EP1662010B1 - Warmgewalztes magnetisches Stahlband zur Herstellung von gestapelten magnetischen Kernblechen - Google Patents

Warmgewalztes magnetisches Stahlband zur Herstellung von gestapelten magnetischen Kernblechen Download PDF

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Publication number
EP1662010B1
EP1662010B1 EP04425877A EP04425877A EP1662010B1 EP 1662010 B1 EP1662010 B1 EP 1662010B1 EP 04425877 A EP04425877 A EP 04425877A EP 04425877 A EP04425877 A EP 04425877A EP 1662010 B1 EP1662010 B1 EP 1662010B1
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EP
European Patent Office
Prior art keywords
steel strip
hot rolled
strip according
magnetic steel
fact
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.)
Revoked
Application number
EP04425877A
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English (en)
French (fr)
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EP1662010A1 (de
Inventor
Giovanni Arvedi
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Individual
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Individual
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34932906&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1662010(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to AT04425877T priority Critical patent/ATE420214T1/de
Priority to PT04425877T priority patent/PT1662010E/pt
Priority to EP04425877A priority patent/EP1662010B1/de
Priority to SI200431016T priority patent/SI1662010T1/sl
Priority to RSP-2009/0056A priority patent/RS51272B/sr
Priority to ES04425877T priority patent/ES2316949T3/es
Priority to DE602004018942T priority patent/DE602004018942D1/de
Application filed by Individual filed Critical Individual
Priority to PL04425877T priority patent/PL1662010T3/pl
Priority to DK04425877T priority patent/DK1662010T3/da
Publication of EP1662010A1 publication Critical patent/EP1662010A1/de
Publication of EP1662010B1 publication Critical patent/EP1662010B1/de
Application granted granted Critical
Priority to HR20090096T priority patent/HRP20090096T3/xx
Revoked legal-status Critical Current
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
    • 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
    • C21D8/1238—Flattening; Dressing; Flexing
    • 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
    • C21D8/1222—Hot rolling
    • 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
    • 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
    • C21D2211/005—Ferrite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/14766—Fe-Si based alloys
    • H01F1/14791—Fe-Si-Al based alloys, e.g. Sendust

Definitions

  • the present invention relates to a low carbon hot rolled magnetic steel strip.
  • WO2004/013365 and EP1411138 disclose non-oriented grain magnetic strips provided with special chemical-physical features that, upon cold rolling and annealing treatment, render the same suitable to be used for producing, after cutting, lamination packs such as stators and rotors of electric motors.
  • the strip according to the present invention is preferably, although not exclusively, manufactured by means of in-line systems of the "thin-slab" type, like the one described in the international publication WO 2004/026497 in the name of the same applicant, as schematically represented in Fig.
  • the mean thickness is preferably of 0.65 - 1.0 mm with strict tolerances of ⁇ 0.05 mm, whereas the parallelism is preferably even less than 0.01 mm.
  • the hardness of the strip according to the present invention can reach values of HRB 55/70 or HV110/140.
  • the particular roughness ⁇ 1.3 ⁇ m of the strip is helpful to prevent the cut pieces from closely joining together when packed to form a multilayer, thanks to the air being present in the gaps caused by the roughness, and in general the above-described features make this type of hot rolled strip particularly suitable to a fine cutting without any need of having to trim and straighten the cut pieces, thereby rendering them ready for the subsequent packing steps, which in general are carried out in-line and automatically, thus eliminating the trimming and straightening operations which are required in the traditional systems.
  • the magnetic strip according to the present invention can replace, without annealing treatment, the cold rolled strips for producing, upon cutting, lamination packs of magnetic sheets.
  • the thickness of said steel strip is of 0.65-1.5 mm, preferably 0.65-1.0 mm with strict tolerances of ⁇ 0.05 mm and parallelism rate ⁇ 0.02, preferably 0.01 mm.
  • the strip according to the prior art is characterized by a silicon content > 0.5 % and a ferritic grain with fineness lower than grade 7 of ASTM E 112 standard to enhance the magnetic permeability
  • the strip according to the invention shows magnetic features comparable with those of non-oriented grain silicon-based strips being hot rolled and subsequently annealed to increase the size of the ferritic grain. This appears to be due to the substantial uniformity of the ferritic grain, wherein the 70% of the grains show a fineness grade comprised between levels 9 and 12 of the above-mentioned ASTM standard, thus rendering particularly permeable the magnetism of the same strip.
  • the grain size plays a basic role concerning the magnetic permeability of the steel, experimental tests have in fact shown that in this respect the feature of the grain uniformity is also very important, irrespective of its size.
  • the feature of uniformity of the ferritic grain which is fine and particularly homogeneous, descends also in particular from the microphotograph magnified one thousand times as represented in figure 2 .
  • packing factor which is defined as a ratio between the weight of a multilayer packet of regular shape (P) and that of a solid steel block having the same size (P').
  • P weight of a multilayer packet of regular shape
  • P' solid steel block having the same size
  • the strip according to the present invention is produced in a plant such as the one schematically illustrated in figure 5 , for the continuous hot rolling, such as of the type being the object of publication WO2004/026497 , from which the strip according to the present invention can be obtained with the above indicated features.
  • the lower portion of the lay-out relates to the possible operations of pickling and skinpassing to which the strip from the rolling step can be subjected, thus being able to reach hardness values corresponding to HRB 55/70 or HV 110/140.
  • Table 1 Table 1 W1T W 1.5T B2500 B5000 B10000 Strip according to the invention State: Raw (Cycle 1) 9.76 20.60 1.581 1.705 1.818 Strip of the Prior Art State: Annealed (Cycle 2) 10.20 21.61 1.590 1.713 1.829 Wherein:
  • the manufacturing of the magnetic strip according to the invention is more economical with respect to that according to the prior art both for addition of less quantities of silicon and for the elimination of the cold rolling and annealing steps, as already remarked above. This saving can reach a value corresponding to about an amount of 15% of the total manufacturing costs.
  • Another advantage of the steel according to the invention is that of avoiding the critical state of the traditional non-oriented grain silicon steel, the slabs of which must be heated at temperatures higher (by about 200°C) than requested by the other steels which do not include silicon and must be cooled more slowly with a controlled process before the subsequent rolling step to avoid cracks on the slab itself.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Soft Magnetic Materials (AREA)
  • Hard Magnetic Materials (AREA)

