JPS5591943A - Continuous annealing method for cold rolled steel strip - Google Patents

Continuous annealing method for cold rolled steel strip

Info

Publication number
JPS5591943A
JPS5591943A JP16280778A JP16280778A JPS5591943A JP S5591943 A JPS5591943 A JP S5591943A JP 16280778 A JP16280778 A JP 16280778A JP 16280778 A JP16280778 A JP 16280778A JP S5591943 A JPS5591943 A JP S5591943A
Authority
JP
Japan
Prior art keywords
strip
heating
combustion
rolled steel
cold rolled
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
JP16280778A
Other languages
Japanese (ja)
Other versions
JPS5844133B2 (en
Inventor
Ichiro Imai
Takashi Furuya
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
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP16280778A priority Critical patent/JPS5844133B2/en
Publication of JPS5591943A publication Critical patent/JPS5591943A/en
Publication of JPS5844133B2 publication Critical patent/JPS5844133B2/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE:To manufacture the cold rolled steel strip having a suprior appearance and surface property at low cost, by decreasing the air ratio for combustion of heating zone gradually and also, reducing oxidation film produced by direct heating, at the time of carrying out continuous annealing of the cold rolled steel strip by direct fire heating. CONSTITUTION:Cold rolled steel strip with rolling oil or iron powder stuck on the surface, is annealed without cleaning previously at the direct heating furnace by the direct fire type burner. On this occasion, mean air ratio for combustion is regulated to 1.05-1.40 the whole combustion process as the strip panes, and temperature of the strip is risen by heating as the strip panes through the heating zone of the direct fire furnace and then, the surface is oxidized. The air ratio for combustion is decreased gradually as the progress of the treatment of the strip in the furnace and is regulated to 0.6-1.0 or less at the last stage of the heating zone and also, temperature of the strip is regulated to 400-900 deg.C. Rolling oil etc. stuck to the surface of the strip, is burnt and iron powder is removed. Then, formed oxidized film is reduced in the atmosphere of low air ratio for combustion and the strip having a superior surface property, is taken out after cooling.
JP16280778A 1978-12-29 1978-12-29 Continuous annealing method for cold rolled steel strip Expired JPS5844133B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16280778A JPS5844133B2 (en) 1978-12-29 1978-12-29 Continuous annealing method for cold rolled steel strip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16280778A JPS5844133B2 (en) 1978-12-29 1978-12-29 Continuous annealing method for cold rolled steel strip

Publications (2)

Publication Number Publication Date
JPS5591943A true JPS5591943A (en) 1980-07-11
JPS5844133B2 JPS5844133B2 (en) 1983-10-01

Family

ID=15761584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16280778A Expired JPS5844133B2 (en) 1978-12-29 1978-12-29 Continuous annealing method for cold rolled steel strip

Country Status (1)

Country Link
JP (1) JPS5844133B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006045615A (en) * 2004-08-04 2006-02-16 Jfe Steel Kk Cold rolled steel sheet manufacturing method
EP1816219A1 (en) * 2006-02-03 2007-08-08 Linde Aktiengesellschaft Process for the heat treatment of metal strips by direct flame impingement
JP2010121212A (en) * 2009-12-22 2010-06-03 Jfe Steel Corp Method for producing cold-rolled steel sheet
WO2011152017A1 (en) * 2010-05-31 2011-12-08 Ｊｆｅスチール株式会社 High-strength molten-zinc-plated steel sheet having excellent bendability and weldability, and process for production thereof
CN104673977A (en) * 2015-02-10 2015-06-03 山西太钢不锈钢股份有限公司 Startup warming method of continuous annealing furnace containing non-oxidation section silicon steel
EP2460897A4 (en) * 2009-07-29 2017-07-12 JFE Steel Corporation Process for production of high-strength cold-rolled steel sheet having excellent chemical conversion processability

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0233944B1 (en) 1985-07-18 1991-03-06 Nippon Kokan Kabushiki Kaisha Continuous strip steel processing line having direct firing furnace

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006045615A (en) * 2004-08-04 2006-02-16 Jfe Steel Kk Cold rolled steel sheet manufacturing method
EP1816219A1 (en) * 2006-02-03 2007-08-08 Linde Aktiengesellschaft Process for the heat treatment of metal strips by direct flame impingement
WO2007087973A3 (en) * 2006-02-03 2007-11-29 Linde Ag Process for the heat treatment of steel strips in a continuous furnace with oxy-fuel burners
JP2009525401A (en) * 2006-02-03 2009-07-09 リンデ アクチエンゲゼルシヤフト Heat treatment method for steel strip in a continuous heat treatment furnace equipped with an oxy-fuel burner
US9322598B2 (en) 2006-02-03 2016-04-26 Linde Aktiengesellschaft Process for the heat treatment of steel strips
EP2460897A4 (en) * 2009-07-29 2017-07-12 JFE Steel Corporation Process for production of high-strength cold-rolled steel sheet having excellent chemical conversion processability
JP2010121212A (en) * 2009-12-22 2010-06-03 Jfe Steel Corp Method for producing cold-rolled steel sheet
WO2011152017A1 (en) * 2010-05-31 2011-12-08 Ｊｆｅスチール株式会社 High-strength molten-zinc-plated steel sheet having excellent bendability and weldability, and process for production thereof
JP2012012703A (en) * 2010-05-31 2012-01-19 Jfe Steel Corp High-strength hot-dip galvanized steel sheet excellent in bendability and weldability, and manufacturing method of the same
KR101304077B1 (en) * 2010-05-31 2013-09-05 제이에프이 스틸 가부시키가이샤 High strength galvanized steel sheet having excellent bendability and weldability, and method of manufacturing the same
US10196727B2 (en) 2010-05-31 2019-02-05 Jfe Steel Corporation High strength galvanized steel sheet having excellent bendability and weldability, and method of manufacturing the same
CN104673977A (en) * 2015-02-10 2015-06-03 山西太钢不锈钢股份有限公司 Startup warming method of continuous annealing furnace containing non-oxidation section silicon steel

Also Published As

Publication number Publication date
JPS5844133B2 (en) 1983-10-01

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