EP1056890B1 - Procede pour la production de tole electrique a grains non orientes - Google Patents

Procede pour la production de tole electrique a grains non orientes Download PDF

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Publication number
EP1056890B1
EP1056890B1 EP99910250A EP99910250A EP1056890B1 EP 1056890 B1 EP1056890 B1 EP 1056890B1 EP 99910250 A EP99910250 A EP 99910250A EP 99910250 A EP99910250 A EP 99910250A EP 1056890 B1 EP1056890 B1 EP 1056890B1
Authority
EP
European Patent Office
Prior art keywords
process according
hot
strip
rolling
annealing
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
EP99910250A
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German (de)
English (en)
Other versions
EP1056890A1 (fr
Inventor
Hans Pircher
Rudolf Kawalla
Manfred Espenhahn
Brigitte Hammer
Klaus Peters
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
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 ThyssenKrupp Stahl AG filed Critical ThyssenKrupp Stahl AG
Publication of EP1056890A1 publication Critical patent/EP1056890A1/fr
Application granted granted Critical
Publication of EP1056890B1 publication Critical patent/EP1056890B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C21D8/1205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular fabrication or treatment of ingot or slab
    • 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
    • C21D8/1266—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 between cold rolling steps
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • B21B2201/00—Special rolling modes
    • B21B2201/16—Two-phase or mixed-phase 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
    • C21D2211/001—Austenite
    • 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
    • C21D8/1205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular fabrication or treatment of ingot or slab
    • C21D8/1211—Rapid solidification; Thin strip casting
    • 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 made of slab or Thin slab casting with low magnetic loss and high polarization as well as good mechanical Characteristics.
  • non-grain oriented electrical sheet is one according to DIN 10106 (finally annealed) or 10165 (not finally annealed) understood.
  • more anisotropic varieties are also used included as long as they are not as grain-oriented Electrical sheet apply (magnetization loss anisotropy up to about 30%). This material mainly takes place Use as core material in machines (engines, Generators) with rotating magnetic flow direction.
  • Un-, low- and medium-silicated are considered here low loss varieties with high polarization.
  • Such tape is especially as a core material for Ballasts and in high-efficiency motors, for Railway motors, industrial drives for pumps and compressors, Servo drives and drives for household technology suitable.
  • WO 96/00306 describes steels with the main alloying elements Silicon, manganese and aluminum proposed the hot strip for electrical sheet in Finishing the austenite area and coiling Temperatures above full conversion to To make ferrite. It is also a direct one Annealing the coil from the rolling heat provided. On this Weg becomes an end product with good magnetic Get properties. However, because of the high energy expenditure when heating before hot rolling and increased during hot rolling and due to the alloy additives Costs are accepted.
  • EP 0 469 980 B1 calls for increased reel temperatures in Combination with an additional hot strip annealing. It become usable even with low alloy contents magnetic properties set. Indeed requires a higher reel temperature and that additional hot strip annealing increased energy and thus Expense.
  • the higher silicon and aluminum contents (Si + 2 Al ⁇ 2%) directed EP 0 511 601 B1 sees one Hot strip annealing at a particularly high temperature above from 1000 ° C. This means expensive alloying elements used and very high temperatures at a additional annealing of the hot strip can be applied.
  • the invention is based on the object inexpensive way of using an electrical sheet for that different application areas suitable combination of high polarization, low magnetic loss and good mechanical properties.
  • the steel melts used for this contain 0.001 to 0.1% C, 0.05 to 3.0% Si, to 0.85% Al with Si + 2 Al ⁇ 3.0%, 0.05 to 2.0% Mn, balance iron and usual accompanying elements as well as alloy additives on P, Sn, N, Ni, Co, Ti, Nb, Zr, V, B, Sb up to a total of 1.5%.
