EP1263993B1 - Procede de fabrication de tole electrique a grains non orientes - Google Patents

Procede de fabrication de tole electrique a grains non orientes Download PDF

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Publication number
EP1263993B1
EP1263993B1 EP01933708A EP01933708A EP1263993B1 EP 1263993 B1 EP1263993 B1 EP 1263993B1 EP 01933708 A EP01933708 A EP 01933708A EP 01933708 A EP01933708 A EP 01933708A EP 1263993 B1 EP1263993 B1 EP 1263993B1
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EP
European Patent Office
Prior art keywords
strip
hot
rolled
hot strip
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.)
Expired - Lifetime
Application number
EP01933708A
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German (de)
English (en)
Other versions
EP1263993A1 (fr
Inventor
Karl Ernst Friedrich
Brigitte Hammer
Rudolf Kawalla
Olaf Fischer
Jürgen Schneider
Carl-Dieter Wuppermann
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.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Stahl AG
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Filing date
Publication date
Application filed by ThyssenKrupp Stahl AG filed Critical ThyssenKrupp Stahl AG
Publication of EP1263993A1 publication Critical patent/EP1263993A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
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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
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • 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
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1222—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 by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1272—Final recrystallisation 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
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals
    • C21D3/04—Decarburising
    • 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
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1233—Cold rolling

