EP0881305B1 - Verfahren zum Herstellen von dünnen ferritischen rostfreien Stahlbändern - Google Patents

Verfahren zum Herstellen von dünnen ferritischen rostfreien Stahlbändern Download PDF

Info

Publication number
EP0881305B1
EP0881305B1 EP98401090A EP98401090A EP0881305B1 EP 0881305 B1 EP0881305 B1 EP 0881305B1 EP 98401090 A EP98401090 A EP 98401090A EP 98401090 A EP98401090 A EP 98401090A EP 0881305 B1 EP0881305 B1 EP 0881305B1
Authority
EP
European Patent Office
Prior art keywords
strip
temperature
carbides
cooling
austenite
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 - Lifetime
Application number
EP98401090A
Other languages
English (en)
French (fr)
Other versions
EP0881305A1 (de
Inventor
Philippe Paradis
Philippe Martin
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.)
USINOR SA
Original Assignee
USINOR SA
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 USINOR SA filed Critical USINOR SA
Publication of EP0881305A1 publication Critical patent/EP0881305A1/de
Application granted granted Critical
Publication of EP0881305B1 publication Critical patent/EP0881305B1/de
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
    • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
    • C21D8/0215—Rapid solidification; Thin strip casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/002—Heat treatment of ferrous alloys containing Cr
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • 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