  • a In continuous slab casting, a usually takes place Reheat to at least 900 ° C so austenite forms and the finish rolling according to the invention in ⁇ / ⁇ two-phase area can take place.
  • the material is usually thin slabs or tape using the pouring heat from the above Grounding before finish rolling also at least Heated 900 ° C.
  • Thin slab or strip casting offer compared to conventional slab casting following additional Advantages: Due to the shorter cooling time until Solidification reduces the dendrite arm spacing and therefore fewer increases, the material is becoming more homogeneous. Due to the smaller slab thickness and the ability to take advantage of the pouring heat will Hot strip rolling is shortened and cost savings reached. With a corresponding interpretation of the Thin slab caster are a wider range of Final rolling and coiling temperature and lower hot strip thicknesses adjustable. With small hot strip thicknesses ⁇ 1.5 mm can hot rolling with finish rolling speeds of over 10 m / s take place in order to maintain high productivity.
  • roller lubrication in at least one of the last three hot rolling passes of finish rolling due to less shear deformation By roller lubrication in at least one of the last three hot rolling passes of finish rolling due to less shear deformation, a more homogeneous one Structure can be obtained across the cross section. Since also the rolling force is reduced is higher Thickness reduction to lower final thicknesses possible.
  • a limitation of the Si content of the steel to 0.05 to 1.6% Si is appropriate if otherwise at corresponding proportions of other components of the Composition no longer has a two-phase area.
  • the steel slab is drawn directly from the pouring heat Temperatures cooled below 900 ° C and after one Reheating hot rolled to the austenite area, see above gross excretions are formed. Different from finer ones Excretions can be such coarse excretions better magnetic properties of the electrical sheet to lead. The latter applies in particular if the Reheating temperature is a maximum of 1150 ° C. At a such a low temperature is prevented the previously formed coarse excretions dissolve.
  • the hot strip produced up to 6 mm thick is dependent of the intended use at reel temperatures either below 650 ° C or in the range from 650 ° C to Ar1 coiled. If the tapes at high temperatures the coils can then either cooled to room temperature in still air or can be heat-treated directly from the coil heat.
  • the Heat treatment can be delayed by cooling under a hood with a cooling rate from a maximum of 100 ° C / h down to 600 ° C or through hot use in an oven.
  • the oven temperature is also above the reel temperature.
  • Reel temperatures between 650 ° C and that with the Alloy proportions varying Ar1 temperature can replace all or part of hot strip annealing.
  • a short distance to the reel, for example of 40 m and including in combination with high final rolling speeds makes high, especially in a casting and rolling mill conventional rolling mills, especially on small ones Strip thicknesses, not adjustable, reel temperatures possible.
  • the improvement of magnetic Properties with the inventive method compared to the conventional process is with a time and energy saving at Generation of the electrical sheet connected.
  • the hot strip can be annealed beforehand.
  • Table 1 shows magnetic property values, magnetic loss (P) and polarization (J) which have been achieved by a conventional method and by the method according to the invention.
  • alloy product [mm] conventional process inventive method P 1.0 / W / kg P 1.5 / W / kg J 2500 / T P 1.0 / W / kg P 1.5 / W / kg J 2500 / T Ar 3 / ° C Ar 1 / ° C 0.15% Si 0.1% Al 0.35% Mn sf: 0.65 2.41 6.03 1,633 2.38 5.99 1,662 915 845 2.32 5.93 1,656 0.60% Si 0.25% Al 0.25% Mn ff: 0.5 with WBG 2.37 5.2 1.68 2.32 5.01 1,692 1050 945 2.28 4.95 1,690 1.3% Si 0.12% Al 0.2% Mn ff: 0.5 2.62 5.74 1,623 2.13 4.55 1,668 1050 965 2.52 5.41 1,651 2.53 5.44 1,647 ff: 0.5 with WBG
  • the examples show the improvement which can be achieved by using the method according to the invention on the one hand for semi finished (sf) and on the other hand for fully finished (ff) standard grades without hot strip annealing and with a conventional hot strip annealing (WBG).
  • WBG hot strip annealing
  • J polarization values
  • P magnetic reversal losses

