EP2128277A1 - Procédé pour le recuit de bandes métalliques - Google Patents

Procédé pour le recuit de bandes métalliques Download PDF

Info

Publication number
EP2128277A1
EP2128277A1 EP08164667A EP08164667A EP2128277A1 EP 2128277 A1 EP2128277 A1 EP 2128277A1 EP 08164667 A EP08164667 A EP 08164667A EP 08164667 A EP08164667 A EP 08164667A EP 2128277 A1 EP2128277 A1 EP 2128277A1
Authority
EP
European Patent Office
Prior art keywords
annealing
strip
caused
rolling
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.)
Withdrawn
Application number
EP08164667A
Other languages
German (de)
English (en)
Inventor
Mats Gartz
Ola Ritzen
Anders Carlsson
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.)
Linde Sverige AB
Original Assignee
AGA AB
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 AGA AB filed Critical AGA AB
Publication of EP2128277A1 publication Critical patent/EP2128277A1/fr
Withdrawn legal-status Critical Current

Links

Images

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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following 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
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • 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

Definitions

  • the present invention relates to hot rolling of steel strips. More precisely, the invention relates to a method for annealing of steel strips in connection with such hot rolling.
  • strips of stainless steel are manufactured by rolling in for example Steckel type rolling mills, in which the strip is hot rolled in several steps between which steps the strip is coiled.
  • Another type of rolling mills is those of tandem type, in which hot rolling takes place at several parallel stations.
  • hot rolling takes place at a temperature of about 900°C - 1200°C, and is followed firstly by an annealing step at typically about 1100°C - 1200°C and thereafter by a pickling step.
  • the present invention solves the above described problems.
  • the invention relates to a method for use when hot rolling steel strips, where the strip in a first step is hot rolled, in a second step is annealed, and where it finally is coiled for storage, transport or additional processing, and is characterised in that the annealing is caused to be performed in an annealing furnace through which the strip is transported after the hot rolling but before the coiling.
  • Figure 1 is an overview over a method according to the present invention.
  • a strip made of steel, preferably stainless steel, 1 is hot rolled in a hot rolling step 2.
  • the hot rolling takes place in a rolling mill of Steckel type, but it may also take place in a rolling mill of tandem type.
  • the rolling temperature is conventional and typically lies between 900°C and 1200°C.
  • the strip 1 is transported, continuously and in the direction as indicated by the arrow 7, up to and through an annealing furnace 4, in which the strip 1 is annealed.
  • the annealing takes place at an essentially constant temperature of between 1100°C and 1200°C.
  • the strip 1 is further transported to a coiling station 5, where the strip 1 is coiled on a roll for storage, transport or additional processing, such as a cold rolling step.
  • annealing is caused to be carried out on the not yet coiled strip 1.
  • higher efficiency and better use of resources in the heating of the strip 1 to annealing temperature is achieved.
  • this heating is quicker than in case the coiled strip had been heated to annealing temperature. Only after annealing, the strip 1 is coiled at the coiling station 5.
  • the annealing furnace 4 is heated by at least one oxyfuel burner.
  • the oxyfuel burner is driven with a gaseous fuel, such as natural gas or propane, and an oxidant with an oxygen content of at least 80 percentages by weight.
  • the addition advantage is achieved that the heating efficiency increases further in comparison to annealing furnaces being heated by conventional air burners, and the heating is energy efficient even at the elevated temperatures at which annealing is performed.
  • the annealing furnace 4 is a tunnel furnace, and annealing of the strip 1 takes place continuously since the strip 1 is transported through the annealing furnace 4 with essentially constant velocity.
  • the strip 1 may be moving all the time, with no operation interruptions, until it has been coiled at the coiling station 5.
  • the strip 1 before annealing but after rolling, the strip 1 is caused to cool down from rolling temperature to a transformation temperature, at which precipitation and/or recrystallisation takes place in the material of the strip 1.
  • this transformation temperature is below about 400°C. This cooling down is performed in a conventional manner per se in a cooling down station 6.
  • cooling down may be performed only when necessary, depending on the material of the strip 1, desired final result, etc., however the cooling down function may be reconnected again when so is desired. In other words, an increased flexibility is achieved in the process, without adding any serious drawback as to its efficiency.
  • one or several DFI burners are used in a preheating step 3.
  • the DFI burners are driven with a gaseous fuel, such as propane or natural gas, and an oxidant with an oxygen content of at least 80 percentages by weight.
  • the strip 1 is heated so that it essentially reaches the desired annealing temperature before it leaves the preheating step 3. In this way, the strip 1 has the correct temperature even before it is brought into the annealing furnace 3, whereby annealing does not have to last longer than necessary.
  • the preheating step 3 is also arranged so that its power may be adapted to the temperature of the strip 1 at the entry into the preheating step 3.
  • this may be achieved by controlling the number of simultaneously switched on DFI burners, by controlling the power of the DFI burners, etc. In this way, a suitable preheating can be achieved, regardless of if a cooling down step is performed or not.
  • the annealing furnace 4 itself comprises one or several DFI burners, of the type described above, that in combination with one or several oxyfuel burners achieve the annealing of the strip 1.
  • a cheap, fast and efficient annealing of hot rolled steel strips is achieved, with no unnecessary thermal losses.
  • the annealing is not sensitive for neither the dimensions and the geometrical design of the preheated material, nor the distance between the heat source and the material, which is the case when using for example induction heating.
  • the extra processing step implied by having a separately arranged annealing furnace for coiled steel strips may be eliminated, which saves time as well as space, and which leads to increased production capacity, but also to diminished costs in terms of installation and maintenance.