Definitions

  • the invention relates to the metallurgy of stainless steels. More particularly, it relates to the casting of ferritic stainless steels directly from liquid metal in the form of strips a few mm thick.
  • the winding of the strip most often occurs at a temperature of the order of 700 to 900 ° C., depending on its thickness. and the casting speed.
  • the winding temperature also depends, of course, on the distance between the rolls and the winder.
  • the wound strip is then left to cool naturally, before subjecting it to metallurgical treatments comparable to those usually carried out on hot-rolled strips made from conventional continuous casting slabs.
  • the fragility of the metal is precisely attributed to these large carbides, the size of which is around 1 to 5 ⁇ m. They constitute sites of initiation for the ruptures which propagate by cleavage in the surrounding ferritic matrix: their harmful effect is added to that of the columnar structure with large grains.
  • Document JP-A-5293595 recommends carrying out the winding at a temperature of 700 to 200 ° C., while giving the steel low carbon and nitrogen contents (0.030% or less) and a niobium content of 0 , 1 to 1% acting as a stabilizer.
  • ⁇ p 420 x% C + 470 x% N + 23 x% Ni + 9 x% Cu + 7 x% Mn - 11.5 x% Cr - 11.5 x% Si - 12 x% Mo - 23 x% V - 47 x% Nb - 49 x% Ti - 52 x% Al + 189.
  • the object of the invention is to propose an economical mode of production of thin strips of ferritic stainless steel of the AISI 430 and related types by casting between cylinders, which provides said strips with sufficient ductility to allow operations of unwinding, shearing of edges and cold processing (pickling, rolling ...) to take place without incidents such as strip breakage or the appearance of cracks on the edges.
  • this process should not include steps requiring the addition of complex facilities to a standard cylinder casting machine. Neither should it make it necessary to carry out an elaboration of the liquid metal aimed at obtaining very low contents of elements such as carbon and nitrogen, as well as the addition of elements of expensive alloys.
  • the subject of the invention is a method of manufacturing ferritic stainless steel strips, according to which, directly from liquid metal, it is solidified between two close cylinders with horizontal axes, internally cooled and turning in direction contrary, a strip of ferritic stainless steel of the type containing at most 0.12% of carbon, at most 1% of manganese, at most 1% of silicon, at most 0.040% of phosphorus, at most 0.030% of sulfur and between 16 and 18% chromium, characterized in that the said strip is then cooled or allowed to cool while avoiding making it stay in the field of transformation of austenite into ferrite and carbides, in that the winding is carried out of said strip at a temperature between 600 ° C and the martensitic transformation temperature Ms, in that the wound strip is allowed to cool at a maximum speed of 300 ° C / h to a temperature between 200 ° C and ambient temperature, and in that a closed annealing of said strip is then carried out.
  • the invention consists, starting from a strip of ferritic stainless steel of standard composition cast between cylinders, to cool and to wind said strip under special conditions, before subjecting it to annealing. closed.
  • This treatment essentially aims to limit as much as possible the formation of large embrittling carbides. For this, it is necessary to limit the precipitation of carbides and to favor the transformation of austenite into martensite in the raw casting stage, while avoiding however that this transformation into martensite does not occur when the strip is not yet wound.
  • Treatment A consists, in accordance with the prior art described above, of allowing the strip to cool naturally in the open air after it leaves the casting rolls, and of winding it at around 800 ° C., while it is found in the precipitation zone of chromium carbides at ferritic joints and at ferrite-austenite interfaces. This winding causes, as has been said, a considerable slowing down of the cooling of the strip, which is then forced to remain for a long time in the zone for transforming austenite into ferrite and chromium carbides, before returning to ambient temperature. .
  • Treatment B consists in letting the strip cool naturally in the open air, allowing it to reach room temperature without winding it.
  • the strip does not remain in the zone of transformation of austenite into ferrite and chromium carbides, but it undergoes a significant martensitic transformation between the temperatures Ms and Mf. We will see why such a treatment cannot be included in the invention.
  • Treatment C which is representative of the invention, consists in first allowing the strip to cool naturally, without being wound, so as to avoid it staying in the zone for transforming austenite into ferrite and chromium carbides, and winding only at a temperature of around 600 ° C. During the cooling of the wound strip, this ends up substantially joining the final thermal path of treatment A.
  • Treatment D is in principle identical to treatment C, but the winding of the strip takes place only at a temperature of approximately 300 ° C. This temperature remains however imperatively higher than Ms (which depends on the chemical composition of the steel), and during the cooling of the coil this prevents the strip from staying in the area where the martensitic transformation would take place in a very significant way. Its final thermal path joins those of treatments A and C.
  • the picture in Figure 2 shows a portion of a sample of a reference strip which has followed the thermal path A in Figure 1 (therefore a winding at 800 ° C) to be brought in wound form at room temperature, then underwent closed annealing under usual conditions, namely a stay at approximately 800 ° C. for 6 hours.
  • the strip has the chemical composition specified above and a thickness of 3 mm. It is observed that the majority of the sample consists of large ferritic grains 3.
  • the zones 4 comprising small ferritic grains resulting from the transformation of martensite ⁇ 'during closed annealing represent only a minority fraction of l 'sample. We especially notice the presence, within the structure, of continuous films of chromium carbides 5.
  • FIG. 3 shows a portion of a sample of a strip according to the invention (of the same composition and thickness as that of FIG. 2) which has followed an intermediate thermal path between paths C and D in the figure 1 to room temperature (the strip was wound at 500 ° C.), then underwent closed cup annealing identical to that undergone by the reference sample of FIG. 2. It is observed that the large ferritic grains 3 are always present, but that the zones with small ferritic grains 6 resulting from the transformation of the martensite ⁇ 'are in greater proportion.
  • the winding temperature has no influence on the ductility at 20 ° C. of the raw casting strip, which has not yet undergone closed annealing.
  • This ductility is very poor, and it is not improved by closed cup annealing in the case of the reference strip, hot wound.
  • the closed cup annealing was, in this reference case, powerless to promote a structure of the metal matrix and a distribution of carbides favorable to good ductility.
  • the ductility of the wound strip under the conditions recommended by the invention could be considerably improved by closed cup annealing, and brought to a very satisfactory level.
  • a resilience of the order of 30 to 40 J / cm 2 is sufficient so that cold treatments (unwinding, shearing of the edges in particular) can be carried out without damage to the strip.
  • the first fundamental idea of the invention is to impose on the strip leaving the cylinders a cooling path which makes it possible to limit the precipitation of carbides, avoiding above all those which could come from the decomposition of austenite and which are likely to coalesce into large continuous films during closed annealing.
  • the second idea is to promote, at the same stage of development, the transformation of austenite into martensite so as to obtain as much as possible of fine-grained ferrite during closed annealing. These conditions are achieved if the time spent by the cast strip is limited in the area of precipitation of carbides and nitrides from ferrite, and especially if it is avoided from staying in the area of transformation of austenite into ferrite and carbides.
  • the imposition on the strip of a cooling speed greater than or equal to 10 ° C / s between its exit from the cylinders and the moment when it reaches the temperature of 600 ° C from which the winding can take place generally provides the desired results.
  • closed annealing should be carried out on a coil whose temperature is initially between ambient and 200 ° C. It is typically carried out at a temperature of 800-850 ° C for at least 4 hours.
  • the process according to the invention has the advantage of not requiring any particular and costly adaptations of the grade such as incorporation of stabilizers and / or lowering of carbon and nitrogen contents to unusually low levels. It can be carried out on a continuous casting machine between rolls which does not need to be equipped with a hot rolling installation of the strip leaving the rolls. It also does not require any special adaptations to the stages of the manufacturing cycle after casting (closed cup annealing, shearing of edges, pickling, etc.). The only modification to a standard roll-to-roll installation that its installation is likely to require is the possible addition of a device for cooling the strip under the rolls.
  • Such a device which could be of very simple design, would make it possible to ensure that the strip never stays in the field of transformation of austenite into ferrite and carbides and that the winding is always carried out at 600 ° C. or less, whatever the casting speed and the thickness of the strip, and even if the winder is located relatively close to the rolls (which on the other hand may be desirable for the casting of other types of steel).
  • This composition corresponds to a ⁇ p criterion of 46.5% and to an Ac1 temperature of 826 ° C.
  • a winding carried out at 500 ° C. provides the strip with energy absorbed at 20 ° C (after closed annealing) of 160 J / cm 2 , for test conditions similar to those of the tests in Table 1 above.
  • the winding is carried out at 800 ° C, the energy absorbed at 20 ° C is only 100 J / cm 2 .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Continuous Casting (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Artificial Fish Reefs (AREA)
  • Metal Rolling (AREA)
  • Catalysts (AREA)
  • Heat Treatment Of Steel (AREA)
  • Chemical Vapour Deposition (AREA)
  • Wrappers (AREA)