Claims (7)

  1. Ein warmgewalztes magnetisches Stahlband, geeignet zum Herstellen von Elektrostahlblech, mit einer Stärke zwischen 0,65 und 1,0 mm und einer feinen Kornstruktur, dadurch gekennzeichnet, daß es einen Siliziumgehalt < 0,03% hat, eine Parallelität < 0,02 mm hat, und daß 70% der ferritischen Körner zwischen Grade 9 und Grade 12 des ASTM-E-112-Standards liegen, wobei diese Merkmale ohne irgendwelche zusätzlichen Schritte des Glühens und Kaltwalzens erhalten werden, mit der folgenden Zusammensetzung: C ≤ 0,06%, Mn 0,10 ÷ 0,20%, Si < 0,03%, P ≤ 0,010%, S ≤ 0,005%, Cr ≤ 0,10%, Ni ≤ 0,12%, Mo ≤ 0,03%, A1 0,030 ± 0,050%, wobei der Rest Fe und unvermeidbare Verunreinigungen sind.
  2. Ein warmgewalztes magnetisches Stahlband nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens 80% der ferritischen Körner eine geringere Größe als diejenige entsprechend Grade 9 des besagten Standards haben.
  3. Ein warmgewalztes magnetisches Stahlband gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß es Maßabweichungen hat, die ± 0,05 mm entsprechen.
  4. Ein warmgewalztes magnetisches Stahlband gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß es eine Parallelität < 0,01 mm aufweist.
  5. Ein warmgewalztes magnetisches Stahlband nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß es weiter eine Rauigkeit ≥ 1,3 µm aufweist.
  6. Ein warmgewalztes magnetisches Stahlband nach den Ansprüchen 4 und 5, gekennzeichnet durch einen Packfaktor (P/P') ≥ 0,90.
  7. Ein warmgewalztes magnetisches Stahlband nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß es, nach Beizen und Kaltnachwalzen, Härtewerte von HRB 55/70 oder HV 110/140 aufweist.
EP04425877A 2004-11-24 2004-11-24 Warmgewalztes magnetisches Stahlband zur Herstellung von gestapelten magnetischen Kernblechen Revoked EP1662010B1 (de)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DE602004018942T DE602004018942D1 (de) 2004-11-24 2004-11-24 Warmgewalztes magnetisches Stahlband zur Herstellung von gestapelten magnetischen Kernblechen
EP04425877A EP1662010B1 (de) 2004-11-24 2004-11-24 Warmgewalztes magnetisches Stahlband zur Herstellung von gestapelten magnetischen Kernblechen
SI200431016T SI1662010T1 (sl) 2004-11-24 2004-11-24 Magnetni toplo valjani jekleni trak, predvsem uporaben za izdelavo elektromagnetnih lamelnih paketov
PL04425877T PL1662010T3 (pl) 2004-11-24 2004-11-24 Walcowana na gorąco taśma ze stali magnetycznej, szczególnie nadająca się do produkcji elektromagnetycznych elementów uwarstwionych
ES04425877T ES2316949T3 (es) 2004-11-24 2004-11-24 Chapa de acero megnetico laminada en caliente particularmente adecuada para la fabricacion de paquetes de chapas electromagneticas.
PT04425877T PT1662010E (pt) 2004-11-24 2004-11-24 Banda de aço magnética laminada a quente particularmente apropriada para a produção de pactotes de laminação electromagnética
AT04425877T ATE420214T1 (de) 2004-11-24 2004-11-24 Warmgewalztes magnetisches stahlband zur herstellung von gestapelten magnetischen kernblechen
RSP-2009/0056A RS51272B (sr) 2004-11-24 2004-11-24 Toplo valjane magnetne čelične trake posebno pogodne za proizvodnju elektromagnetnih slojevitih paketa
DK04425877T DK1662010T3 (da) 2004-11-24 2004-11-24 Magnetisk varmvalset st lb nd, som er s rligt velegnet til fremstilling af elektromagnetiske udvalsede pakker
HR20090096T HRP20090096T3 (en) 2004-11-24 2009-02-16 Magnetic hot rolled steel strip particularly suited for the production of electromagnetic lamination packs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425877A EP1662010B1 (de) 2004-11-24 2004-11-24 Warmgewalztes magnetisches Stahlband zur Herstellung von gestapelten magnetischen Kernblechen

