JPS5483608A - Heating method for steel hoop - Google Patents

Heating method for steel hoop

Info

Publication number
JPS5483608A
JPS5483608A JP15059377A JP15059377A JPS5483608A JP S5483608 A JPS5483608 A JP S5483608A JP 15059377 A JP15059377 A JP 15059377A JP 15059377 A JP15059377 A JP 15059377A JP S5483608 A JPS5483608 A JP S5483608A
Authority
JP
Japan
Prior art keywords
zone
steel hoop
direct flame
heating furnace
hoop
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
JP15059377A
Other languages
Japanese (ja)
Other versions
JPS5856736B2 (en
Inventor
Kiwamu Kurihara
Kenji Araki
Kazuhide Nakaoka
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP15059377A priority Critical patent/JPS5856736B2/en
Publication of JPS5483608A publication Critical patent/JPS5483608A/en
Publication of JPS5856736B2 publication Critical patent/JPS5856736B2/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 perform bright heating of steel hoop while preventing roll pickup in annealing of the steel hoop, by dividing a direct flame heating furnace into three or more zones, and by controlling the gas feed and air feed to each zone according to specific formulas. CONSTITUTION:In annealing of steel hoop 8, a direct flame heating furnace 3 is divided into zones not less than 3 to n. The direct flame heating furnace is operated with the gas feed quantity Qi and air feed quantity qi to the first zone (in this case, zone 4) satisfying formula 1, and with the gas feed quantity Qi and air feed quantity qi to the zone from 1 to n-1 (in this case, zone 1, 2, 3) satisfying formula 2. Hereby bright heating is performed without causing roll pickup (oxidation of the hoop, and adherence of foreign matter, e.g., iron powder, to the rolls). In the formulas 1, 2, A: theoretical air ratio = theoretical air quantity/gas quantity, i: zone number counting from the furnace inlet.
JP15059377A 1977-12-16 1977-12-16 Steel strip heating method Expired JPS5856736B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15059377A JPS5856736B2 (en) 1977-12-16 1977-12-16 Steel strip heating method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15059377A JPS5856736B2 (en) 1977-12-16 1977-12-16 Steel strip heating method

Publications (2)

Publication Number Publication Date
JPS5483608A true JPS5483608A (en) 1979-07-03
JPS5856736B2 JPS5856736B2 (en) 1983-12-16

Family

ID=15500264

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15059377A Expired JPS5856736B2 (en) 1977-12-16 1977-12-16 Steel strip heating method

Country Status (1)

Country Link
JP (1) JPS5856736B2 (en)

Also Published As

Publication number Publication date
JPS5856736B2 (en) 1983-12-16

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