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Soft Magnetic Materials (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Claims (19)

  1. Procédé pour la fabrication de feuillard à chaud pour la production de tôle électrique à grains non orientés à partir de coulée continue dans des brames, de brames minces ou de feuillard à base d'un acier avec (en pourcent de masse) :
    0,001 à 0,1% de C
    0,05 à 3,0% de Si
       à 0,85% de Al avec Si + 2 Al ≤ 3,0%
    0,05 à 2,0% de Mn
       le reste du fer, et des éléments d'accompagnement classiques et des additifs d'alliage de P, Sn, N, Ni, Co, Ti, Nb, Zr, V, B, Sb à globalement 1,5%,
       caractérisé en ce que les brames d'acier sont laminées à chaud directement à partir de la chaleur de coulée ou après un réchauffement jusqu'à T ≥ 900°C et que deux passes de formage ou plus sont effectuées dans la zone à deux phases austénite/ferrite dans le cadre du laminage final.
  2. Procédé selon la revendication 1, caractérisé en ce qu'au moins la dernière passe de formage du laminage final avec un changement de forme supérieure à 10% se situe à la fin du processus de laminage à chaud dans la zone de ferrite.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que l'acier contient 0,05 à 1,6% de Si.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la température de réchauffement des brames d'acier se situe dans la zone d'austénite.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les brames d'acier sont refroidies directement à partir de la chaleur de coulée à des températures inférieures à 900°C et sont laminées à chaud après un réchauffement jusque dans la zone d'austénite.
  6. Procédé selon la revendication 5, caractérisé en ce que la température de réchauffement est au maximum de 1150°C.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins l'une des trois dernières passes de laminage à chaud du laminage final est effectuée avec graissage des cylindres.
  8. Procédé selon la revendication 7, caractérisé en ce que la dernière passe du laminage final est exécutée dans la zone de ferrite avec graissage des cylindres.
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que feuillard à chaud est bobiné à une température située dans la plage de 650°C à Ar1.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le feuillard à chaud est recuit à une température située dans la plage de 650°C à Ar3.
  11. Procédé selon la revendication 10, caractérisé en ce que le feuillard à chaud est recuit directement après le bobinage sur la bobine.
  12. Procédé selon la revendication 10, caractérisé en ce que le feuillard à chaud est refroidi pour commencer et est réchauffé pour le recuit.
  13. Procédé selon la revendication 10, caractérisé en ce que le feuillard à chaud est recuit en ligne à partir de la chaleur de laminage.
  14. Procédé selon la revendication 10, caractérisé en ce que le feuillard bobiné est refroidi jusqu'à 600°C sous un revêtement à cloche avec une vitesse maximale de 100°C/h.
  15. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le feuillard à chaud est bobiné à des températures inférieures à 650°C.
  16. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le feuillard à chaud est traité ultérieurement par un laminage à une étape ou plusieurs étapes éventuellement avec un recuit intermédiaire.
  17. Procédé pour la fabrication d'une tôle électrique avec recuit final selon l'une quelconque des revendications 1 à 16, caractérisé en ce que le feuillard laminé à chaud et à froid subit un recuit final sous gaz protecteur au-dessus de 650°C.
  18. Procédé pour la fabrication d'une tôle électrique sans recuit final selon l'une quelconque des revendications 1 à 16, caractérisé en ce que le feuillard laminé à chaud ou laminé à chaud et à froid est recuit avec recristallisation dans un four de recuit à cloche ou un four de recuit continu sous gaz protecteur puis redressé ou passé au laminoir à dresser.
  19. Procédé selon la revendication 17 ou 18, caractérisé en ce que le feuillard est recuit avec décarburation avant le recuit final.
EP99910250A 1998-02-20 1999-02-20 Procede pour la production de tole electrique a grains non orientes Expired - Lifetime EP1056890B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19807122 1998-02-20
DE19807122A DE19807122C2 (de) 1998-02-20 1998-02-20 Verfahren zur Herstellung von nichtkornorientiertem Elektroblech
PCT/EP1999/001123 WO1999042626A1 (fr) 1998-02-20 1999-02-20 Procede pour la production de tole electrique a grains non orientes

Publications (2)

Publication Number Publication Date
EP1056890A1 EP1056890A1 (fr) 2000-12-06
EP1056890B1 true EP1056890B1 (fr) 2001-08-29