Claims (5)

  1. Verfahren zum Herstellen von dünnen ferritischen rostfreien Stahlbändern mit weniger als 10 mm Bandstärke, bei dem man, unmittelbar vom flüssigen Metall ausgehend, ein Band aus rostfreiem, ferritischen Stahl einer Stahlsorte mit Beimengungen von höchstens 0,12% Kohlenstoff, höchstens 1% Mangan, höchstens 1% Silizium, höchstens 0,040% Phosphor, höchstens 0,030% Schwefel und zwischen 16 und 18% Chrom zwischen zwei benachbarten, horizontalachsigen, innengekühlten Zylindern, welche im entgegengesetzten Sinn drehen, verfestigt, dadurch gekennzeichnet, daß man das genannte Band danach kühlt oder erkalten läßt, dabei jedoch vermeidet, es im Umwandlungsbereich des Austenit in Ferrit und Karbide zu halten, daß man das Aufspulen des Bandes bei einer Temperatur zwischen 600°C und der Temperatur der martensitischen Umwandlung Ms durchführt, daß man das gespulte Band, mit einer maximalen Geschwindigkeit von 300°C/h bis zu einer Temperatur zwischen 200°C und der Umgebungstemperatur erkalten läßt, und daß man anschließend ein Ausglühen des Bandes im Glühtopf vornimmt.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das genannte Ausglühen im Glühtopf während wenigstens 4 Stunden bei einer Temperatur von 800 bis 850°C, durchgeführt wird.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß man vermeidet, das Band im Umwandlungsbereich des Austenit in Ferrit und Karbide zu halten, indem man eine Abkühlungsgeschwindigkeit größer oder gleich 10°C/s, wenigstens zwischen dem Zeitpunkt wenn das verfestigte Band die Zylinder verläßt und dem Zeitpunkt wenn es die Temperatur von 600°C erreicht.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß man dem Band die genannte Abkühlungsgeschwindigkeit beimißt, indem man ein flüssiges Kühlmedium auf die Bandoberfläche spritzt.
  5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß ein zusätzliches Warmwalzen des Bandes, vor seinem Aufspulen, bei einer Temperatur zwischen 900 und 1150°C und mit einer Reduktionsrate der Banddicke von wenigstens 5% durchführt wird.
EP98401090A 1997-05-29 1998-05-06 Verfahren zum Herstellen von dünnen ferritischen rostfreien Stahlbändern Expired - Lifetime EP0881305B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9706576 1997-05-29
FR9706576A FR2763960B1 (fr) 1997-05-29 1997-05-29 Procede de fabrication de bandes minces d'acier inoxydable ferritique, et bandes minces ainsi obtenues

Publications (2)

Publication Number Publication Date
EP0881305A1 EP0881305A1 (de) 1998-12-02
EP0881305B1 true EP0881305B1 (de) 2003-01-29

Family

ID=9507357

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401090A Expired - Lifetime EP0881305B1 (de) 1997-05-29 1998-05-06 Verfahren zum Herstellen von dünnen ferritischen rostfreien Stahlbändern

Country Status (24)