Definitions

  • the invention relates to a method for producing non-grain oriented electrical sheet.
  • non-grain oriented electrical steel are listed here the DIN EN 10106 ("final annealed electrical sheet") and DIN EN 10165 (“non-final annealed electrical steel sheet”) covered electrical sheets understood. Beyond that also more anisotropic varieties included as long as they not to be considered grain-oriented electrical sheets.
  • Non-grain oriented electrical sheets in the thickness range of 0.65 to 1 mm for example, use in the Production of engines, each only for short Operating times are turned on.
  • Such engines are in the field of home appliances or used as auxiliary drives in motor vehicles.
  • Such engines should deliver high performance, whereas energy consumption is a subordinate one Role play.
  • a first method for producing Non-grain oriented hot rolled electrical steel is out DE 198 07 122 A1.
  • In the known method becomes one (in mass%) 0.001 to 0.1% C, 0.05 to 3.0% Si, to 0.85% A1, where% Si + 2A1 ⁇ 3.0%, and 0.5 - 2.0% Mn and the remainder iron and usual Impurities containing starting material directly from the Pouring heat or after reheating to one hot rolled at least 900 ° C. in the As part of the hot rolling are targeted two or more Forming stitches in the two-phase area austenite / ferrite carried out. In this way can be saved of time and energy if necessary cold-rolled and finally treated electrical steel produce, which compared to conventional sheets of this Kind has improved magnetic properties.
  • Non-grain oriented electrical sheet like her
  • a Vorbandes from a cast slab can also be thin slabs or direct used, cast pre-bands for generating Electrical sheets are used.
  • Cast tapes also have the option of To cast extremely thin tapes, the dimensions of which Approximated dimensions of the hot strip to be produced are.
  • the magnetic properties of the final product become through each of the individual in the making influenced processing steps. Therefore For example, when hot rolling the stitch sequence and the condition of each rolling pass in the hot strip existing structure depending on the Steel composition determined conversion behavior of the Steel above the temperature at the beginning of rolling and which was carried out between the individual rolling passes Cooling adjusted so that the desired magnetic Properties of the final product can be achieved. As well the properties of the final product are determined by the Annealing temperatures, the reel temperature and the Deformations in the course of cold rolling determined.
  • the object of the invention is a method specify with which in particular thicker Non-grain oriented electrical sheets cost-effective produce good magnetic properties have.
  • an austenite-forming Steel cast strip from the casting heat used directly rolled to a hot strip is used directly rolled to a hot strip.
  • the rolling conditions are during hot rolling chosen so that the complete Ferrite transformation not until the end of rolling is completed. Instead, at least the last stitch in the mixed area austenite / ferrite performed while all other stitches in austenite to be rolled.
  • Electro-plate tapes are produced whose thickness is so low is that she, without again to the thickness reduction cold rolled, delivered to the end user can be. Particularly good results can be achieved achieve a method according to the invention, if the Starting material as a cast thin slab or cast strip is produced and the hot rolling continuously on the Production of the starting material follows. So have hot tapes, in accordance with the invention from a on a Casting mill produced and continuously processed starting material are manufactured, excellent features.
  • the finished hot rolled and if necessary, cooled hot rolled strip. there the reel temperature is preferably at least 700 ° C.
  • a hot strip annealing all or at least be saved to a substantial extent.
  • the hot strip is already softened in the coil, with his Characteristics determining characteristics, such as grain size, Texture and excretions are positively affected.
  • the band using the coil heat of a passive Annealing is subjected.
  • Such from the coil heat "in-line" annealing performed at high temperature coiled, not significantly cooled in the coil Hot strip may otherwise fail completely replace required hot band bake annealing.
  • annealed hot strips with particularly good magnetic and technological properties produce.
  • the required time and Energy expenditure is considerably lower than with the conventionally for improving the properties of Electric sheet performed hot strip annealing.
  • the properties to be set can do this necessitate the tape following the reeling be subjected to an annealing.
  • the hot strip annealing in which form the hot strip annealing is performed can It may be beneficial to the annealing in a conventional manner under an oxygen-reduced atmosphere perform.
  • the Reeling at these temperatures leads to the to a solidified alloy Hot strip state.
  • total change in shape ⁇ h is understood to mean the ratio of the decrease in thickness during rolling in the respective phase region to the thickness of the strip when it enters the relevant phase region.
  • a hot strip produced according to the invention has, for example, a thickness h 0 after rolling in the austenite region. In the course of the subsequent rolling in the two-phase mixing zone, the thickness of the hot strip is reduced to h 1 .
  • the final annealing after pickling at one lower annealing temperature of at least 650 ° C carried out so is a non-annealed Get electrical tape, which if necessary one Final annealing can be subjected to the end user.
  • Both annealing treatments can, depending on the Peculiarities of the respective alloy, the desired Properties of the electric sheet and the available standing facilities, either in the hood furnace or in the Continuous furnace be performed.
  • Hot rolled strip can be improved by that the pickled hot strip at a degree of deformation of more than 3% to 15% temper rolling. Also this Nachwalzen does not lead to structural changes that would be comparable with the changes that occur during cold rolling because of This achieved high degrees of deformation usually targeted be brought about.
  • a further advantageous embodiment of the invention is characterized in that the hot rolling in the mixing area done with lubrication.
  • hot rolling with Lubrication occur on the one hand lower shear deformations so that the rolled strip results in a more homogeneous Structure over the cross section receives.
  • the rolling forces so that over the respective Walzstich a higher thickness decrease is possible.
  • the final thickness of the hot strip is 0.65 mm up to 1 mm. At low cost and consequently produced inexpensively marketable bands of this thickness a high demand.
  • the process according to the invention is particularly suitable for Processing of such steels, which has a Si content of have at most 1 wt .-%.
  • Such steels have a pronounced austenite phase, so that the transition from the austenite to the mixed phase austenite / ferrite can be controlled very precisely.
  • J2500 designate the magnetic polarization at magnetic field strengths of 2500 A / m, 5000 A / m and 10000 A / m, respectively.
  • P 1.0 or P 1.5 is the Loss of magnetization at a polarization of 1.0 T. or 1.5 T and a frequency of 50 Hz understood.
  • Magnetic properties are each on individual strips measured along the rolling direction.
  • compositions formed melts have been continuously cast in a continuous casting plant to each a pre-band, which has also been continuously fed into a multi-roll stand comprising hot rolling.
  • Tables 2a-2c show the magnetic properties J 2500 , J 5000 , J 10000 , P 1.0 and P 1.5 for each of three electrical sheets A1-A3 or B1-B3 produced from steels A and B, respectively.
  • the center of gravity of the deformation has been placed in each case in the area in which the respective strip was in the austenitic state.
  • austenite / ferrite only one rolling pass has been carried out.
  • the total deformation ⁇ H achieved here was less than 35%, in particular 30%.
  • Diagram 2 is logarithmic for the three According to the invention produced electrical sheets a, b, c and the conventionally produced sheet d of the respective Course of the specific loss of magnetization over the magnetic polarization has been applied.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Soft Magnetic Materials (AREA)
  • Cereal-Derived Products (AREA)
  • Metal Rolling (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Claims (25)

