT (1) ATE39948T1 (en)
CA (1) CA1216430A (en)
DE (1) DE3476086D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2046149C1 (en) * 1994-01-19 1995-10-20 Акционерное общество "Нижнетагильский металлургический комбинат" Method of vacuum refining of metal and apparatus for performing the same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT138020B (en) * 1933-07-19 1934-06-25 Berndorfer Metallwarenfabrik Method and device for degassing metal baths.
DE1147714C2 (en) * 1957-08-01 1963-11-07
US3347538A (en) * 1965-04-28 1967-10-17 Mc Graw Edison Co Apparatus for the vacuum degassing of molten metal
DE1268790B (en) * 1961-08-09 1968-05-22 Erik Allan Olsson Process for the continuous degassing of metal melts
DE1508214A1 (en) * 1966-09-14 1970-03-05 Kloeckner Werke Ag Method and device for degassing molten metal, especially molten steel, under reduced pressure
US4298376A (en) * 1980-04-14 1981-11-03 Kobe Steel, Ltd. Method for treating molten steel and apparatus therefor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT138020B (en) * 1933-07-19 1934-06-25 Berndorfer Metallwarenfabrik Method and device for degassing metal baths.
DE1147714C2 (en) * 1957-08-01 1963-11-07
DE1268790B (en) * 1961-08-09 1968-05-22 Erik Allan Olsson Process for the continuous degassing of metal melts
US3347538A (en) * 1965-04-28 1967-10-17 Mc Graw Edison Co Apparatus for the vacuum degassing of molten metal
DE1508214A1 (en) * 1966-09-14 1970-03-05 Kloeckner Werke Ag Method and device for degassing molten metal, especially molten steel, under reduced pressure
US4298376A (en) * 1980-04-14 1981-11-03 Kobe Steel, Ltd. Method for treating molten steel and apparatus therefor

Also Published As

Publication number Publication date
ATE39948T1 (en) 1989-01-15
JPH0142324B2 (en) 1989-09-12
CA1216430A (en) 1987-01-13
JPS60159110A (en) 1985-08-20
EP0151872A2 (en) 1985-08-21
EP0151872B1 (en) 1989-01-11
DE3476086D1 (en) 1989-02-16

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