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 Strip Materials And Filament Materials (AREA)
EP08164667A 2008-05-29 2008-09-19 Procédé pour le recuit de bandes métalliques Withdrawn EP2128277A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0801262 2008-05-29

Publications (1)

Publication Number Publication Date
EP2128277A1 true EP2128277A1 (fr) 2009-12-02

Family

ID=40020230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08164667A Withdrawn EP2128277A1 (fr) 2008-05-29 2008-09-19 Procédé pour le recuit de bandes métalliques

Country Status (1)

Country Link
EP (1) EP2128277A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8709286B2 (en) 2008-10-30 2014-04-29 Archer Daniels Midland Company Reduction of HMF ethers with metal catalyst

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2630877B1 (de) * 1976-07-09 1977-11-24 Schloemann Siemag Ag Warmwalzen von Metallband
US4861390A (en) * 1985-03-06 1989-08-29 Kawasaki Steel Corporation Method of manufacturing formable as-rolled thin steel sheets
EP0524162A2 (fr) * 1991-07-17 1993-01-20 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Procédé de fabrication d'une bande mince en acier doux
WO1997046332A1 (fr) * 1996-06-07 1997-12-11 Hoogovens Staal B.V. Procede et appareil de production d'une bande d'acier
US5771732A (en) * 1995-04-19 1998-06-30 Sms Schloemann-Siemag Aktiengesellschaft Steckel mill
EP0937512A1 (fr) * 1998-02-19 1999-08-25 Kvaerner Metals Continuous Casting Limited Dispositif et procédé à faible coût pour fabriquer de bande d' acier mince
EP1037721B1 (fr) * 1997-12-08 2003-11-12 Corus Staal BV Procede et dispositif de production d'une bande d'acier a laminage ferritique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2630877B1 (de) * 1976-07-09 1977-11-24 Schloemann Siemag Ag Warmwalzen von Metallband
US4861390A (en) * 1985-03-06 1989-08-29 Kawasaki Steel Corporation Method of manufacturing formable as-rolled thin steel sheets
EP0524162A2 (fr) * 1991-07-17 1993-01-20 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Procédé de fabrication d'une bande mince en acier doux
US5771732A (en) * 1995-04-19 1998-06-30 Sms Schloemann-Siemag Aktiengesellschaft Steckel mill
WO1997046332A1 (fr) * 1996-06-07 1997-12-11 Hoogovens Staal B.V. Procede et appareil de production d'une bande d'acier
EP1037721B1 (fr) * 1997-12-08 2003-11-12 Corus Staal BV Procede et dispositif de production d'une bande d'acier a laminage ferritique
EP0937512A1 (fr) * 1998-02-19 1999-08-25 Kvaerner Metals Continuous Casting Limited Dispositif et procédé à faible coût pour fabriquer de bande d' acier mince

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ROHDE W: "COMPACT STRIP PRODUCTION (CSP): THE APPROACH FOR ECONOMICAL PRODUCTION OF HOT WIDE STRIP", CAHIERS D'INFORMATIONS TECHNIQUES DE LA REVUE DE METALLURGIE, REVUE DE METALLURGIE. PARIS, FR, vol. 91, no. 4, 1 April 1994 (1994-04-01), pages 529 - 540, XP000449405, ISSN: 0035-1563 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8709286B2 (en) 2008-10-30 2014-04-29 Archer Daniels Midland Company Reduction of HMF ethers with metal catalyst

Similar Documents

Publication Publication Date Title
CN1292847C (zh) 奥氏体不锈钢热轧带材的制造方法和设备
CA2686377C (fr) Procede de laminage a chaud et de traitement thermique d'une bande en acier
EP2267171B1 (fr) Recuit d'une bande d'aluminium laminée à froid
EP2904125A1 (fr) Préchauffage et recuit de bande de métal laminée à froid
EP1452247B1 (fr) Procede de fabrication d'une tole d'acier
CN102492824A (zh) 一种高强度钢带或钢板的连续热处理方法
EP2128277A1 (fr) Procédé pour le recuit de bandes métalliques
EP1950314A1 (fr) Procédé de traitement thermique de produits en acier allongée
JP6260448B2 (ja) 熱延鋼帯の熱処理設備
EP3685931A1 (fr) Procédé de traitement thermique d'isolation thermique mobile en ligne par laminage à chaud et ligne de traitement thermique
JP6350322B2 (ja) 高強度鋼板の製造方法および処理施設
KR101659533B1 (ko) 냉간압연 강대용 연속소둔 열처리방법
CN114214485B (zh) 一种铁素体不锈钢热轧热卷板的一火热装热处理工艺
JP7320512B2 (ja) 高強度ｑ＆ｐ鋼熱延コイルの軟化方法
JP4085975B2 (ja) 熱間圧延方法
CN110616299A (zh) 一种高强钢的生产方法
CN115943221A (zh) 用于生产电工钢带的方法
EP2708609A1 (fr) Système et procédé de traitement par induction de métaux
JP4635456B2 (ja) 鋼板の連続焼鈍方法
CN105682824A (zh) 对包含在冷却流体中的热量的使用方法
CN110616302A (zh) 一种高强度q&p钢热轧卷的软化方法
JPH06330177A (ja) 大径角形鋼管コーナーｒ部の熱処理装置
JP2005232577A (ja) リング状線材の加熱装置およびその加熱方法
JP2004156127A (ja) 熱処理炉の操業方法及び熱処理装置
JP2004167539A (ja) フェライト系ステンレス鋼材の加熱方法及び加熱設備

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

AKY No designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20100603