Country Link
US (1) US6106638A (de)
EP (1) EP0881305B1 (de)
JP (1) JP4224733B2 (de)
KR (1) KR100538683B1 (de)
CN (1) CN1078113C (de)
AT (1) ATE231925T1 (de)
AU (1) AU706022B2 (de)
BR (1) BR9801552A (de)
CA (1) CA2238803C (de)
CZ (1) CZ291528B6 (de)
DE (1) DE69810988T2 (de)
DK (1) DK0881305T3 (de)
ES (1) ES2191263T3 (de)
FR (1) FR2763960B1 (de)
ID (1) ID20384A (de)
MX (1) MXPA98004218A (de)
PL (1) PL187133B1 (de)
RO (1) RO120322B1 (de)
RU (1) RU2192483C2 (de)
SK (1) SK284091B6 (de)
TR (1) TR199800976A3 (de)
TW (1) TW369446B (de)
UA (1) UA55398C2 (de)
ZA (1) ZA984147B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005063058B3 (de) * 2005-12-29 2007-05-24 Thyssenkrupp Nirosta Gmbh Verfahren zum Herstellen eines Kaltbands mit ferritischem Gefüge
CN101607266A (zh) * 2009-07-20 2009-12-23 山东泰山钢铁集团有限公司 一种适用于炉卷轧机生产铁素体不锈钢热轧钢带的方法

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6500284B1 (en) * 1998-06-10 2002-12-31 Suraltech, Inc. Processes for continuously producing fine grained metal compositions and for semi-solid forming of shaped articles
FR2790485B1 (fr) * 1999-03-05 2002-02-08 Usinor Procede de coulee continue entre cylindres de bandes d'acier inoxydable ferritique a haute ductilite, et bandes minces ainsi obtenues
USRE40950E1 (en) 1999-03-30 2009-11-10 Jfe Steel Corporation Ferritic stainless steel plate
JP4518645B2 (ja) * 2000-01-21 2010-08-04 日新製鋼株式会社 高強度高靱性マルテンサイト系ステンレス鋼板並びに冷延耳切れ抑止方法および鋼板製造法
DE10046181C2 (de) * 2000-09-19 2002-08-01 Krupp Thyssen Nirosta Gmbh Verfahren zum Herstellen eines überwiegend aus Mn-Austenit bestehenden Stahlbands oder -blechs
EP1326725B1 (de) * 2000-09-29 2009-08-05 Nucor Corporation Herstellung von dünnem stahlblech
CA2378934C (en) 2002-03-26 2005-11-15 Ipsco Inc. High-strength micro-alloy steel and process for making same
US7220325B2 (en) * 2002-04-03 2007-05-22 Ipsco Enterprises, Inc. High-strength micro-alloy steel
US7842434B2 (en) * 2005-06-15 2010-11-30 Ati Properties, Inc. Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells
US8158057B2 (en) 2005-06-15 2012-04-17 Ati Properties, Inc. Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells
US7981561B2 (en) 2005-06-15 2011-07-19 Ati Properties, Inc. Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells
JP4514032B2 (ja) * 2004-06-10 2010-07-28 新日鐵住金ステンレス株式会社 塗装密着性の良好なフェライト系ステンレス鋼帯の製造方法
RU2493266C2 (ru) 2009-03-11 2013-09-20 Зальцгиттер Флахшталь Гмбх Способ изготовления горячекатаной полосы и изготовленная из ферритной стали горячекатаная полоса
KR101312776B1 (ko) * 2009-12-21 2013-09-27 주식회사 포스코 마르텐사이트계 스테인리스강 및 그 제조방법
CN102211179B (zh) * 2010-04-09 2013-01-02 中国科学院金属研究所 一种应用于大型马氏体不锈钢铸件的高温打箱工艺
KR101614614B1 (ko) * 2014-10-22 2016-04-22 주식회사 포스코 고강도, 고연성의 페라이트계 스테인리스 강판 및 그의 제조방법
RU2615426C1 (ru) * 2015-12-03 2017-04-04 Федеральное Государственное Унитарное Предприятие "Центральный научно-исследовательский институт черной металлургии им. И.П. Бардина" (ФГУП "ЦНИИчермет им. И.П. Бардина") Способ производства горячекатаной высокопрочной коррозионно-стойкой стали
CN107142364A (zh) * 2017-04-27 2017-09-08 酒泉钢铁(集团)有限责任公司 一种超纯铁素体不锈钢双辊薄带铸轧生产工艺
CN114959466B (zh) * 2022-05-17 2023-06-13 天津太钢天管不锈钢有限公司 一种低铬铁素体不锈钢及其制造方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155326A (en) * 1981-03-23 1982-09-25 Nippon Steel Corp Production of ferritic stainless steel sheet excellent in workability
ES2021211A6 (es) * 1990-03-01 1991-10-16 Acerinox Sa Procedimiento mejorado de laminacion en caliente en un tren steckel.
FR2665652A1 (fr) * 1990-08-13 1992-02-14 Usinor Sacilor Procede et dispositif de fabrication d'une bande en acier inoxydable semi-ferritique a partir de metal en fusion.
JP3141120B2 (ja) * 1992-02-21 2001-03-05 株式会社トプコン 位相測定装置及び距離測定装置
JP3001718B2 (ja) * 1992-04-17 2000-01-24 新日本製鐵株式会社 フェライト系ステンレス鋼薄肉鋳片の製造方法
JP2682335B2 (ja) * 1992-06-01 1997-11-26 住友金属工業株式会社 フェライト系ステンレス鋼熱延鋼帯の製造法
JPH06220545A (ja) * 1993-01-28 1994-08-09 Nippon Steel Corp 靱性の優れたＣｒ系ステンレス鋼薄帯の製造方法
WO1995020683A1 (fr) * 1994-01-26 1995-08-03 Kawasaki Steel Corporation Procede de production de tole d'acier inoxydable a haute resistance a la corrosion
JPH08295943A (ja) * 1995-04-27 1996-11-12 Nippon Steel Corp 冷延表面性状の優れたフェライト系ステンレス鋼薄板の製造方法
JP3879164B2 (ja) * 1997-03-18 2007-02-07 Ｊｆｅスチール株式会社 冷間圧延性に優れたフェライト系ステンレス熱延鋼帯の製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005063058B3 (de) * 2005-12-29 2007-05-24 Thyssenkrupp Nirosta Gmbh Verfahren zum Herstellen eines Kaltbands mit ferritischem Gefüge
CN101607266A (zh) * 2009-07-20 2009-12-23 山东泰山钢铁集团有限公司 一种适用于炉卷轧机生产铁素体不锈钢热轧钢带的方法

