JPS55104430A - Production of cold rolled steel plate for good workability by short-time continuous annealing - Google Patents

Production of cold rolled steel plate for good workability by short-time continuous annealing

Info

Publication number
JPS55104430A
JPS55104430A JP1049279A JP1049279A JPS55104430A JP S55104430 A JPS55104430 A JP S55104430A JP 1049279 A JP1049279 A JP 1049279A JP 1049279 A JP1049279 A JP 1049279A JP S55104430 A JPS55104430 A JP S55104430A
Authority
JP
Japan
Prior art keywords
annealing
steel plate
time
sec
temperature
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.)
Granted
Application number
JP1049279A
Other languages
Japanese (ja)
Other versions
JPS5830934B2 (en
Inventor
Osamu Akisue
Teruaki Yamada
Mitsunobu Abe
Hideo Osone
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 JP54010492A priority Critical patent/JPS5830934B2/en
Priority to DE3003489A priority patent/DE3003489C2/en
Priority to IT19577/80A priority patent/IT1193903B/en
Priority to GB8003498A priority patent/GB2050419B/en
Priority to BR8000648A priority patent/BR8000648A/en
Priority to BE2/58382A priority patent/BE881490A/en
Priority to FR8002268A priority patent/FR2447969A1/en
Publication of JPS55104430A publication Critical patent/JPS55104430A/en
Publication of JPS5830934B2 publication Critical patent/JPS5830934B2/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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
    • C21D8/0473—Final recrystallisation annealing
    • 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
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0426—Hot rolling
    • 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

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 Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE: To considerably improve the workability of the steel plate through annealing of a short time by performing the subsequent continuous annealing under the specific contorlled conditions at the time of producing the low carbon steel plate through hot rolling and cold rolling.
CONSTITUTION: At the time of producing the low carbon steel sheet used for automotive bodies, etc. through hot rolling, cold rolling and annealing, its crystal grains are made as large as possible and carbides are precipitated at the grain boundaries to reduce the solid-solution C amount as far as possible in continuous annealing for improving its workability. To this end, it is rapidly heated at a heating rate of 40°C/sec in the range of 600° to annealing temperature during annealing. Here, it is so heated that the annealing temperature T°C becomes between 700°C to A3 transformation point and the annealing time t second becomes [10-0.03(T-680)]W [50-0.15(T-360)]. After the annealing, it is slow cooled at a cooling rate of 50°C/sec or less initially and it is rapidly cooled down to over aging temperature at 50°C/sec or more from the temperature TQ°C of 600°CW[T-0.027(T-680) (t1/2+23.7)]°C on the way, after which it is subjected to over aging treatment of 10secW2min at 300W500°C.
COPYRIGHT: (C)1980,JPO&Japio
JP54010492A 1979-02-02 1979-02-02 Manufacturing method of cold-rolled steel sheet with good formability by short-time continuous annealing Expired JPS5830934B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP54010492A JPS5830934B2 (en) 1979-02-02 1979-02-02 Manufacturing method of cold-rolled steel sheet with good formability by short-time continuous annealing
DE3003489A DE3003489C2 (en) 1979-02-02 1980-01-31 Process for the production of cold-rolled steel sheets
IT19577/80A IT1193903B (en) 1979-02-02 1980-01-31 PROCEDURE FOR PRODUCING COLD ROLLED STEEL TAPES, DEEP DEPTH OF FUTURE, BY CONTINUOUS ANNEALING OF SHORT LIFE
GB8003498A GB2050419B (en) 1979-02-02 1980-02-01 Continuous annealing process for producing cold rolled steel strips
BR8000648A BR8000648A (en) 1979-02-02 1980-02-01 PROCESS FOR THE PRODUCTION OF A COLD LAMINATED STEEL STRIP WITH EXCELLENT PROCESSABILITY, WITH CONTINUOUS SHORT-TIME RECOVERY
BE2/58382A BE881490A (en) 1979-02-02 1980-02-01 PROCESS FOR THE MANUFACTURE OF COLD ROLLED STEEL SHEETS FOR SHORT CONTINUOUS Deep Annealing
FR8002268A FR2447969A1 (en) 1979-02-02 1980-02-01 METHOD FOR MANUFACTURING COLD ROLLED STEEL STRIPS WITH DEEP STAMPING BY SHORT-TERM CONTINUOUS ANNEALING

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54010492A JPS5830934B2 (en) 1979-02-02 1979-02-02 Manufacturing method of cold-rolled steel sheet with good formability by short-time continuous annealing

Publications (2)

Publication Number Publication Date
JPS55104430A true JPS55104430A (en) 1980-08-09
JPS5830934B2 JPS5830934B2 (en) 1983-07-02

Family

ID=11751672

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54010492A Expired JPS5830934B2 (en) 1979-02-02 1979-02-02 Manufacturing method of cold-rolled steel sheet with good formability by short-time continuous annealing

Country Status (7)

Country Link
JP (1) JPS5830934B2 (en)
BE (1) BE881490A (en)
BR (1) BR8000648A (en)
DE (1) DE3003489C2 (en)
FR (1) FR2447969A1 (en)
GB (1) GB2050419B (en)
IT (1) IT1193903B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5857492B2 (en) * 1980-09-25 1983-12-20 新日本製鐵株式会社 Manufacturing method of high-strength cold-rolled steel sheet for automobiles
JPS5773132A (en) * 1980-10-24 1982-05-07 Nippon Kokan Kk <Nkk> Production of cold rolled mild steel plate of superior deep drawability and aging resistance by continuous annealing
US4410372A (en) * 1981-06-10 1983-10-18 Nippon Steel Corporation Process for producing deep-drawing, non-ageing, cold rolled steel strips having excellent paint bake-hardenability by continuous annealing
BE1012934A3 (en) * 1999-10-13 2001-06-05 Ct Rech Metallurgiques Asbl Manufacturing method of steel strip for cold rolled deep.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE846022A (en) * 1976-09-09 1977-03-09 PROCESS FOR MANUFACTURING SHEET FOR STAMPING

Also Published As

Publication number Publication date
DE3003489C2 (en) 1984-02-23
JPS5830934B2 (en) 1983-07-02
BE881490A (en) 1980-05-30
GB2050419B (en) 1982-11-24
FR2447969A1 (en) 1980-08-29
BR8000648A (en) 1980-10-14
IT8019577A0 (en) 1980-01-31
DE3003489A1 (en) 1980-08-14
IT1193903B (en) 1988-08-31
FR2447969B1 (en) 1984-06-15
GB2050419A (en) 1981-01-07

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