JPS5497519A - Production of steel resistant to hydrogen sulfide cracking - Google Patents

Production of steel resistant to hydrogen sulfide cracking

Info

Publication number
JPS5497519A
JPS5497519A JP467278A JP467278A JPS5497519A JP S5497519 A JPS5497519 A JP S5497519A JP 467278 A JP467278 A JP 467278A JP 467278 A JP467278 A JP 467278A JP S5497519 A JPS5497519 A JP S5497519A
Authority
JP
Japan
Prior art keywords
steel
molten steel
hydrogen sulfide
rare earth
production
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.)
Pending
Application number
JP467278A
Other languages
Japanese (ja)
Inventor
Mamoru Toyoda
Tomohiko Kimura
Tadao Watabe
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 JP467278A priority Critical patent/JPS5497519A/en
Publication of JPS5497519A publication Critical patent/JPS5497519A/en
Pending 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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/064—Dephosphorising; Desulfurising

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:Molten steel is treated for first desulfnrization and then deoxidization. The treated molten steel is poured into continuous casting mold together with wire of rare earth element to produce steel having excellent resistivity to hydrogen sulfide cracking. CONSTITUTION:Na2CO3 or CaCO3 is added to molten steel in ladel and agitated together to desulfurize contained S below 0.004%. Into this low sulfur steel, Ar gas is blown to bubble the steel, thereby deoxidizing the steel to reduce (0) content below 0.0030%. While the molten steel is poured into continuous casting mold, a wire material consisting of iron-coated rare earth element is simultaneously added to the molten steel. The added rare earth metal is efficiently incorporated into the molten steel, effecting complete spheroidization of included material such as MnS in the molten steel and resulting in the production of steel having excellent hydrogen sulfide crack resitivity.
JP467278A 1978-01-18 1978-01-18 Production of steel resistant to hydrogen sulfide cracking Pending JPS5497519A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP467278A JPS5497519A (en) 1978-01-18 1978-01-18 Production of steel resistant to hydrogen sulfide cracking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP467278A JPS5497519A (en) 1978-01-18 1978-01-18 Production of steel resistant to hydrogen sulfide cracking

Publications (1)

Publication Number Publication Date
JPS5497519A true JPS5497519A (en) 1979-08-01

Family

ID=11590387

Family Applications (1)

Application Number Title Priority Date Filing Date
JP467278A Pending JPS5497519A (en) 1978-01-18 1978-01-18 Production of steel resistant to hydrogen sulfide cracking

Country Status (1)

Country Link
JP (1) JPS5497519A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005060739A (en) * 2003-08-18 2005-03-10 Nippon Steel Corp Method for producing molten steel enabling to prevent nozzle clogging

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS501023A (en) * 1973-05-07 1975-01-08
JPS5177531A (en) * 1974-12-28 1976-07-05 Nippon Steel Corp Renzokuchuzoniokeru chuhenhyomenketsukanboshihoho

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS501023A (en) * 1973-05-07 1975-01-08
JPS5177531A (en) * 1974-12-28 1976-07-05 Nippon Steel Corp Renzokuchuzoniokeru chuhenhyomenketsukanboshihoho

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005060739A (en) * 2003-08-18 2005-03-10 Nippon Steel Corp Method for producing molten steel enabling to prevent nozzle clogging

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