Also Published As

Publication number Publication date
ATE231925T1 (de) 2003-02-15
KR19980087462A (ko) 1998-12-05
TR199800976A2 (xx) 1999-10-21
AU6483598A (en) 1998-12-03
SK284091B6 (sk) 2004-09-08
JP4224733B2 (ja) 2009-02-18
BR9801552A (pt) 1999-06-01
US6106638A (en) 2000-08-22
FR2763960A1 (fr) 1998-12-04
SK67898A3 (en) 1998-12-02
DE69810988D1 (de) 2003-03-06
AU706022B2 (en) 1999-06-03
TW369446B (en) 1999-09-11
RU2192483C2 (ru) 2002-11-10
RO120322B1 (ro) 2005-12-30
CZ291528B6 (cs) 2003-03-12
CA2238803C (fr) 2007-02-20
ID20384A (id) 1998-12-03
UA55398C2 (uk) 2003-04-15
ZA984147B (en) 1998-11-25
KR100538683B1 (ko) 2006-03-23
TR199800976A3 (tr) 1999-10-21
DE69810988T2 (de) 2003-11-27
CZ165898A3 (cs) 1999-08-11
CN1078113C (zh) 2002-01-23
ES2191263T3 (es) 2003-09-01
CA2238803A1 (fr) 1998-11-29
DK0881305T3 (da) 2003-05-26
MXPA98004218A (es) 2004-09-10
JPH10330842A (ja) 1998-12-15
PL326582A1 (en) 1998-12-07
FR2763960B1 (fr) 1999-07-16
PL187133B1 (pl) 2004-05-31
EP0881305A1 (de) 1998-12-02
CN1212189A (zh) 1999-03-31

