JPS5760012A - Production of extremely low nitrogen stainless steel - Google Patents

Production of extremely low nitrogen stainless steel

Info

Publication number
JPS5760012A
JPS5760012A JP13480180A JP13480180A JPS5760012A JP S5760012 A JPS5760012 A JP S5760012A JP 13480180 A JP13480180 A JP 13480180A JP 13480180 A JP13480180 A JP 13480180A JP S5760012 A JPS5760012 A JP S5760012A
Authority
JP
Japan
Prior art keywords
molten steel
steel
gaseous
extremely low
low nitrogen
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
JP13480180A
Other languages
Japanese (ja)
Inventor
Masayoshi Yokoyama
Tatsu Kishida
Yuji Tanaka
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 JP13480180A priority Critical patent/JPS5760012A/en
Publication of JPS5760012A publication Critical patent/JPS5760012A/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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/005—Manufacture of stainless steel

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE:To produce a stainless steel of extremely low nitrogen concn. by charging the molten steel refined in a converter as it is into an AOD furnace, and controlling its components by decarbonizing the same then subjecting the molten steel to vacuum degassing after oxygen blowing. CONSTITUTION:In a converter, molten steel is subjected to decarbonization, dephosphorization, desulfurization, etc. by oxygen blowing, and the steel is tapped in an undisoxidized state into a ladle. The molten steel in the ladle is charged into an AOD furnace where gaseous mixture of Ar and O2 are glown to the molten steel, whereby it is decarbonized. When the C attains a prescribed value, the blowing gases are charged over to gaseous Ar alone, thence a reducing agent such as Fe-Si alloy is charged to reduce Cr. Thence, floating slag is removed, after which the gaseous Ar is changed over to gaseous O2 and oxygen blowing is canied out. The m olten steel is then contained in a ladle, and is carried to a DH vacuum degassing plant, where it is vacuum degassed, whereby the level of O is lowered. Thereby, the stainless steel of an extremely low nitrogen level is obtained.
JP13480180A 1980-09-26 1980-09-26 Production of extremely low nitrogen stainless steel Pending JPS5760012A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13480180A JPS5760012A (en) 1980-09-26 1980-09-26 Production of extremely low nitrogen stainless steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13480180A JPS5760012A (en) 1980-09-26 1980-09-26 Production of extremely low nitrogen stainless steel

Publications (1)

Publication Number Publication Date
JPS5760012A true JPS5760012A (en) 1982-04-10

Family

ID=15136840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13480180A Pending JPS5760012A (en) 1980-09-26 1980-09-26 Production of extremely low nitrogen stainless steel

Country Status (1)

Country Link
JP (1) JPS5760012A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6177013U (en) * 1984-10-29 1986-05-23
JPH083622A (en) * 1994-06-20 1996-01-09 Daido Steel Co Ltd Production of low nitrogen steel
JPH10140227A (en) * 1996-11-05 1998-05-26 Nkk Corp Production of high alloy steel by joining two molten steels
WO2006050963A3 (en) * 2004-11-12 2006-09-28 Sms Demag Ag Production of stainless steel of aisi 4xx grade ferritic steel in an aod converter
KR101123035B1 (en) 2006-11-30 2012-03-21 에스엠에스 지마크 악티엔게젤샤프트 Method and device for producing stainless steel without using a supply of electrical energy, based on pig-iron that has been pre-treated in a ddd installation
JP2017534763A (en) * 2014-10-20 2017-11-24 ミーハナイト ワールドワイド コーポレーション インコーポレーテッドＭｅｅｈａｎｉｔｅ Ｗｏｒｌｄｗｉｄｅ Ｃｏｒｐｏｒａｔｉｏｎ Ｉｎｃ Iron or steel casting method, charge used in the method, and method of manufacturing the charge

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6177013U (en) * 1984-10-29 1986-05-23
JPH083622A (en) * 1994-06-20 1996-01-09 Daido Steel Co Ltd Production of low nitrogen steel
JPH10140227A (en) * 1996-11-05 1998-05-26 Nkk Corp Production of high alloy steel by joining two molten steels
WO2006050963A3 (en) * 2004-11-12 2006-09-28 Sms Demag Ag Production of stainless steel of aisi 4xx grade ferritic steel in an aod converter
JP2008519906A (en) * 2004-11-12 2008-06-12 エス・エム・エス・デマーク・アクチエンゲゼルシャフト Manufacturing method of AISI standard 4xx ferritic steel class in AOD converter
KR101152676B1 (en) 2004-11-12 2012-06-15 에스엠에스 지마크 악티엔게젤샤프트 Production of stainless steel of aisi 4xx grade ferritic steel in an aod converter
KR101123035B1 (en) 2006-11-30 2012-03-21 에스엠에스 지마크 악티엔게젤샤프트 Method and device for producing stainless steel without using a supply of electrical energy, based on pig-iron that has been pre-treated in a ddd installation
JP2017534763A (en) * 2014-10-20 2017-11-24 ミーハナイト ワールドワイド コーポレーション インコーポレーテッドＭｅｅｈａｎｉｔｅ Ｗｏｒｌｄｗｉｄｅ Ｃｏｒｐｏｒａｔｉｏｎ Ｉｎｃ Iron or steel casting method, charge used in the method, and method of manufacturing the charge

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