JPS57120622A - Heat treatment of pc steel bar or steel wire - Google Patents

Heat treatment of pc steel bar or steel wire

Info

Publication number
JPS57120622A
JPS57120622A JP592981A JP592981A JPS57120622A JP S57120622 A JPS57120622 A JP S57120622A JP 592981 A JP592981 A JP 592981A JP 592981 A JP592981 A JP 592981A JP S57120622 A JPS57120622 A JP S57120622A
Authority
JP
Japan
Prior art keywords
steel wire
steel
steel bar
temps
heat treatment
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
JP592981A
Other languages
Japanese (ja)
Inventor
Hiroshi Yada
Mitsuo Honda
Jiro Tominaga
Kyoichiro Matsuoka
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 JP592981A priority Critical patent/JPS57120622A/en
Publication of JPS57120622A publication Critical patent/JPS57120622A/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

Abstract

PURPOSE:To improve uniform elongation markedly without degrading strength by quickly cooling a PC steel bar or steel wire contg. specific ratios of C, Si, Mn, Cr down to specific temps. and holding the same at these temp. until bainite transformation ends. CONSTITUTION:A PC steel bar or steel wire contg. 0.30-0.80% C, 0.50-2.00% Si, 0.3-2.00% Mn, and 0.30-2.00% Cr as essential components is quickly cooled from an austenite area to temps. above the martensite formation temp. and <= 550 deg.C. Here, the rate of quick cooling is set about >=20 deg.C/sec. After the quick cooling, it is held in the bainite area above the Ms point until bainite structure is completed, and <=550 deg.C is preferable. It is then cooled as it is or, further it is tempered. In the case of increasing deoxidation, strength and toughness, 1 or >=2 kinds of Al, Mo, Ni, V, Nb, Ta, Ti, B are contained at about 0.01-0.50%.
JP592981A 1981-01-20 1981-01-20 Heat treatment of pc steel bar or steel wire Pending JPS57120622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP592981A JPS57120622A (en) 1981-01-20 1981-01-20 Heat treatment of pc steel bar or steel wire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP592981A JPS57120622A (en) 1981-01-20 1981-01-20 Heat treatment of pc steel bar or steel wire

Publications (1)

Publication Number Publication Date
JPS57120622A true JPS57120622A (en) 1982-07-27

Family

ID=11624575

Family Applications (1)

Application Number Title Priority Date Filing Date
JP592981A Pending JPS57120622A (en) 1981-01-20 1981-01-20 Heat treatment of pc steel bar or steel wire

Country Status (1)

Country Link
JP (1) JPS57120622A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63121621A (en) * 1986-11-11 1988-05-25 Nisshin Steel Co Ltd Production of bainite steel sheet having excellent spring characteristic
JPH0659795U (en) * 1993-01-21 1994-08-19 有限会社ミナリ Electric infrared heating device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5351121A (en) * 1976-10-20 1978-05-10 Sumitomo Metal Ind Ltd Production of medium or low carbn high tensile wire rod

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5351121A (en) * 1976-10-20 1978-05-10 Sumitomo Metal Ind Ltd Production of medium or low carbn high tensile wire rod

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63121621A (en) * 1986-11-11 1988-05-25 Nisshin Steel Co Ltd Production of bainite steel sheet having excellent spring characteristic
JPH0659795U (en) * 1993-01-21 1994-08-19 有限会社ミナリ Electric infrared heating device

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