JPS5763638A - Production of wire rod for cold forging - Google Patents

Production of wire rod for cold forging

Info

Publication number
JPS5763638A
JPS5763638A JP13157980A JP13157980A JPS5763638A JP S5763638 A JPS5763638 A JP S5763638A JP 13157980 A JP13157980 A JP 13157980A JP 13157980 A JP13157980 A JP 13157980A JP S5763638 A JPS5763638 A JP S5763638A
Authority
JP
Japan
Prior art keywords
annealing
scale
decarbonization
limited
inert gas
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.)
Pending
Application number
JP13157980A
Other languages
Japanese (ja)
Inventor
Saburo Otani
Toshimichi Mori
Soichi Izumi
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 JP13157980A priority Critical patent/JPS5763638A/en
Priority to US06/212,223 priority patent/US4375378A/en
Priority to DE8080107734T priority patent/DE3071605D1/en
Priority to EP80107734A priority patent/EP0030699B1/en
Priority to KR1019800004651A priority patent/KR850000595B1/en
Publication of JPS5763638A publication Critical patent/JPS5763638A/en
Pending 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
    • C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods

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 produce wire rods of less decarbonized layers in steel surface and superior cold forgiability with a good productivity by annealing the hot-rolled wire rods made into quench structure in an inert gas while they are held stuck with scale. CONSTITUTION:The hot-rolled wire rods stuck with scale of 3-10mu thickness by cooling the same at >=4 deg.C/sec rate down to 600 deg.C to quench structure after hot rolling are subjected to spheroidizing annealing in an inert gas of <=0.05% moisture. Here, the cooling conditions are limited in order to form the quench structure and shorten the spheroidizing annealing time. The scale thickness below 3mu is insufficient in the effect of preventing the progression of decarbonization during annealing and that above 10mu increases the danger of peeling during handling up to annealing. The gaseous atmosphere for the spheroidizing annealing is limited because with a reducing gas the scale reacts to produce decarbonizable gases and with an oxidative gas, the decarbonization and oxidation progress simultaneously. The moisture in the inert gas is limited in order to prevent the considerable progression of decarbonization.
JP13157980A 1979-12-07 1980-09-24 Production of wire rod for cold forging Pending JPS5763638A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP13157980A JPS5763638A (en) 1980-09-24 1980-09-24 Production of wire rod for cold forging
US06/212,223 US4375378A (en) 1979-12-07 1980-12-02 Process for producing spheroidized wire rod
DE8080107734T DE3071605D1 (en) 1979-12-07 1980-12-05 Process for producing a wire rod for cold forging
EP80107734A EP0030699B1 (en) 1979-12-07 1980-12-05 Process for producing a wire rod for cold forging
KR1019800004651A KR850000595B1 (en) 1979-12-07 1980-12-06 How to Nodify Liner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13157980A JPS5763638A (en) 1980-09-24 1980-09-24 Production of wire rod for cold forging

Publications (1)

Publication Number Publication Date
JPS5763638A true JPS5763638A (en) 1982-04-17

Family

ID=15061344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13157980A Pending JPS5763638A (en) 1979-12-07 1980-09-24 Production of wire rod for cold forging

Country Status (1)

Country Link
JP (1) JPS5763638A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6602359B1 (en) 1999-12-24 2003-08-05 Nippon Steel Corporation Bar or wire product for use in cold forging and method for producing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6602359B1 (en) 1999-12-24 2003-08-05 Nippon Steel Corporation Bar or wire product for use in cold forging and method for producing the same

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