GB1207462A - Method for heat treating steel wire rod - Google Patents

Method for heat treating steel wire rod

Info

Publication number
GB1207462A
GB1207462A GB3090968A GB3090968A GB1207462A GB 1207462 A GB1207462 A GB 1207462A GB 3090968 A GB3090968 A GB 3090968A GB 3090968 A GB3090968 A GB 3090968A GB 1207462 A GB1207462 A GB 1207462A
Authority
GB
United Kingdom
Prior art keywords
rod
temperature
zone
cooling
steel wire
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.)
Expired
Application number
GB3090968A
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.)
Schloemann AG
Original Assignee
Schloemann AG
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
Priority claimed from DE1583411A external-priority patent/DE1583411C2/en
Application filed by Schloemann AG filed Critical Schloemann AG
Publication of GB1207462A publication Critical patent/GB1207462A/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
    • C21D9/525—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
    • 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
    • C21D9/5732—Continuous furnaces for strip or wire with cooling of wires; of rods

Abstract

1,207,462. Cooling steel wire. SCHLOEMANN A.G. July 10, 1968 [July 12, 1967], No.30909/68. Heading C7N. Hot, patentable steel rod leaving the last stand of a rod mill is surface quenched to about 70‹ C. above the martensite transformation temperature in each of a number of successive quenching stages, the surface being allowed to reheat after each quenching stage by conduction from the centre zone of the rod, so that the rod enters the pearlite transformation zone while temperature compensation is still occurring and with an average temperature of 600-650‹ C., the temperature of the rod surface being raised above the upper bainite temperature before transformation begins. The rod is reeled when a substantial peripheral zone thereof is transformed to pearlite. The apparatus may comprise a series of at least three cooling units, water and air coolers being arranged alternately, the cooling effect of the water coolers decreasing in the direction of rod travel according to a logarithmic decay and the air coolers increasing in length according to a logarithmically increasing series, the overall length of the cooling units being equal to the product of the rod speed and a time of 0À6 to 0À7 seconds.
GB3090968A 1967-07-12 1968-07-10 Method for heat treating steel wire rod Expired GB1207462A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1583411A DE1583411C2 (en) 1967-07-12 1967-07-12 Process for the heat treatment of steel wire

Publications (1)

Publication Number Publication Date
GB1207462A true GB1207462A (en) 1970-10-07

Family

ID=5679493

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3090968A Expired GB1207462A (en) 1967-07-12 1968-07-10 Method for heat treating steel wire rod

Country Status (2)

Country Link
FR (1) FR1573544A (en)
GB (1) GB1207462A (en)

Also Published As

Publication number Publication date
FR1573544A (en) 1969-07-04

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Legal Events

Date Code Title Description
PS Patent sealed
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429D Case decided by the comptroller ** specification amended (sect. 29/1949)
SPA Amended specification published
PLNP Patent lapsed through nonpayment of renewal fees