GB1117322A - Process for producing extremely low carbon thin iron sheet - Google Patents

Process for producing extremely low carbon thin iron sheet

Info

Publication number
GB1117322A
GB1117322A GB2788165A GB2788165A GB1117322A GB 1117322 A GB1117322 A GB 1117322A GB 2788165 A GB2788165 A GB 2788165A GB 2788165 A GB2788165 A GB 2788165A GB 1117322 A GB1117322 A GB 1117322A
Authority
GB
United Kingdom
Prior art keywords
strip
cold
rolling
low carbon
subjecting
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.)
Expired
Application number
GB2788165A
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.)
Yawata Iron and Steel Co Ltd
Original Assignee
Yawata Iron and Steel Co 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 Yawata Iron and Steel Co Ltd filed Critical Yawata Iron and Steel Co Ltd
Publication of GB1117322A publication Critical patent/GB1117322A/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
    • C21D8/0421—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
    • C21D8/0436—Cold rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D5/00—Coating with enamels or vitreous layers
    • 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
    • C21D8/0468—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 between cold rolling steps
    • 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

Landscapes

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

Abstract

An extremely low carbon thin iron sheet suitable for deep drawing, one-coat enamelling or electro-magnetic use is made by producing a hot rolled steel strip, cold-rolling this strip with a reduction ratio of 40-95% to form a cold-rolled low carbon steel strip having a thickness of 0.5-2.0 mm and a carbon content of less than 0.12%; subjecting this strip, in the form of an open coil, to a first recrystallization annealing including decarburization to form a low carbon iron strip containing less than 0.02%C; subjecting this strip to a second cold-rolling with a reduction ratio of 40-95%; subjecting the iron strip to a second recrystallization annealing after the second cold-rolling and finally subjecting the strip to temper rolling with a reduction ratio of 0.5-2.0%. The strip may be electrolytically cleaned after each cold-rolling. The annealing-decarburization process is carried out in an atmosphere of hydrogen, nitrogen and steam at a temperature of 600-900 DEG C. for 5-40 hours. The second recrystallization annealing is carried out in an atmosphere comprising (a) 5% CO2, 10.5 CO, 12.5% H2, 0.5% CH4, 70.7% N2 and 0.8% H2O or (b) 0.05% CO2, 0.05% CO, 5% H2 the rest being N2, at a temperature of 600-700 DEG C. for less than 4 hours. To render the iron non-ageing it may contain 0.003-0.02% of boron or 0.02-0.05% of vanadium.
GB2788165A 1964-07-01 1965-07-01 Process for producing extremely low carbon thin iron sheet Expired GB1117322A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3815064 1964-07-01

Publications (1)

Publication Number Publication Date
GB1117322A true GB1117322A (en) 1968-06-19

Family

ID=12517373

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2788165A Expired GB1117322A (en) 1964-07-01 1965-07-01 Process for producing extremely low carbon thin iron sheet

Country Status (1)

Country Link
GB (1) GB1117322A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3853636A (en) * 1968-11-14 1974-12-10 Nippon Kokan Kk Method for manufacturing cold rolled steel excellent in press-formability
EP0672758A1 (en) * 1994-02-17 1995-09-20 Kawasaki Steel Corporation Method of manufacturing canning steel sheet with non-aging property and superior workability
CN107119175A (en) * 2017-07-04 2017-09-01 合肥市大卓电力有限责任公司 A kind of annealing process of low-carbon cold rolling steel plate

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3853636A (en) * 1968-11-14 1974-12-10 Nippon Kokan Kk Method for manufacturing cold rolled steel excellent in press-formability
EP0672758A1 (en) * 1994-02-17 1995-09-20 Kawasaki Steel Corporation Method of manufacturing canning steel sheet with non-aging property and superior workability
US5587027A (en) * 1994-02-17 1996-12-24 Kawasaki Steel Corporation Method of manufacturing canning steel sheet with non-aging property and superior workability
CN1049927C (en) * 1994-02-17 2000-03-01 川崎制铁株式会社 Method for making steel plate with good working performence
CN107119175A (en) * 2017-07-04 2017-09-01 合肥市大卓电力有限责任公司 A kind of annealing process of low-carbon cold rolling steel plate

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