  1. Procédé de production de tôle magnétique à grains non orientés, laminée à chaud, dans lequel, au départ d'un matériau brut tel que brames coulées, feuillards, ébauches de feuillards ou brames minces, qui est produit en un acier contenant (en % en poids)
    C:
    0,0001 - 0,05 %
    Si:
    ≤ 1,5%
    Al:
    ≤0,5 %, avec [% Si] + 2[% Al] ≤ 1,8
    Mn:
    0,1 - 1,2 %
    A volonté jusqu'à 1,5 % en tout, des additifs d'alliage de P, Sn, Sb, Zr, V, Ti, N, Ni, Co, Nb et/ou B
    Solde fer de même que les impuretés habituelles,
    on lamine dans un train de finissage, à des températures supérieures à la température Ar1, un feuillard à chaud d'une épaisseur ≤ 1,5 mm, dans lequel au moins la dernière passe du laminage à chaud est réalisée dans une région mixte d'austénite/ferrite, et la déformation totale résultant du laminage dans le région mixte d'austénite/ferrite ∈H < 35 %.
  2. Procédé selon la revendication 1, caractérisé en ce que l'acier contient en tout jusqu'à 1,5 % d'additifs d'alliage de P, Sn, Sb, Zr, V, Ti, N, Ni, Co, Nb et/ou B.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le matériau brut est produit sous la forme d'une brame mince coulée ou d'un feuillard coulé, et en ce que le laminage à chaud suit en continu la production du matériau brut.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que le feuillard chaud est bobiné.
  5. Procédé selon la revendication 4, caractérisé en ce que la température de bobinage est d'au moins 700 °C.
  6. Procédé selon la revendication 5, caractérisé en ce que le feuillard chaud subit un recuit passif utilisant la chaleur de la bobine.
  7. Procédé selon la revendication 5, caractérisé en ce que le feuillard chaud est recuit après le bobinage.
  8. Procédé selon l'une des revendications 4 à 7, caractérisé en ce que le recuit du feuillard chaud est effectué sous une atmosphère d'oxygène réductrice.
  9. Procédé selon la revendication 4, caractérisé en ce que la température de bobinage est ≤ 600 °C.
  10. Procédé selon la revendication 9, caractérisé en ce que le feuillard chaud bobiné subit un refroidissement accéléré en bobine, immédiatement après le bobinage.
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que la déformation totale ∈H pendant le laminage dans la région mixte d'austénite/ferrite fait 10 % - 15 %.
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce que le feuillard chaud est décapé après bobinage.
  13. Procédé selon l'une des revendications précédentes, caractérisé en ce que le feuillard chaud est recuit à une température de recuit d'au moins 740 °C en un feuillard magnétique dont le recuit est final.
  14. Procédé selon la revendication 1 ou 12, caractérisé en ce que le feuillard chaud est recuit à une température de recuit d'au moins 650 °C en un feuillard magnétique à recuit non final.
  15. Procédé selon la revendication 13 ou 14, caractérisé en ce que le recuit est effectué dans un four à cloche.
  16. Procédé selon la revendication 13 ou 14, caractérisé en ce que le recuit est effectué dans un four continu.
  17. Procédé selon l'une des revendications précédentes, caractérisé en ce que le feuillard chaud subit un finissage et est livré sans avoir été laminé à froid.
  18. Procédé selon l'une des revendications 1 à 16, caractérisé en ce que le feuillard chaud subit un brunissage par laminage avec un degré de déformation ≤ 3 %.
  19. Procédé selon la revendication 18, caractérisé en ce que le feuillard bruni subit un finissage et est livré.
  20. Procédé selon l'une des revendications 1 à 16, caractérisé en ce que le feuillard chaud subit un dressage par laminage avec un degré de déformation > 3 % - 15 %.
  21. Procédé selon la revendication 20, caractérisé en ce que le feuillard dressé subit un finissage et est livré.
  22. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'épaisseur finale du feuillard chaud est de 0,65 à 1 mm.
  23. Procédé selon l'une des revendications précédentes, caractérisé en ce que le laminage à chaud dans la région mixte se fait avec lubrification.
  24. Procédé selon l'une des revendications précédentes, caractérisé en ce que la teneur en Si de l'acier est au plus de 1 % en poids.
  25. Procédé selon l'une des revendications 17, 19 ou 21, caractérisé en ce que la teneur en C de l'acier est supérieure à 0,005 % en poids et en ce que le feuillard chaud subit un recuit de décarburation avant son finissage et sa livraison
EP01933708A 2000-03-16 2001-03-15 Procede de fabrication de tole electrique a grains non orientes Expired - Lifetime EP1263993B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10012838 2000-03-16
DE10012838 2000-03-16
DE10015691 2000-03-29
DE10015691A DE10015691C1 (de) 2000-03-16 2000-03-29 Verfahren zum Herstellen von nichtkornorientiertem Elektroblech
PCT/EP2001/002974 WO2001068925A1 (fr) 2000-03-16 2001-03-15 Procede de fabrication de tole electrique a grains non orientes