Publications (2)

Publication Number Publication Date
EP1662010A1 EP1662010A1 (de) 2006-05-31
EP1662010B1 true EP1662010B1 (de) 2009-01-07

Family

ID=34932906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425877A Revoked EP1662010B1 (de) 2004-11-24 2004-11-24 Warmgewalztes magnetisches Stahlband zur Herstellung von gestapelten magnetischen Kernblechen

Country Status (10)

Country Link
EP (1) EP1662010B1 (de)
AT (1) ATE420214T1 (de)
DE (1) DE602004018942D1 (de)
DK (1) DK1662010T3 (de)
ES (1) ES2316949T3 (de)
HR (1) HRP20090096T3 (de)
PL (1) PL1662010T3 (de)
PT (1) PT1662010E (de)
RS (1) RS51272B (de)
SI (1) SI1662010T1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2636652A1 (en) * 2006-01-26 2007-08-02 Giovanni Arvedi Hot rolled dual phase steel strip having features of a cold rolled strip
AU2006336817B2 (en) * 2006-01-26 2011-10-06 Giovanni Arvedi Hot steel strip particularly suited for the production of electromagnetic lamination packs
DE102008029581A1 (de) * 2007-07-21 2009-01-22 Sms Demag Ag Verfahren und Vorrichtung zum Herstellen von Bändern aus Silizum-Stahl oder Mehrphasenstahl
ITRM20110528A1 (it) 2011-10-05 2013-04-06 Ct Sviluppo Materiali Spa Procedimento per la produzione di lamierino magnetico a grano orientato con alto grado di riduzione a freddo.
CN103028599B (zh) * 2012-05-25 2014-11-05 宝钢集团新疆八一钢铁有限公司 一种用于热轧带肋钢筋钢盘条的生产方法
JP6194866B2 (ja) * 2014-08-27 2017-09-13 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
CN107962075B (zh) * 2017-11-27 2019-07-09 武汉钢铁有限公司 高牌号无取向硅钢热轧酸洗不剪边的冷轧方法
CN109097535B (zh) * 2018-09-27 2021-11-05 长春工业大学 一种基于累积叠轧焊制备高强度无取向硅钢的方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3366843B2 (ja) * 1997-09-19 2003-01-14 川崎製鉄株式会社 超微細粒を有する加工用熱延鋼板及びその製造方法
JP3514158B2 (ja) * 1999-03-19 2004-03-31 Ｊｆｅスチール株式会社 伸びフランジ加工性と材質安定性に優れた高張力熱延鋼板の製造方法
JP2001073096A (ja) * 1999-09-01 2001-03-21 Sumitomo Metal Ind Ltd パワーステアリングモータ用無方向性電磁鋼板およびその製造法
WO2001023632A1 (fr) * 1999-09-28 2001-04-05 Nkk Corporation Tole d'acier laminee a chaud et possedant une resistance elevee a la traction, et procede de production associe
JP2001192788A (ja) * 2000-01-12 2001-07-17 Sumitomo Metal Ind Ltd 加工性の優れた無方向性電磁鋼板とその製造方法
US20040149355A1 (en) 2001-06-28 2004-08-05 Masaaki Kohno Nonoriented electromagnetic steel sheet
JP4718749B2 (ja) 2002-08-06 2011-07-06 Ｊｆｅスチール株式会社 回転機用高磁束密度無方向性電磁鋼板及び回転機用部材
ITMI20021996A1 (it) 2002-09-19 2004-03-20 Giovanni Arvedi Procedimento e linea di produzione per la fabbricazione di nastro a caldo ultrasottile sulla base della tecnologia della bramma sottile

Also Published As

Publication number Publication date
HRP20090096T3 (en) 2009-05-31
EP1662010A1 (de) 2006-05-31
DE602004018942D1 (de) 2009-02-26
PT1662010E (pt) 2009-03-03
DK1662010T3 (da) 2009-04-27
ES2316949T3 (es) 2009-04-16
PL1662010T3 (pl) 2009-06-30
SI1662010T1 (sl) 2009-04-30
RS51272B (sr) 2010-12-31
ATE420214T1 (de) 2009-01-15

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