JPS54161568A - Manufacture of rod - Google Patents

Manufacture of rod

Info

Publication number
JPS54161568A
JPS54161568A JP7164678A JP7164678A JPS54161568A JP S54161568 A JPS54161568 A JP S54161568A JP 7164678 A JP7164678 A JP 7164678A JP 7164678 A JP7164678 A JP 7164678A JP S54161568 A JPS54161568 A JP S54161568A
Authority
JP
Japan
Prior art keywords
rod
temperature range
specified
minutes
scale
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
JP7164678A
Other languages
Japanese (ja)
Inventor
Fumio Matsuno
Takeo Harada
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
Sumitomo Metal 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 Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP7164678A priority Critical patent/JPS54161568A/en
Publication of JPS54161568A publication Critical patent/JPS54161568A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

PURPOSE:To manufacture the rod provided with good mechanical descaling property, by cooling the rod of specified diameter to a specified temperature range within 10 seconds after the end of finish rolling, and after that, by maintaining the rod at a specified temperature range for 1-5 minutes. CONSTITUTION:The rod L, delivered from the hot rolling mill 1, is cooled to the temperature range 850-750 deg.C within 10 seconds after the end of rolling work, while the rod L is passing through the water cooling type coolers 2, 3. After that, the rod L is wound into a coil, and is maintained at the temperature range 850- 750 deg.C for 1-5 minutes (preferably 2-3 minutes); hereby, the generation of so called scale bulging phenomenon is prevented, and the amount of generated thin scale is rduced, so that the rod L with good mechanical descaling property can be manufactured. This method is suitable for the rod of diameter 5.5-10mm; the important point of this method is that the rod is maintained within the region other than the scale bulging region, that is the obliquely hatched regions A, B, in the correlation diagram for the rod surface temperature and the time elapsed after the end of rolling work, for a specified time. In case of the rod of large diameter, the preliminary cooling is carried out before the finish rolling mill.
JP7164678A 1978-06-13 1978-06-13 Manufacture of rod Pending JPS54161568A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7164678A JPS54161568A (en) 1978-06-13 1978-06-13 Manufacture of rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7164678A JPS54161568A (en) 1978-06-13 1978-06-13 Manufacture of rod

Publications (1)

Publication Number Publication Date
JPS54161568A true JPS54161568A (en) 1979-12-21

Family

ID=13466590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7164678A Pending JPS54161568A (en) 1978-06-13 1978-06-13 Manufacture of rod

Country Status (1)

Country Link
JP (1) JPS54161568A (en)

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