TW201612321A - Melting method of high cleanness steel - Google Patents

Melting method of high cleanness steel

Info

Publication number
TW201612321A
TW201612321A TW104143474A TW104143474A TW201612321A TW 201612321 A TW201612321 A TW 201612321A TW 104143474 A TW104143474 A TW 104143474A TW 104143474 A TW104143474 A TW 104143474A TW 201612321 A TW201612321 A TW 201612321A
Authority
TW
Taiwan
Prior art keywords
steel
melting
melting method
high cleanness
refluxing
Prior art date
Application number
TW104143474A
Other languages
Chinese (zh)
Other versions
TWI593803B (en
Inventor
Naoki Kikuchi
Hidetoshi Matsuno
Takeshi Murai
Yuji Miki
Original Assignee
Jfe Steel Corp
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 Jfe Steel Corp filed Critical Jfe Steel Corp
Publication of TW201612321A publication Critical patent/TW201612321A/en
Application granted granted Critical
Publication of TWI593803B publication Critical patent/TWI593803B/en

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
    • C21C7/076—Use of slags or fluxes as treating agents
    • 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
    • C21C7/06—Deoxidising, e.g. killing
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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

A melting method of high cleanness steel is provided in the invention. The method uses a reflux vacuum degas apparatus to melt steel and to substantially decrease defects caused by the inclusions in steel products. The melting method of the high cleanness steel in the invention is a melting method of refluxing melting steel in a ladle in the reflux vacuum degas apparatus as running a decarbonizing process and adding a deoxidizing agent to run a killed process. The melting method of the high cleanness steel is characterized as below: blowing amounts of a refluxing gas in the killed process are set to be equal to and over 4 L(Normal)/min.t; the melting steel is refluxed as a cold charge is thrown in to adjust a temperature of the melting steel; and a relationship between a refluxing time T after the cold charge is thrown in and additions W of the cold charge per ton of the melting steel is set to satisfy an equation as below: T(min) ≥ 0.25W(kg/t)+2.
TW104143474A 2012-01-27 2012-04-27 Melting method of high cleanness steel TWI593803B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012015051 2012-01-27

Publications (2)

Publication Number Publication Date
TW201612321A true TW201612321A (en) 2016-04-01
TWI593803B TWI593803B (en) 2017-08-01

Family

ID=48835648

Family Applications (2)

Application Number Title Priority Date Filing Date
TW101115232A TW201331377A (en) 2012-01-27 2012-04-27 Melting method of high cleanness steel
TW104143474A TWI593803B (en) 2012-01-27 2012-04-27 Melting method of high cleanness steel

Family Applications Before (1)

Application Number Title Priority Date Filing Date
TW101115232A TW201331377A (en) 2012-01-27 2012-04-27 Melting method of high cleanness steel

Country Status (4)

Country Link
KR (1) KR101361867B1 (en)
CN (1) CN103225009B (en)
BR (1) BR102012010090B1 (en)
TW (2) TW201331377A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6547901B2 (en) * 2016-03-23 2019-07-24 日本製鉄株式会社 Hot metal pretreatment method and hot metal pretreatment control device
CN106180737A (en) * 2016-07-07 2016-12-07 四川朗峰电子材料有限公司 A kind of method preparing submicron metal
CN109487039B (en) * 2018-11-27 2020-07-31 马鞍山钢铁股份有限公司 Method for controlling inclusions in ultra-low carbon steel based on straight-barrel type vacuum refining device
EP3940088B1 (en) * 2019-03-13 2023-11-22 JFE Steel Corporation Method for producing ti-containing ultralow-carbon steel

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3279157B2 (en) * 1995-12-04 2002-04-30 日本鋼管株式会社 Melting method of clean steel
JP4582826B2 (en) * 1997-09-12 2010-11-17 Ｊｆｅスチール株式会社 Manufacturing method of clean steel with RH degassing equipment
JP3903580B2 (en) * 1998-03-26 2007-04-11 Ｊｆｅスチール株式会社 Method of melting high cleanliness steel
JPH11293331A (en) * 1998-04-10 1999-10-26 Kawasaki Steel Corp Refining of molten steel
JP4035904B2 (en) 1998-12-10 2008-01-23 Ｊｆｅスチール株式会社 Method for producing ultra-low carbon steel with excellent cleanability
JP2001271117A (en) * 2000-03-27 2001-10-02 Sumitomo Metal Ind Ltd Method for top-blowing refining agent
KR100424808B1 (en) * 2000-10-17 2004-03-30 주식회사 포스코 Method for determining the circulation time of the molten steel in the Ruhrstahl-Heraues degassing device
JP4207820B2 (en) 2004-03-25 2009-01-14 Ｊｆｅスチール株式会社 How to use vacuum degassing equipment
CN102251076B (en) * 2010-05-21 2013-04-03 宝山钢铁股份有限公司 RH vacuum refining method of ultra-low carbon stainless steel
CN102071287B (en) * 2010-12-20 2013-11-06 攀钢集团钢铁钒钛股份有限公司 Method for melting high-temperature-resistance and high-pressure-resistance alloy steel

Also Published As

Publication number Publication date
TWI593803B (en) 2017-08-01
TW201331377A (en) 2013-08-01
BR102012010090B1 (en) 2018-12-04
KR20130087345A (en) 2013-08-06
CN103225009A (en) 2013-07-31
CN103225009B (en) 2015-03-11
KR101361867B1 (en) 2014-02-12
BR102012010090A2 (en) 2014-08-26

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