JPS5763620A - Denitriding and refining method for high chromium steel - Google Patents

Denitriding and refining method for high chromium steel

Info

Publication number
JPS5763620A
JPS5763620A JP12145280A JP12145280A JPS5763620A JP S5763620 A JPS5763620 A JP S5763620A JP 12145280 A JP12145280 A JP 12145280A JP 12145280 A JP12145280 A JP 12145280A JP S5763620 A JPS5763620 A JP S5763620A
Authority
JP
Japan
Prior art keywords
molten steel
denitriding
high vacuum
oxidizer
supply
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
JP12145280A
Other languages
Japanese (ja)
Other versions
JPS6159367B2 (en
Inventor
Kaoru Masame
Masayuki Taga
Kazuo Ishihara
Takeyoshi Sakane
Mitsuyuki Morishige
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 JP12145280A priority Critical patent/JPS5763620A/en
Publication of JPS5763620A publication Critical patent/JPS5763620A/en
Publication of JPS6159367B2 publication Critical patent/JPS6159367B2/ja
Granted 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 lower the content of nitrogen by interrupting the supply of an oxidizing gas and an oxidizer temporaily in the region where the carbon concn. in molten steel is above the critical carbon concn. in a decarbonization process and subjecting the molten steel to high vacuum treatment at the time of producing high chromium steels with a vacuum refining furnace. CONSTITUTION:A denitriding and refining method of kexecuting high vacuum treament during oxygen blown refining and decarbonizing at the time of producing high chromium steels such as alloy steels contg. 5-35 Cr, and ferrite or austenite stainless steels. At this time, the supply of an oxidative gas such as oxygen and an oxidizer is interrupted temporarily in the region where the carbon concn. in the molten steel is above the critical carbon concn. and the molten steel is subjected to high vacuum treatment, whereby denitriding reaction is accelerated. In some cases, the molten steel is sujbected to disoxidation treatment by adding a disoxidizer after the temporary interruption of the supply of the oxidative gas and oxidizer, thence it is subjected to the high vacuum treatment.
JP12145280A 1980-09-01 1980-09-01 Denitriding and refining method for high chromium steel Granted JPS5763620A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12145280A JPS5763620A (en) 1980-09-01 1980-09-01 Denitriding and refining method for high chromium steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12145280A JPS5763620A (en) 1980-09-01 1980-09-01 Denitriding and refining method for high chromium steel

Publications (2)

Publication Number Publication Date
JPS5763620A true JPS5763620A (en) 1982-04-17
JPS6159367B2 JPS6159367B2 (en) 1986-12-16

Family

ID=14811477

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12145280A Granted JPS5763620A (en) 1980-09-01 1980-09-01 Denitriding and refining method for high chromium steel

Country Status (1)

Country Link
JP (1) JPS5763620A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0591971A1 (en) * 1992-10-07 1994-04-13 Kawasaki Steel Corporation Method of degassing and decarburizing stainless molten steel
WO2013060101A1 (en) * 2011-10-25 2013-05-02 宝山钢铁股份有限公司 Method for smelting high-aluminum-low-silicon ultrapure ferritic stainless steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0591971A1 (en) * 1992-10-07 1994-04-13 Kawasaki Steel Corporation Method of degassing and decarburizing stainless molten steel
WO2013060101A1 (en) * 2011-10-25 2013-05-02 宝山钢铁股份有限公司 Method for smelting high-aluminum-low-silicon ultrapure ferritic stainless steel

Also Published As

Publication number Publication date
JPS6159367B2 (en) 1986-12-16

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