JPS54162614A - Continuously water hardening and annealing method - Google Patents

Continuously water hardening and annealing method

Info

Publication number
JPS54162614A
JPS54162614A JP7150478A JP7150478A JPS54162614A JP S54162614 A JPS54162614 A JP S54162614A JP 7150478 A JP7150478 A JP 7150478A JP 7150478 A JP7150478 A JP 7150478A JP S54162614 A JPS54162614 A JP S54162614A
Authority
JP
Japan
Prior art keywords
temp
strip
controller
water
warm water
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
JP7150478A
Other languages
Japanese (ja)
Other versions
JPS5944367B2 (en
Inventor
Kenji Araki
Masaki Omura
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 JP7150478A priority Critical patent/JPS5944367B2/en
Publication of JPS54162614A publication Critical patent/JPS54162614A/en
Publication of JPS5944367B2 publication Critical patent/JPS5944367B2/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
    • C21D9/573—Continuous furnaces for strip or wire with cooling

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 Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE:To reduce energy consumption and equipment cost for continuous water hardening and annealing by cooling a heated low carbon steel strip to a predetermined cooling start temp. followed by water hardening, overaging at a specified temp. and cooling to room temp. CONSTITUTION:Steel strip 1 is heated to about 700 deg.C and passed through tank 2 filled with warm water of above 40 deg.C at a running speed of 60-500 m/min to cool and harden strip 1. The temp. of strip 1 is measured with thermometer 5 and fed back to controller 4. The temp. of the warm water in tank 2 is measured with thermometer 5 and inputted into controller 4. The temps. are compared in controller 4, and pumps 6, 7 are driven to inject cold water or drain warm water so that the temp. of strip 1 is regulated to a quenching end point of 230-500 deg.C. Strip 1 is overaged at 230-500 deg.C for 0.5-5 min and cooled to room temp. Thus, reheating equipment and energy for overaging are made unnecessary.
JP7150478A 1978-06-15 1978-06-15 Water quenching continuous annealing method Expired JPS5944367B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7150478A JPS5944367B2 (en) 1978-06-15 1978-06-15 Water quenching continuous annealing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7150478A JPS5944367B2 (en) 1978-06-15 1978-06-15 Water quenching continuous annealing method

Publications (2)

Publication Number Publication Date
JPS54162614A true JPS54162614A (en) 1979-12-24
JPS5944367B2 JPS5944367B2 (en) 1984-10-29

Family

ID=13462567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7150478A Expired JPS5944367B2 (en) 1978-06-15 1978-06-15 Water quenching continuous annealing method

Country Status (1)

Country Link
JP (1) JPS5944367B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195658A2 (en) * 1985-03-22 1986-09-24 Kawasaki Steel Corporation Method and apparatus of cooling steel strip
EP0195659A2 (en) * 1985-03-22 1986-09-24 Kawasaki Steel Corporation Method and apparatus of cooling steel strip in continuous heat treating line
EP0210847A2 (en) * 1985-07-25 1987-02-04 Kawasaki Steel Corporation Method and apparatus for cooling steel strips
KR20170091549A (en) * 2017-07-28 2017-08-09 주식회사 포스코 Method and apparatus for manufacturing steel sheet having martensite phase
JP2019505667A (en) * 2015-12-21 2019-02-28 ポスコＰｏｓｃｏ Method and apparatus for producing martensitic steel sheet

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195658A2 (en) * 1985-03-22 1986-09-24 Kawasaki Steel Corporation Method and apparatus of cooling steel strip
EP0195659A2 (en) * 1985-03-22 1986-09-24 Kawasaki Steel Corporation Method and apparatus of cooling steel strip in continuous heat treating line
EP0210847A2 (en) * 1985-07-25 1987-02-04 Kawasaki Steel Corporation Method and apparatus for cooling steel strips
EP0210847A3 (en) * 1985-07-25 1989-05-10 Kawasaki Steel Corporation Method and apparatus for cooling steel strips
JP2019505667A (en) * 2015-12-21 2019-02-28 ポスコＰｏｓｃｏ Method and apparatus for producing martensitic steel sheet
KR20170091549A (en) * 2017-07-28 2017-08-09 주식회사 포스코 Method and apparatus for manufacturing steel sheet having martensite phase

Also Published As

Publication number Publication date
JPS5944367B2 (en) 1984-10-29

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