JPS5651531A - Production of zinc hot dipped steel plate of superior drawability - Google Patents

Production of zinc hot dipped steel plate of superior drawability

Info

Publication number
JPS5651531A
JPS5651531A JP12583679A JP12583679A JPS5651531A JP S5651531 A JPS5651531 A JP S5651531A JP 12583679 A JP12583679 A JP 12583679A JP 12583679 A JP12583679 A JP 12583679A JP S5651531 A JPS5651531 A JP S5651531A
Authority
JP
Japan
Prior art keywords
aging treatment
over
over aging
temperature
steel plate
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
JP12583679A
Other languages
Japanese (ja)
Inventor
Takayoshi Shimomura
Koichi Osawa
Masayuki Kinoshita
Yoshikazu Fukuoka
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP12583679A priority Critical patent/JPS5651531A/en
Publication of JPS5651531A publication Critical patent/JPS5651531A/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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets

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)
  • Coating With Molten Metal (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

PURPOSE:To produce a Zn hot dipped steel plate of superior drawability by heating a cold rolled low carbon steel strip to above its recrystallization temperature, and soaking the same at this temperature then quickly cooling the same at the specific cooling rates and Zn hot dipping the strip before or after the over-aging treatment. CONSTITUTION:A cold rolled steel strip of low carbon steel is annealed by being heated to above its recrystallization temperature and is soaked at this temprature, after which it is quenched down to 300-500 deg.C temperatures at cooling rates of >=70 deg.C/sec. with water-cooled type rotators. The solid solubilized carbon amount before over aging treatment is increased by this quick cooling. It is then subjected to over aging treatment by being held for more than 10sec within a 300-500 deg.C temperature range to accelerate the deposition of solid solubilized carbon and obtain over aging treatment effect within a short time. Zinc hot dipping is performed before or after the over aging treatment. In the case of galvanizing before the over aging treatment, the over aging treatment temperature is made 300-400 deg.C, and in the case of performing the galvanizing after the over aging treatment, the over aging treatment temperature is made 460-500 deg.C.
JP12583679A 1979-09-29 1979-09-29 Production of zinc hot dipped steel plate of superior drawability Pending JPS5651531A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12583679A JPS5651531A (en) 1979-09-29 1979-09-29 Production of zinc hot dipped steel plate of superior drawability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12583679A JPS5651531A (en) 1979-09-29 1979-09-29 Production of zinc hot dipped steel plate of superior drawability

Publications (1)

Publication Number Publication Date
JPS5651531A true JPS5651531A (en) 1981-05-09

Family

ID=14920134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12583679A Pending JPS5651531A (en) 1979-09-29 1979-09-29 Production of zinc hot dipped steel plate of superior drawability

Country Status (1)

Country Link
JP (1) JPS5651531A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5074924A (en) * 1989-06-21 1991-12-24 Nippon Steel Corporation Process for producing galvanized, non-aging cold rolled steel sheets having good formability in a continuous galvanizing line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5074924A (en) * 1989-06-21 1991-12-24 Nippon Steel Corporation Process for producing galvanized, non-aging cold rolled steel sheets having good formability in a continuous galvanizing line

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