JPS566703A - Hot rolling method for steel billet - Google Patents

Hot rolling method for steel billet

Info

Publication number
JPS566703A
JPS566703A JP8075579A JP8075579A JPS566703A JP S566703 A JPS566703 A JP S566703A JP 8075579 A JP8075579 A JP 8075579A JP 8075579 A JP8075579 A JP 8075579A JP S566703 A JPS566703 A JP S566703A
Authority
JP
Japan
Prior art keywords
steel billet
cracks
hot rolling
specified
spheroidization
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
JP8075579A
Other languages
Japanese (ja)
Inventor
Fujio Fujisawa
Shigeru Hayano
Kazuaki Ezaka
Shigenori Tanaka
Hiroo Suzuki
Kazuo Watanabe
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 JP8075579A priority Critical patent/JPS566703A/en
Publication of JPS566703A publication Critical patent/JPS566703A/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
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets

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)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)

Abstract

PURPOSE:To prevent generation of surface cracks and internal cracks, by continuing the slow cooling at the specified cooling rate from the melting and solidification of the metal till arriving at the just front of the warming zone, and following to this, by carrying out the hot rolling pass for the steel billet after it is warmed at the specified temperature range for the specified period of time. CONSTITUTION:The steel billet is moderately slow cooled at the rate of <=1 deg.C/ sec from the melting and solidification of the metal till arriving at the just front of the warming zone, in order to promote the spheroidization of the sheet type precipitations; following to this, the billet is warmed at the temperature region regulated to 950-1,300 deg.C for at least 10min for further promoting the spheroidization; after that, this steel billet is hot rolled; hereby, the generation of rolling cracks is restricted.
JP8075579A 1979-06-28 1979-06-28 Hot rolling method for steel billet Pending JPS566703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8075579A JPS566703A (en) 1979-06-28 1979-06-28 Hot rolling method for steel billet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8075579A JPS566703A (en) 1979-06-28 1979-06-28 Hot rolling method for steel billet

Publications (1)

Publication Number Publication Date
JPS566703A true JPS566703A (en) 1981-01-23

Family

ID=13727217

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8075579A Pending JPS566703A (en) 1979-06-28 1979-06-28 Hot rolling method for steel billet

Country Status (1)

Country Link
JP (1) JPS566703A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954453A (en) * 1982-09-21 1984-03-29 Nippon Steel Corp Continuous casting method of steel
JPS60166150A (en) * 1984-02-10 1985-08-29 Nippon Steel Corp Continuous casting method of steel
JPS62187545A (en) * 1986-02-12 1987-08-15 Sumitomo Metal Ind Ltd Production of high-toughness non-tempered steel
JPS62212001A (en) * 1986-03-13 1987-09-18 Sumitomo Metal Ind Ltd Hot rolling method for preventing surface cracking of ingot
JPS62212002A (en) * 1986-03-13 1987-09-18 Sumitomo Metal Ind Ltd Hot rolling method for preventing surface cracking of ingot
JPS63235432A (en) * 1987-03-25 1988-09-30 Nippon Steel Corp Manufacture of ti-containing hot-rolled steel plate combining high strength with high toughness

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52105520A (en) * 1976-03-02 1977-09-05 Nippon Steel Corp Continuous casting and continuous hot rolling of aluminium-killed stee l

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52105520A (en) * 1976-03-02 1977-09-05 Nippon Steel Corp Continuous casting and continuous hot rolling of aluminium-killed stee l

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954453A (en) * 1982-09-21 1984-03-29 Nippon Steel Corp Continuous casting method of steel
JPS60166150A (en) * 1984-02-10 1985-08-29 Nippon Steel Corp Continuous casting method of steel
JPH0245536B2 (en) * 1984-02-10 1990-10-09 Nippon Steel Corp
JPS62187545A (en) * 1986-02-12 1987-08-15 Sumitomo Metal Ind Ltd Production of high-toughness non-tempered steel
JPS62212001A (en) * 1986-03-13 1987-09-18 Sumitomo Metal Ind Ltd Hot rolling method for preventing surface cracking of ingot
JPS62212002A (en) * 1986-03-13 1987-09-18 Sumitomo Metal Ind Ltd Hot rolling method for preventing surface cracking of ingot
JPS63235432A (en) * 1987-03-25 1988-09-30 Nippon Steel Corp Manufacture of ti-containing hot-rolled steel plate combining high strength with high toughness

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