JPS57198211A - Manufacture of heat treat pc steel rod - Google Patents

Manufacture of heat treat pc steel rod

Info

Publication number
JPS57198211A
JPS57198211A JP8318381A JP8318381A JPS57198211A JP S57198211 A JPS57198211 A JP S57198211A JP 8318381 A JP8318381 A JP 8318381A JP 8318381 A JP8318381 A JP 8318381A JP S57198211 A JPS57198211 A JP S57198211A
Authority
JP
Japan
Prior art keywords
working
wire rod
heating
rod
steel
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
JP8318381A
Other languages
Japanese (ja)
Inventor
Meikai Imaide
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP8318381A priority Critical patent/JPS57198211A/en
Publication of JPS57198211A publication Critical patent/JPS57198211A/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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires

Abstract

PURPOSE:To manufacture a high tension PC steel rod or steel wire which is excellent in the delayed fracture resistance performance, by working a steel rod or a steel wire of martensite structure in hot working, and tempering it, in case of its drawing working and deforming working. CONSTITUTION:A wire rod 1 of martensite structure whose carbon content is <=0.4wt.% is heated continuously and quickly at a temperature rise speed exceeding 50 deg.C/second up to 250-600 deg.C of a tempering temperature, by high frequency induction heating or direct electrification heating, in a heating device 2. Said heat treatment is controlled, by measuring a surface temperature of the wire rod 1 with a thermometer 6. The wire rod 1 is led to a hot working device 3 within 10 seconds after heating, plastic working is performed within a range of 5-30% by a die or a roll, its heat is retained to a tempering temperature about 1 minute or less by a heat retaining furnace 4, and after that, it is forcibly cooled in a water-cooling. The wire rod is drawn out, putting tensile force on the wire rod 1 between said hot working device 3 and a drawing capstan 7.
JP8318381A 1981-05-29 1981-05-29 Manufacture of heat treat pc steel rod Pending JPS57198211A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8318381A JPS57198211A (en) 1981-05-29 1981-05-29 Manufacture of heat treat pc steel rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8318381A JPS57198211A (en) 1981-05-29 1981-05-29 Manufacture of heat treat pc steel rod

Publications (1)

Publication Number Publication Date
JPS57198211A true JPS57198211A (en) 1982-12-04

Family

ID=13795191

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8318381A Pending JPS57198211A (en) 1981-05-29 1981-05-29 Manufacture of heat treat pc steel rod

Country Status (1)

Country Link
JP (1) JPS57198211A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS581016A (en) * 1981-06-26 1983-01-06 High Frequency Heattreat Co Ltd Production of steel bar of steel wire having superior delayed breakdown characteristic and mechanical properties for prestressed concrete
EP0199715A2 (en) * 1985-04-26 1986-10-29 Austria Draht Gesellschaft m.b.H. Process for manufacturing steel wire
JPS62136520A (en) * 1985-12-09 1987-06-19 Sumitomo Metal Ind Ltd Production of high tensile steel wire having excellent delayed cracking resistant characteristic
JPH0456728A (en) * 1990-06-27 1992-02-24 Kawatetsu Techno Wire Kk Production of low relaxation pc steel material
CN113462869A (en) * 2021-07-22 2021-10-01 南京宝日钢丝制品有限公司 Treatment method of heat-resistant alloy cold-heading steel wire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5782431A (en) * 1980-11-08 1982-05-22 Sumitomo Metal Ind Ltd Production of high tension wire rod
JPS5782423A (en) * 1980-11-08 1982-05-22 Sumitomo Metal Ind Ltd Production of high tensile wire
JPS5782422A (en) * 1980-11-08 1982-05-22 Sumitomo Metal Ind Ltd Production of high tension wire
JPS57169020A (en) * 1981-04-11 1982-10-18 Sumitomo Metal Ind Ltd Production of high tensile steel bar

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5782431A (en) * 1980-11-08 1982-05-22 Sumitomo Metal Ind Ltd Production of high tension wire rod
JPS5782423A (en) * 1980-11-08 1982-05-22 Sumitomo Metal Ind Ltd Production of high tensile wire
JPS5782422A (en) * 1980-11-08 1982-05-22 Sumitomo Metal Ind Ltd Production of high tension wire
JPS57169020A (en) * 1981-04-11 1982-10-18 Sumitomo Metal Ind Ltd Production of high tensile steel bar

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS581016A (en) * 1981-06-26 1983-01-06 High Frequency Heattreat Co Ltd Production of steel bar of steel wire having superior delayed breakdown characteristic and mechanical properties for prestressed concrete
JPH0227419B2 (en) * 1981-06-26 1990-06-18 Koshuha Netsuren Kk
EP0199715A2 (en) * 1985-04-26 1986-10-29 Austria Draht Gesellschaft m.b.H. Process for manufacturing steel wire
EP0199715A3 (en) * 1985-04-26 1987-09-30 Austria Draht Gesellschaft m.b.H. Process for manufacturing steel wire
JPS62136520A (en) * 1985-12-09 1987-06-19 Sumitomo Metal Ind Ltd Production of high tensile steel wire having excellent delayed cracking resistant characteristic
JPH0559967B2 (en) * 1985-12-09 1993-09-01 Sumitomo Metal Ind
JPH0456728A (en) * 1990-06-27 1992-02-24 Kawatetsu Techno Wire Kk Production of low relaxation pc steel material
JPH079038B2 (en) * 1990-06-27 1995-02-01 川鉄テクノワイヤ株式会社 Low relaxation PC steel manufacturing method
CN113462869A (en) * 2021-07-22 2021-10-01 南京宝日钢丝制品有限公司 Treatment method of heat-resistant alloy cold-heading steel wire

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