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EP99910250A Expired - Lifetime EP1056890B1 (fr) 1998-02-20 1999-02-20 Procede pour la production de tole electrique a grains non orientes

Country Status (12)

Country Link
US (1) US6503339B1 (fr)
EP (1) EP1056890B1 (fr)
JP (1) JP2002504624A (fr)
KR (1) KR100605139B1 (fr)
AT (1) ATE204917T1 (fr)
AU (1) AU2927699A (fr)
BR (1) BR9908106A (fr)
CA (1) CA2320124A1 (fr)
DE (2) DE19807122C2 (fr)
ES (1) ES2163329T3 (fr)
PL (1) PL186500B1 (fr)
WO (1) WO1999042626A1 (fr)

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DE19930518C1 (de) * 1999-07-05 2000-10-12 Thyssenkrupp Stahl Ag Verfahren zum Herstellen von nicht kornorientiertem Elektroblech
DE10015691C1 (de) 2000-03-16 2001-07-26 Thyssenkrupp Stahl Ag Verfahren zum Herstellen von nichtkornorientiertem Elektroblech
IT1316030B1 (it) * 2000-12-18 2003-03-26 Acciai Speciali Terni Spa Procedimento per la fabbricazione di lamierini a grano orientato.
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
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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
CN100529115C (zh) * 2004-12-21 2009-08-19 株式会社Posco 具有优良磁性的无取向电工钢板及其制造方法
KR101428442B1 (ko) 2009-10-28 2014-08-07 신닛테츠스미킨 카부시키카이샤 Ｆｅ계 금속판
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WO2016063098A1 (fr) * 2014-10-20 2016-04-28 Arcelormittal Procédé de production de tôle d'acier au silicium à grains non orientés contenant de l'étain, tôle d'acier obtenue et son utilisation
EP3303647B1 (fr) * 2015-06-03 2019-03-20 Salzgitter Flachstahl GmbH Composant formé à chaud en acier galvanisé, procédé de fabrication de celui-ci et procédé de fabrication d'une bande d'acier appropriée au formage à chaud de composants
CN109890994A (zh) 2016-10-27 2019-06-14 杰富意钢铁株式会社 无取向性电磁钢板及其制造方法
KR101917468B1 (ko) * 2016-12-23 2018-11-09 주식회사 포스코 박물 열연 전기강판 및 그 제조방법
JP6665794B2 (ja) * 2017-01-17 2020-03-13 Ｊｆｅスチール株式会社 無方向性電磁鋼板およびその製造方法
KR102109240B1 (ko) * 2017-12-24 2020-05-11 주식회사 포스코 무방향성 전기강판용 열연강판, 무방향성 전기강판 및 그 제조방법
KR102045653B1 (ko) * 2017-12-26 2019-11-15 주식회사 포스코 재질과 두께의 편차가 작은 무방향성 전기강판 및 그 제조방법
KR102139649B1 (ko) * 2018-09-27 2020-07-30 주식회사 포스코 무방향성 전기강판의 제조방법
KR102164113B1 (ko) * 2018-11-29 2020-10-13 주식회사 포스코 낮은 철손 및 우수한 표면품질을 갖는 무방향성 전기강판 및 그 제조방법
CN110106447B (zh) * 2019-04-28 2020-09-29 首钢智新迁安电磁材料有限公司 一种高磁感无取向电工钢及其制备方法
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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US6503339B1 (en) 2003-01-07
EP1056890A1 (fr) 2000-12-06
CA2320124A1 (fr) 1999-08-26
JP2002504624A (ja) 2002-02-12
AU2927699A (en) 1999-09-06
KR20010040966A (ko) 2001-05-15
PL342361A1 (en) 2001-06-04
ATE204917T1 (de) 2001-09-15
DE59900223D1 (de) 2001-10-04
WO1999042626A1 (fr) 1999-08-26
ES2163329T3 (es) 2002-01-16
BR9908106A (pt) 2000-10-31
KR100605139B1 (ko) 2006-07-28
DE19807122A1 (de) 1999-09-09
DE19807122C2 (de) 2000-03-23
PL186500B1 (pl) 2004-01-30

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