ATE266741T1 - METHOD FOR PRODUCING A HOT STRIP - Google Patents

METHOD FOR PRODUCING A HOT STRIP

Info

Publication number
ATE266741T1
ATE266741T1 AT00103097T AT00103097T ATE266741T1 AT E266741 T1 ATE266741 T1 AT E266741T1 AT 00103097 T AT00103097 T AT 00103097T AT 00103097 T AT00103097 T AT 00103097T AT E266741 T1 ATE266741 T1 AT E266741T1
Authority
AT
Austria
Prior art keywords
strip
recrystallization
cooling
degrees
temperature
Prior art date
Application number
AT00103097T
Other languages
German (de)
Inventor
Rudolf Prof Dr-Ing Kawalla
Thomas Dr-Ing Heller
Bernhard Dr-Ing Engl
Karl Ernst Dipl-Ing Friedrich
Hans Dr-Ing Pircher
Hans-Peter Dipl-Ing Schmitz
Original Assignee
Thyssenkrupp 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7902339&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ATE266741(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Thyssenkrupp Stahl Ag filed Critical Thyssenkrupp Stahl Ag
Application granted granted Critical
Publication of ATE266741T1 publication Critical patent/ATE266741T1/en

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
    • 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
    • B21B1/24—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 in a continuous or semi-continuous process
    • B21B1/26—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 in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • 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
    • B21B1/24—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 in a continuous or semi-continuous process
    • B21B1/28—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 in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/04—Ferritic rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • 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
    • C21D8/0236—Cold 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
    • 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
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment

Landscapes

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

Abstract

Hot rolled microalloyed steel strip production, uses inter-stand cooling to allow final rolling passes at a temperature below the recrystallization temperature. Production of hot rolled strip (W) of unalloyed or low alloy steel containing micro-alloying elements, from optionally reheated continuously cast slabs, plates or strip, comprises: (a) feeding strip into the first stand (F1) of a tandem finishing line (FS) at ≥ 30 degrees C above the recrystallization end temperature (TR); (b) continuously rolling the strip in one or more passes in the austenite recrystallization region; (c) cooling the strip between adjacent stands (F1-F7) by cooling devices (K2-K7) to ≥ 20 degrees C below the recrystallization end temperature (TR) at a cooling rate of ≥ 10 degrees C/sec.; and (d) rolling the strip at below the recrystallization end temperature (TR) in several passes with a total deformation ( epsilon h) of ≥ 30%. An Independent claim is also included for a hot strip line for carrying out the above process.
AT00103097T 1999-03-25 2000-02-16 METHOD FOR PRODUCING A HOT STRIP ATE266741T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19913498A DE19913498C1 (en) 1999-03-25 1999-03-25 Process for producing a hot strip and hot strip line for carrying out the method

Publications (1)

Publication Number Publication Date
ATE266741T1 true ATE266741T1 (en) 2004-05-15

Family

ID=7902339

Family Applications (1)

Application Number Title Priority Date Filing Date
AT00103097T ATE266741T1 (en) 1999-03-25 2000-02-16 METHOD FOR PRODUCING A HOT STRIP

Country Status (4)

Country Link
EP (1) EP1038978B1 (en)
AT (1) ATE266741T1 (en)
DE (2) DE19913498C1 (en)
ES (1) ES2220272T3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112006003169B4 (en) * 2005-12-01 2013-03-21 Posco Steel sheets for hot press forming with excellent heat treatment and impact properties, hot pressed parts produced therefrom and process for their production
KR100660229B1 (en) * 2005-12-26 2006-12-21 주식회사 포스코 Thick steel plate for welded structure having high strength and excellent toughness at the center of thickness and small variation of properties along with through-thickness and method of producing the same
DE102013107010A1 (en) * 2013-07-03 2015-01-22 Thyssenkrupp Steel Europe Ag Plant and method for hot rolling steel strip
CN103447295B (en) * 2013-08-14 2015-02-04 武钢集团昆明钢铁股份有限公司 Manufacturing method of hot rolled steel plate with low alloy structural steel
CN110665964B (en) * 2019-10-14 2021-06-04 攀钢集团攀枝花钢铁研究院有限公司 Method for rolling thin X70 pipeline steel strip
EP4101552A1 (en) * 2021-06-09 2022-12-14 Primetals Technologies Austria GmbH Method for producing of a microalloyed steel, a microalloyed steel produced by means of the method, and an integrated casting-rolling system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3437637A1 (en) * 1984-10-13 1986-04-24 Thyssen Stahl AG, 4100 Duisburg Process for producing heavy plate
US4662950A (en) * 1985-11-05 1987-05-05 Bethlehem Steel Corporation Method of making a steel plate for construction applications
GB8829272D0 (en) * 1988-12-15 1989-01-25 Davy Mckee Sheffield The operation of a multi-stand hot rolling mill
US5810951A (en) * 1995-06-07 1998-09-22 Ipsco Enterprises Inc. Steckel mill/on-line accelerated cooling combination
DE19725434C2 (en) * 1997-06-16 1999-08-19 Schloemann Siemag Ag Process for rolling hot wide strip in a CSP plant

Also Published As

Publication number Publication date
DE19913498C1 (en) 2000-10-12
EP1038978A1 (en) 2000-09-27
ES2220272T3 (en) 2004-12-16
EP1038978B1 (en) 2004-05-12
DE50006370D1 (en) 2004-06-17

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Legal Events

Date Code Title Description
RZN Patent revoked