JPS55164019A - Nitrogen adding agent for iron and steel and preparation thereof - Google Patents

Nitrogen adding agent for iron and steel and preparation thereof

Info

Publication number
JPS55164019A
JPS55164019A JP7055979A JP7055979A JPS55164019A JP S55164019 A JPS55164019 A JP S55164019A JP 7055979 A JP7055979 A JP 7055979A JP 7055979 A JP7055979 A JP 7055979A JP S55164019 A JPS55164019 A JP S55164019A
Authority
JP
Japan
Prior art keywords
iron
gas
steel
nitriding
oxidized
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
JP7055979A
Other languages
Japanese (ja)
Other versions
JPS5943965B2 (en
Inventor
Toshio Toyoda
Koichi Oku
Kuniteru Suzuki
Tatsuhiko Fujinuma
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.)
Japan Metals and Chemical Co Ltd
Original Assignee
Japan Metals and Chemical Co 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 Japan Metals and Chemical Co Ltd filed Critical Japan Metals and Chemical Co Ltd
Priority to JP7055979A priority Critical patent/JPS5943965B2/en
Publication of JPS55164019A publication Critical patent/JPS55164019A/en
Publication of JPS5943965B2 publication Critical patent/JPS5943965B2/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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases

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)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Powder Metallurgy (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

PURPOSE:To prepare ritriding iron as an N adding agent to be added to a molten iron and steel containing 1.0-10.5% of N by a method wherein iron powder obtained by reducing oxidized iron powder is nitrided by heating within a gas stream such as decomposed ammonia gas or the like. CONSTITUTION:Oxidized iron powder, scale, good quality iron ore ore the like is ground to 10 mesh or less and introduced into a reductive nitriding furnace. The atmosphere within a furnace is replaced to a reductive gas atmosphere such as decomposed ammonia gas, hydrogen gas or CO gas and oxidized iron is reduced to iron by heating to 500-1,100 deg.C. Subsequently, this iron is maintained at 350- 750 deg.C for 2-50hrs. within a mixed gas of nitrogen and hydrogen or decomposed ammonia gas to obtain a nitriding iron containing N; 1.0-10.5wt%. This nitriding iron is prepared as a sintered product or a powdery product due to the height of temp. during reducing reaction and this product is added to pig iron or steel in a molten condition and N content thereof is easily increased to an objective value.
JP7055979A 1979-06-07 1979-06-07 Nitrogen additive in steel and its manufacturing method Expired JPS5943965B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7055979A JPS5943965B2 (en) 1979-06-07 1979-06-07 Nitrogen additive in steel and its manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7055979A JPS5943965B2 (en) 1979-06-07 1979-06-07 Nitrogen additive in steel and its manufacturing method

Publications (2)

Publication Number Publication Date
JPS55164019A true JPS55164019A (en) 1980-12-20
JPS5943965B2 JPS5943965B2 (en) 1984-10-25

Family

ID=13435003

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7055979A Expired JPS5943965B2 (en) 1979-06-07 1979-06-07 Nitrogen additive in steel and its manufacturing method

Country Status (1)

Country Link
JP (1) JPS5943965B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08319554A (en) * 1995-05-23 1996-12-03 Daido Hoxan Inc Method for nitriding steel
JP2012012679A (en) * 2010-07-02 2012-01-19 Jfe Steel Corp Method for reducing carbon dioxide emissions
RU2665658C1 (en) * 2017-05-11 2018-09-03 Общество с ограниченной ответственностью "НАУЧНО-ПРОИЗВОДСТВЕННОЕ ПРЕДПРИЯТИЕ ВакЭТО" (ООО НПП ВакЭТО) Method of iron alloying by nitrogen
CN112553411A (en) * 2020-12-04 2021-03-26 山东钢铁集团日照有限公司 Method for trace accurate nitrogen increase of cold-rolled deep-drawing steel through RH vacuum decarburization
CN115652025A (en) * 2022-10-28 2023-01-31 南京钢铁股份有限公司 Accurate nitrogen increasing method for nitrogen-containing non-quenched and tempered steel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08319554A (en) * 1995-05-23 1996-12-03 Daido Hoxan Inc Method for nitriding steel
JP2012012679A (en) * 2010-07-02 2012-01-19 Jfe Steel Corp Method for reducing carbon dioxide emissions
RU2665658C1 (en) * 2017-05-11 2018-09-03 Общество с ограниченной ответственностью "НАУЧНО-ПРОИЗВОДСТВЕННОЕ ПРЕДПРИЯТИЕ ВакЭТО" (ООО НПП ВакЭТО) Method of iron alloying by nitrogen
CN112553411A (en) * 2020-12-04 2021-03-26 山东钢铁集团日照有限公司 Method for trace accurate nitrogen increase of cold-rolled deep-drawing steel through RH vacuum decarburization
CN115652025A (en) * 2022-10-28 2023-01-31 南京钢铁股份有限公司 Accurate nitrogen increasing method for nitrogen-containing non-quenched and tempered steel
CN115652025B (en) * 2022-10-28 2024-04-16 南京钢铁股份有限公司 Accurate nitrogen increasing method for nitrogen-containing non-quenched and tempered steel

Also Published As

Publication number Publication date
JPS5943965B2 (en) 1984-10-25

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