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JPS55125220A - Production of extra low-carbon steel - Google Patents

Production of extra low-carbon steel

Info

Publication number
JPS55125220A
JPS55125220A JP3238079A JP3238079A JPS55125220A JP S55125220 A JPS55125220 A JP S55125220A JP 3238079 A JP3238079 A JP 3238079A JP 3238079 A JP3238079 A JP 3238079A JP S55125220 A JPS55125220 A JP S55125220A
Authority
JP
Japan
Prior art keywords
gas
carbon steel
extra low
blowing
blown
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
JP3238079A
Other languages
Japanese (ja)
Other versions
JPS5952203B2 (en
Inventor
Motoo Hattori
Kaoru Masame
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP3238079A priority Critical patent/JPS5952203B2/en
Publication of JPS55125220A publication Critical patent/JPS55125220A/en
Publication of JPS5952203B2 publication Critical patent/JPS5952203B2/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

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

PURPOSE:To accelerate decarburization and produce the extra low carbon steel in a short time by top-spouting the jet of the mixed gases of oxygen and inert gas after the blowing by pure oxygen. CONSTITUTION:Pure oxygen gas is blown in a reduced-pressure atmosphere. When the C content in molten steel becomes around 0.1%, the gases mixed with 50% of inert gas (Ar+N2 or N2) are top-blown. Furter at the end period of blowing where the C content becomes around 0.01%, the jet of the mixed gases of inert gas: O2 gas=75:25 are top-spouted to perform blowing, whereby the product is obtained. Namely, O2 and mixed gases are blown under a vacuum to accelerate the stirruing and diffusion in the molten steel simultaneously and at the same time expand the effective reaction interface on the gas side. As a result of this, the extra low-carbon steel may be produced at the rate of decarburization which is practically the same as that in conventional methods.
JP3238079A 1979-03-22 1979-03-22 Manufacturing method of ultra-low carbon steel Expired JPS5952203B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3238079A JPS5952203B2 (en) 1979-03-22 1979-03-22 Manufacturing method of ultra-low carbon steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3238079A JPS5952203B2 (en) 1979-03-22 1979-03-22 Manufacturing method of ultra-low carbon steel

Publications (2)

Publication Number Publication Date
JPS55125220A true JPS55125220A (en) 1980-09-26
JPS5952203B2 JPS5952203B2 (en) 1984-12-18

Family

ID=12357338

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3238079A Expired JPS5952203B2 (en) 1979-03-22 1979-03-22 Manufacturing method of ultra-low carbon steel

Country Status (1)

Country Link
JP (1) JPS5952203B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0347884A2 (en) * 1988-06-21 1989-12-27 Kawasaki Steel Corporation Process for vacuum degassing and decarbonization with temperature drop compensating feature
WO2001073140A1 (en) * 2000-03-29 2001-10-04 Usinor Vacuum treatment of cast metal with simultaneous helium-injection stirring

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077802U (en) * 1983-11-02 1985-05-30 ソニーマグネスケール株式会社 Piston position detection device
JPS61202702U (en) * 1985-06-11 1986-12-19

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0347884A2 (en) * 1988-06-21 1989-12-27 Kawasaki Steel Corporation Process for vacuum degassing and decarbonization with temperature drop compensating feature
JPH0277518A (en) * 1988-06-21 1990-03-16 Kawasaki Steel Corp Method for vacuum-degasifying and decarburizing molten steel
US4979983A (en) * 1988-06-21 1990-12-25 Kawasaki Steel Corporation Process for vacuum degassing and decarbonization with temperature drop compensating feature
WO2001073140A1 (en) * 2000-03-29 2001-10-04 Usinor Vacuum treatment of cast metal with simultaneous helium-injection stirring
US6843826B2 (en) 2000-03-29 2005-01-18 Usinor Vacuum treatment of molten metal with simultaneous stirring by helium injection

Also Published As

Publication number Publication date
JPS5952203B2 (en) 1984-12-18

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