EP0181583A3 - Method of making a dual-phase hot-rolled steel strip - Google Patents

Method of making a dual-phase hot-rolled steel strip Download PDF

Info

Publication number
EP0181583A3
EP0181583A3 EP85113944A EP85113944A EP0181583A3 EP 0181583 A3 EP0181583 A3 EP 0181583A3 EP 85113944 A EP85113944 A EP 85113944A EP 85113944 A EP85113944 A EP 85113944A EP 0181583 A3 EP0181583 A3 EP 0181583A3
Authority
EP
European Patent Office
Prior art keywords
temperature
hot
dual
slab
rolling
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
EP85113944A
Other languages
German (de)
Other versions
EP0181583A2 (en
EP0181583B1 (en
Inventor
Olaf Maid
Lutz Dr. Meyer
Antonio Massip
Wolfgang Dr. Muschenborn
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.)
Thyssen Stahl AG
Original Assignee
Thyssen Stahl AG
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 Thyssen Stahl AG filed Critical Thyssen Stahl AG
Priority to AT85113944T priority Critical patent/ATE60624T1/en
Publication of EP0181583A2 publication Critical patent/EP0181583A2/en
Publication of EP0181583A3 publication Critical patent/EP0181583A3/en
Application granted granted Critical
Publication of EP0181583B1 publication Critical patent/EP0181583B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Steel (AREA)
  • Networks Using Active Elements (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

The invention relates to a method of producing hot-rolled strip having a dual-phase structure from a slab previously produced by ingot casting or continuous casting. The slab contains carbon, manganese, silicon and chromium as essential constituents in addition to iron. The slab is heated up to the rolling temperature, hot-rolled at a temperature above Ar3, rapidly cooled from the rolling temperature and coiled at a relative low temperature. The characterizing features of the invention are that the hot-rolled strip (a) is produced from a steel which, in addition to 0.05 to 0.16% of C, 0.5 to 1.0% of Si, 0.3 to 1.5% of Cr, </=0.025% of P, </=0.015% of S, 0.02 to 0.10% of Al and </=0.011% of N, contains 0.2 to 0.4% of Mn, the remainder being iron and usual impurities, (b) is rapidly cooled, immediately after finish-rolling, from final rolling temperature down to the coiling temperature at a mean rate in the range from 30 DEG to 70 DEG C./s and without interruptions, and (c) is then coiled at a temperature in the range from 350 DEG to 190 DEG C.
EP85113944A 1984-11-08 1985-11-02 Method of making a dual-phase hot-rolled steel strip Expired - Lifetime EP0181583B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85113944T ATE60624T1 (en) 1984-11-08 1985-11-02 PROCESS FOR PRODUCTION OF HOT STRIP WITH TWO-PHASE STRUCTURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3440752 1984-11-08
DE3440752A DE3440752A1 (en) 1984-11-08 1984-11-08 METHOD FOR PRODUCING HOT TAPE WITH A TWO-PHASE TEXTURE

Publications (3)

Publication Number Publication Date
EP0181583A2 EP0181583A2 (en) 1986-05-21
EP0181583A3 true EP0181583A3 (en) 1988-11-17
EP0181583B1 EP0181583B1 (en) 1991-01-30

Family

ID=6249757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113944A Expired - Lifetime EP0181583B1 (en) 1984-11-08 1985-11-02 Method of making a dual-phase hot-rolled steel strip

Country Status (6)

