JPS56150136A - Cooling method for hot rolled wire rod - Google Patents

Cooling method for hot rolled wire rod

Info

Publication number
JPS56150136A
JPS56150136A JP5362580A JP5362580A JPS56150136A JP S56150136 A JPS56150136 A JP S56150136A JP 5362580 A JP5362580 A JP 5362580A JP 5362580 A JP5362580 A JP 5362580A JP S56150136 A JPS56150136 A JP S56150136A
Authority
JP
Japan
Prior art keywords
wire rod
hot rolled
cooled
temperature
mechanical properties
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
JP5362580A
Other languages
Japanese (ja)
Inventor
Takafumi Yoshimura
Yoji Hida
Tadayoshi Kumagai
Katsura Tsuchiya
Masaya Tsutsumi
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 JP5362580A priority Critical patent/JPS56150136A/en
Publication of JPS56150136A publication Critical patent/JPS56150136A/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
    • C21D9/54—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
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
    • C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching

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 avoid overcooling the surface of a wire rod and obtain a wire rod having mechanical properties similar to those of a lead-patened material by a method wherein a hot rolled wire rod of medium- or high-carbon steel is cooled rapidly under specified conditions and then cooled with an inorganic heat-insulating material adhered thereto. CONSTITUTION:Steel containing 0.25-1.0% of C, not more than 1.5% of Mn and the like is hot rolled into the wire rod, which is then cooled rapidly from an austenite temperature range to a temperature ranging from a temperature slightly higher than Ms point to 650 deg.C, at cooling rate of not less than 20 deg.C/sec. Then, the heat- insulating material consisting mainly of an inorganic white powder such as Al2O3 or one containing pulverulent Al and an igniter as main constituents is adhered to the surface of the wire rod, and the latter is cooled while preventing the surface from being overcooled. Accordingly, martensite or the like is prevented from being generated at the surface layer, while the temperature of the wire rod is equalized in the longitudinal direction, so that a wire rod excellent in mechanical properties can be obtained.
JP5362580A 1980-04-24 1980-04-24 Cooling method for hot rolled wire rod Pending JPS56150136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5362580A JPS56150136A (en) 1980-04-24 1980-04-24 Cooling method for hot rolled wire rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5362580A JPS56150136A (en) 1980-04-24 1980-04-24 Cooling method for hot rolled wire rod

Publications (1)

Publication Number Publication Date
JPS56150136A true JPS56150136A (en) 1981-11-20

Family

ID=12948083

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5362580A Pending JPS56150136A (en) 1980-04-24 1980-04-24 Cooling method for hot rolled wire rod

Country Status (1)

Country Link
JP (1) JPS56150136A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100415902C (en) * 2006-08-03 2008-09-03 上海交通大学 Method of improving steel object surface hardness using carbon distribution
CN108265163A (en) * 2018-01-26 2018-07-10 贵州钢绳股份有限公司 A kind of patenting coverture and its application in Steel Wire Heat Treatment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100415902C (en) * 2006-08-03 2008-09-03 上海交通大学 Method of improving steel object surface hardness using carbon distribution
CN108265163A (en) * 2018-01-26 2018-07-10 贵州钢绳股份有限公司 A kind of patenting coverture and its application in Steel Wire Heat Treatment

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