Similar Documents

Publication Publication Date Title
EP0881305B1 (de) Verfahren zum Herstellen von dünnen ferritischen rostfreien Stahlbändern
EP1067203B1 (de) Verfahren zum Herstellen von Eisen-Kohlenstoff-Mangan-Legierungbändern und also hergestellte Bändern
EP1913169B1 (de) Herstellungsprozess von stahlblechen mit hoher festigkeit und exzellenter dehnung und hergestellte produkte
EP1899490B1 (de) Band aus austenitischem nichtrostendem stahl mit glänzendem oberflächenfinish und hervorragenden mechanischen eigenschaften
EP2155916B2 (de) Stahl von geringer dichte mit guten prägeeigenschaften
EP2855725B1 (de) Warm- oder kaltgewalzter stahl mit niedriger dichte, verfahren zur realisierung davon und verwendung davon
EP1228254B1 (de) Verfahren zum herstellen von kohlenstoffstahlbändern, insbesondere für verpackungsmaterial
EP1466024B1 (de) Verfahren zur herstellung eines eisenhüttenprodukts aus unlegiertem stahl mit hohem kupfergehalt und danach erhaltenes eisenhüttenprodukt
EP1427866B1 (de) Verfahren zur herstellung von geschweissten röhren und dadurch hergestelltes rohr
EP2072631A1 (de) Rostfreies austenitisches Stahlblech und Herstellungsverfahren eines solchen Blechs
FR2643650A1 (fr) Tole d'acier allie laminee a chaud
CA2243495C (fr) Procede d'elaboration d'une tole mince en acier a ultra bas carbone pour la realisation de produits emboutis pour emballage et tole mince obtenue
EP1061139B1 (de) Verfahren zur Herstellung von Tiefziehblechen durch Direktgiessen von dünnen Stahlbändern
EP1354070B1 (de) Isotropischer hochfester stahl, verfahren zur herstellung von blechen und hergestellte bleche
WO2001027340A1 (fr) Procede de fabrication d'une bande d'acier laminee a froid pour emboutissage profond
BE1015018A3 (fr) Procede pour le traitement thermique d'une bande d'acier laminee a froid, procede de fabrication d'une bande d'acier adaptee au fromage et bande d'acier ainsi obtenue.
JP4283687B2 (ja) 無方向性電磁鋼板の製造方法
BE893814A (fr) Procede de fabrication d'un feuillard d'acier au silicium a grains orientes et contenant de l'aluminium
BE1011557A4 (fr) Acier a haute limite d'elasticite montrant une bonne ductilite et procede de fabrication de cet acier.
FR2544333A1 (fr) Procede pour l'obtention de toles laminees a froid et recuites
BE570815A (de)
BE858549A (fr) Procede pour traiter des brames d'acier coulees en continu

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 CH CY DE DK ES FI FR GB GR IE IT LI LU NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 19990602

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU NL PT SE

17Q First examination report despatched

Effective date: 20010921

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

RTI1 Title (correction)

Free format text: PROCESS FOR MANUFACTURING FERRITIC STAINLESS STEEL THIN STRIPS

RTI1 Title (correction)

Free format text: PROCESS FOR MANUFACTURING FERRITIC STAINLESS STEEL THIN STRIPS

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU NL PT SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: FRENCH

REF Corresponds to:

Ref document number: 69810988

Country of ref document: DE

Date of ref document: 20030306

Kind code of ref document: P

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030506

REG Reference to a national code

Ref country code: GR

Ref legal event code: EP

Ref document number: 20030401302

Country of ref document: GR

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20030515

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2191263

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20031030

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20110617

Year of fee payment: 14

Ref country code: FR

Payment date: 20110523

Year of fee payment: 14

Ref country code: CH

Payment date: 20110512

Year of fee payment: 14

Ref country code: LU

Payment date: 20110531

Year of fee payment: 14

Ref country code: GR

Payment date: 20110412

Year of fee payment: 14

Ref country code: IE

Payment date: 20110511

Year of fee payment: 14

Ref country code: PT

Payment date: 20110506

Year of fee payment: 14

Ref country code: SE

Payment date: 20110512

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20110526

Year of fee payment: 14

Ref country code: FI

Payment date: 20110511

Year of fee payment: 14

Ref country code: AT

Payment date: 20110427

Year of fee payment: 14

Ref country code: DK

Payment date: 20110512

Year of fee payment: 14

Ref country code: GB

Payment date: 20110504

Year of fee payment: 14

Ref country code: BE

Payment date: 20110511

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20110505

Year of fee payment: 14

Ref country code: IT

Payment date: 20110517

Year of fee payment: 14

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 20121106

BERE Be: lapsed

Owner name: *USINOR

Effective date: 20120531

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20121201

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 231925

Country of ref document: AT

Kind code of ref document: T

Effective date: 20120506

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20120506

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120531

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120506

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120506

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120531

REG Reference to a national code

Ref country code: GR

Ref legal event code: ML

Ref document number: 20030401302

Country of ref document: GR

Effective date: 20121204

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121106

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120506

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120507

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121204

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20130131

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69810988

Country of ref document: DE

Effective date: 20121201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120506

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120506

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120531

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121201

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20130821

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120507

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120506