Country Link
US (1) US4790889A (en)
EP (1) EP0181583B1 (en)
JP (1) JPH0676616B2 (en)
AT (1) ATE60624T1 (en)
CA (1) CA1269256A (en)
DE (2) DE3440752A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3039842B2 (en) * 1994-12-26 2000-05-08 川崎製鉄株式会社 Hot-rolled and cold-rolled steel sheets for automobiles having excellent impact resistance and methods for producing them
EP0750049A1 (en) 1995-06-16 1996-12-27 Thyssen Stahl Aktiengesellschaft Ferritic steel and its manufacture and use
AU756917B2 (en) * 1996-06-07 2003-01-30 Corus Staal B.V. Process and device for producing a high-strength steel strip
NL1007739C2 (en) * 1997-12-08 1999-06-09 Hoogovens Staal Bv Method and device for manufacturing a high strength steel strip.
CZ6999A3 (en) 1996-07-12 1999-10-13 Thyssen Stahl Ag Hot rolled steel band and process for producing thereof
NL1007731C2 (en) 1997-12-08 1999-06-09 Hoogovens Staal Bv Method and device for manufacturing a ferritically rolled steel strip.
CA2297291C (en) * 1999-02-09 2008-08-05 Kawasaki Steel Corporation High tensile strength hot-rolled steel sheet and method of producing the same
EP1191114B1 (en) * 2000-02-23 2006-12-06 JFE Steel Corporation High tensile hot-rolled steel sheet having excellent strain aging hardening properties and method for producing the same
DE10060948C2 (en) * 2000-12-06 2003-07-31 Thyssenkrupp Stahl Ag Process for producing a hot strip from a steel with a high manganese content
FI114484B (en) * 2002-06-19 2004-10-29 Rautaruukki Oyj Hot rolled strip steel and its manufacturing process
DE10327383C5 (en) * 2003-06-18 2013-10-17 Aceria Compacta De Bizkaia S.A. Plant for the production of hot strip with dual phase structure
ES2316950T3 (en) 2004-11-24 2009-04-16 Giovanni Arvedi HOT LAMINATED STAINLESS STEEL SHEET PROVIDED WITH THE CHARACTERISTICS OF A COLD LAMINATED SHEET.
CN109988970B (en) * 2019-04-01 2021-08-31 山东钢铁集团日照有限公司 Cold-rolled Q & P980 steel with different yield ratios and production method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4316753A (en) * 1978-04-05 1982-02-23 Nippon Steel Corporation Method for producing low alloy hot rolled steel strip or sheet having high tensile strength, low yield ratio and excellent total elongation
EP0061503A1 (en) * 1980-10-14 1982-10-06 Kawasaki Steel Corporation Process for manufacturing hot-rolled dual-phase high-tensile steel plate
EP0068598A2 (en) * 1981-02-20 1983-01-05 Kawasaki Steel Corporation Dual phase-structured hot rolled high-tensile strength steel sheet and a method of producing the same
EP0072867A1 (en) * 1981-02-20 1983-03-02 Kawasaki Steel Corporation Process for manufacturing high-tensile hot-rolled steel strip having a low yield ratio due to its mixed structure
EP0019193B1 (en) * 1979-05-09 1984-03-21 SSAB Svenskt Stal AB A method of making steel strip with high strength and formability

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5818410B2 (en) * 1977-12-06 1983-04-13 新日本製鐵株式会社 Method for manufacturing high ductility low yield ratio hot rolled high tensile strength thin steel sheet
AU527097B2 (en) * 1979-01-12 1983-02-17 Nippon Steel Corporation Artifically aged low yield to tensile strength ratio high strength steel sheet
JPS5927370B2 (en) * 1980-07-05 1984-07-05 新日本製鐵株式会社 High strength cold rolled steel plate for press working
JPS5893814A (en) * 1981-11-30 1983-06-03 Kawasaki Steel Corp Production of low yield ratio and high tensile thick steel plate
US4466842A (en) * 1982-04-03 1984-08-21 Nippon Steel Corporation Ferritic steel having ultra-fine grains and a method for producing the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4316753A (en) * 1978-04-05 1982-02-23 Nippon Steel Corporation Method for producing low alloy hot rolled steel strip or sheet having high tensile strength, low yield ratio and excellent total elongation
EP0019193B1 (en) * 1979-05-09 1984-03-21 SSAB Svenskt Stal AB A method of making steel strip with high strength and formability
EP0061503A1 (en) * 1980-10-14 1982-10-06 Kawasaki Steel Corporation Process for manufacturing hot-rolled dual-phase high-tensile steel plate
EP0068598A2 (en) * 1981-02-20 1983-01-05 Kawasaki Steel Corporation Dual phase-structured hot rolled high-tensile strength steel sheet and a method of producing the same
EP0072867A1 (en) * 1981-02-20 1983-03-02 Kawasaki Steel Corporation Process for manufacturing high-tensile hot-rolled steel strip having a low yield ratio due to its mixed structure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CAHIERS D'INFORMATIONS TECHNIQUES DE LA REVUE DE METALLURGIE, Band 81, Nr. 12, Dezember 1984, Seiten 925-929, Paris, FR; A. TIVOLLE et al.: "Production endustrielle d'acier double-phase directement en sortie de train à bandes" *

Also Published As

Publication number Publication date
JPS61159535A (en) 1986-07-19
EP0181583A2 (en) 1986-05-21
ATE60624T1 (en) 1991-02-15
EP0181583B1 (en) 1991-01-30
JPH0676616B2 (en) 1994-09-28
CA1269256A (en) 1990-05-22
DE3581591D1 (en) 1991-03-07
DE3440752C2 (en) 1987-08-06
DE3440752A1 (en) 1986-05-22
US4790889A (en) 1988-12-13

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