JPS5511105A - Method and apparatus for controlling atmosphere in direct heating type nonoxidation furnace - Google Patents

Method and apparatus for controlling atmosphere in direct heating type nonoxidation furnace

Info

Publication number
JPS5511105A
JPS5511105A JP8143678A JP8143678A JPS5511105A JP S5511105 A JPS5511105 A JP S5511105A JP 8143678 A JP8143678 A JP 8143678A JP 8143678 A JP8143678 A JP 8143678A JP S5511105 A JPS5511105 A JP S5511105A
Authority
JP
Japan
Prior art keywords
furnace
nonoxidation
heating type
direct heating
atmosphere
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
JP8143678A
Other languages
Japanese (ja)
Other versions
JPS6032692B2 (en
Inventor
Hajime Hinoto
Hiromitsu Naito
Kazuhiko Yoshinari
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 JP8143678A priority Critical patent/JPS6032692B2/en
Publication of JPS5511105A publication Critical patent/JPS5511105A/en
Publication of JPS6032692B2 publication Critical patent/JPS6032692B2/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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere

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)
  • Control Of Heat Treatment Processes (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE:To improve surface characteristics of steel sheet to be treated, by controlling air ratio so that H2 gas may be present always in the furnace atmosphere of a direct heating type nonoxidation heating furnace. CONSTITUTION:The furnace atmosphere gas of a direct heating type nonoxidation heating furnace, especially a nonoxidation furnace for use in continuous annealing of cold rolled steel sheet, is detected and is controlled so as to contain always at least 0.1% hydrogen. Pref. air ratio is controlled so that the atmosphere gas contains hydrogen gas ranging from 0.5 to 2%. Hereby the heat treated steel is excellent in surface characteristics.
JP8143678A 1978-07-06 1978-07-06 Atmosphere control method and device for direct-fired non-oxidizing heating furnace Expired JPS6032692B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8143678A JPS6032692B2 (en) 1978-07-06 1978-07-06 Atmosphere control method and device for direct-fired non-oxidizing heating furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8143678A JPS6032692B2 (en) 1978-07-06 1978-07-06 Atmosphere control method and device for direct-fired non-oxidizing heating furnace

Publications (2)

Publication Number Publication Date
JPS5511105A true JPS5511105A (en) 1980-01-25
JPS6032692B2 JPS6032692B2 (en) 1985-07-30

Family

ID=13746332

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8143678A Expired JPS6032692B2 (en) 1978-07-06 1978-07-06 Atmosphere control method and device for direct-fired non-oxidizing heating furnace

Country Status (1)

Country Link
JP (1) JPS6032692B2 (en)

Also Published As

Publication number Publication date
JPS6032692B2 (en) 1985-07-30

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