Publications (2)

Publication Number Publication Date
EP1263993A1 EP1263993A1 (fr) 2002-12-11
EP1263993B1 true EP1263993B1 (fr) 2005-08-31

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EP01933708A Expired - Lifetime EP1263993B1 (fr) 2000-03-16 2001-03-15 Procede de fabrication de tole electrique a grains non orientes

Country Status (12)

Country Link
US (1) US6767412B2 (fr)
EP (1) EP1263993B1 (fr)
JP (1) JP5265835B2 (fr)
KR (1) KR100771253B1 (fr)
AT (1) ATE303454T1 (fr)
AU (1) AU2001260127A1 (fr)
BR (1) BR0109285A (fr)
DE (2) DE10015691C1 (fr)
ES (1) ES2248329T3 (fr)
MX (1) MXPA02008528A (fr)
PL (1) PL197691B1 (fr)
WO (1) WO2001068925A1 (fr)

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DE10153234A1 (de) * 2001-10-31 2003-05-22 Thyssenkrupp Stahl Ag Für die Herstellung von nichtkornorientiertem Elektroblech bestimmtes, warmgewalztes Stahlband und Verfahren zu seiner Herstellung
DE10221793C1 (de) * 2002-05-15 2003-12-04 Thyssenkrupp Electrical Steel Ebg Gmbh Nichtkornorientiertes Elektroband oder -blech und Verfahren zu seiner Herstellung
DE10253339B3 (de) * 2002-11-14 2004-07-01 Thyssenkrupp Stahl Ag Verfahren zum Herstellen eines für die Verarbeitung zu nicht kornorientiertem Elektroband bestimmten Warmbands, Warmband und daraus hergestelltes nicht kornorientiertes Elektroblech
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KR100721865B1 (ko) * 2005-12-19 2007-05-28 주식회사 포스코 자기적 특성이 우수한 무방향성 전기강판 및 그 제조방법
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US8333923B2 (en) * 2007-02-28 2012-12-18 Caterpillar Inc. High strength gray cast iron
JP5317552B2 (ja) * 2008-06-26 2013-10-16 オーエスジー株式会社 転造ダイス
JP5423629B2 (ja) * 2010-09-21 2014-02-19 新日鐵住金株式会社 磁束密度の高い無方向性電磁熱延鋼帯の製造方法
KR101917468B1 (ko) 2016-12-23 2018-11-09 주식회사 포스코 박물 열연 전기강판 및 그 제조방법
DE102017208146B4 (de) * 2017-05-15 2019-06-19 Thyssenkrupp Ag NO-Elektroband für E-Motoren
WO2020094230A1 (fr) 2018-11-08 2020-05-14 Thyssenkrupp Steel Europe Ag Bande ou tôle électrique pour applications de moteur électrique haute fréquence présentant une polarisation améliorée et de faibles pertes par inversion magnétique
DE102019216240A1 (de) * 2019-10-22 2021-04-22 Muhr Und Bender Kg Verfahren und Vorrichtung zur Herstellung eines nicht-kornorientierten Elektrobands
DE102021115174A1 (de) 2021-06-11 2021-11-11 Technische Universität Bergakademie Freiberg, Körperschaft des öffentlichen Rechts Verfahren zur Herstellung eines höherpermeablen, nichtkornorientierten Elektrobleches und dessen Verwendung

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Also Published As

Publication number Publication date
PL357413A1 (en) 2004-07-26
PL197691B1 (pl) 2008-04-30
EP1263993A1 (fr) 2002-12-11
ES2248329T3 (es) 2006-03-16
JP2003527483A (ja) 2003-09-16
JP5265835B2 (ja) 2013-08-14
DE10015691C1 (de) 2001-07-26
MXPA02008528A (es) 2004-05-17
US6767412B2 (en) 2004-07-27
US20030188805A1 (en) 2003-10-09
KR20030011794A (ko) 2003-02-11
DE50107281D1 (de) 2005-10-06
KR100771253B1 (ko) 2007-10-30
AU2001260127A1 (en) 2001-09-24
ATE303454T1 (de) 2005-09-15
BR0109285A (pt) 2002-12-17
WO2001068925A1 (fr) 2001-09-20

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