JPS56102524A - Heat treatment of wire rod - Google Patents

Heat treatment of wire rod

Info

Publication number
JPS56102524A
JPS56102524A JP423980A JP423980A JPS56102524A JP S56102524 A JPS56102524 A JP S56102524A JP 423980 A JP423980 A JP 423980A JP 423980 A JP423980 A JP 423980A JP S56102524 A JPS56102524 A JP S56102524A
Authority
JP
Japan
Prior art keywords
wire rod
sec
temp
nitrate
stirring
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
JP423980A
Other languages
Japanese (ja)
Other versions
JPS6056215B2 (en
Inventor
Takafumi Yoshimura
Yoji Hida
Tadayoshi Kumagai
Masahiro Ariyoshi
Tomio Kawasaki
Kyoichiro Matsuoka
Hajime Shimazaki
Kenichi Yanagi
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.)
Mitsubishi Heavy Industries Ltd
Nippon Steel Corp
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd, Nippon Steel Corp filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP423980A priority Critical patent/JPS6056215B2/en
Publication of JPS56102524A publication Critical patent/JPS56102524A/en
Publication of JPS6056215B2 publication Critical patent/JPS6056215B2/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
    • C21D9/58—Continuous furnaces for strip or wire with heating by baths

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 a wire rod of uniform mixed structure of fine pearlite and proeutectoid ferrite, by heating the wire rod made of medium or high carbon steel at austenizing temp., then by cooling the wire rod in molten nitrate of K, Na etc. CONSTITUTION:A wire rod made of medium or high carbon steel contg. 0.20- 1.0% C is heated to the austenizing temp. of the steel before drawing. The heated wire rod is cooled uniformly in a bath contg. nitrate of Na, or K of low viscosity, low density, and low corrosive property, singly or in combination, melted by heating to 350-600 deg.C temp. while stirring the molten nitrate with a gas such as air blown into at >=0.05m/sec superficial velocity. The wire rod has a mixed structure of fine pearlite and a small quantity of proeutectoid ferrite, which is suitable for drawing. The superficial velocity V(m/sec) is defined to Q/A; the ratio of the quantity of blown air theta(m<3>/sec) time to cross sectional area A(m<2>) required for stirring.
JP423980A 1980-01-18 1980-01-18 Heat treatment method for wire rod Expired JPS6056215B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP423980A JPS6056215B2 (en) 1980-01-18 1980-01-18 Heat treatment method for wire rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP423980A JPS6056215B2 (en) 1980-01-18 1980-01-18 Heat treatment method for wire rod

Publications (2)

Publication Number Publication Date
JPS56102524A true JPS56102524A (en) 1981-08-17
JPS6056215B2 JPS6056215B2 (en) 1985-12-09

Family

ID=11578992

Family Applications (1)

Application Number Title Priority Date Filing Date
JP423980A Expired JPS6056215B2 (en) 1980-01-18 1980-01-18 Heat treatment method for wire rod

Country Status (1)

Country Link
JP (1) JPS6056215B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5578150A (en) * 1992-07-28 1996-11-26 Nippon Steel Corporation Heat treatment process for wire rods
EP2053682A1 (en) * 2006-08-14 2009-04-29 Toyo Seikan Kaisya, Ltd. Coil spring for fuel cell

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5578150A (en) * 1992-07-28 1996-11-26 Nippon Steel Corporation Heat treatment process for wire rods
EP2053682A1 (en) * 2006-08-14 2009-04-29 Toyo Seikan Kaisya, Ltd. Coil spring for fuel cell
EP2053682A4 (en) * 2006-08-14 2010-10-06 Toyo Seikan Kaisha Ltd Coil spring for fuel cell

Also Published As

Publication number Publication date
JPS6056215B2 (en) 1985-12-09

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