EP0786528B1 - Verfahren zum Herstellen nichtkornorientierter Elektrobleche und nach diesem Verfahren hergestellte Bleche - Google Patents

Verfahren zum Herstellen nichtkornorientierter Elektrobleche und nach diesem Verfahren hergestellte Bleche Download PDF

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Publication number
EP0786528B1
EP0786528B1 EP97400114A EP97400114A EP0786528B1 EP 0786528 B1 EP0786528 B1 EP 0786528B1 EP 97400114 A EP97400114 A EP 97400114A EP 97400114 A EP97400114 A EP 97400114A EP 0786528 B1 EP0786528 B1 EP 0786528B1
Authority
EP
European Patent Office
Prior art keywords
sheet
annealing
strip
cold
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97400114A
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English (en)
French (fr)
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EP0786528A1 (de
Inventor
Philippe Poiret
Jean-Claude Bavay
Jean Verdun
André Bertoni
Jacques Hernandez
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
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USINOR SA
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Filing date
Publication date
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Priority to EP04014453A priority Critical patent/EP1473371B1/de
Publication of EP0786528A1 publication Critical patent/EP0786528A1/de
Application granted granted Critical
Publication of EP0786528B1 publication Critical patent/EP0786528B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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
    • C21D8/1216—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
    • 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
    • C21D8/1261—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 following 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
    • C22C38/02—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
    • 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
    • H01F1/14775—Fe-Si based alloys in the form of sheets
    • 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
    • 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
    • C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment

Definitions

  • the present invention relates to a sheet metal manufacturing process of non-oriented grain magnetic steel.
  • Magnetic sheets called non-oriented grain, that is to say having isotropic magnetic properties are particularly intended for the construction of electromagnetic devices in which the magnetic flux generated by the electrical windings is not not constant, as for example in rotating machines. Certain transformers used in the household appliance sector use this type of sheet for economic reasons.
  • These electromagnetic devices are made of sheets cut and assembled.
  • the sheets have an efficiency that is evaluated in function of two parameters which are the induction, on the one hand, and the specific losses on the other hand.
  • the induction is limited by the saturation magnetization of the sheets and this magnetization is all the higher as the steel is rich in iron.
  • the addition of alloying elements in the steel leads to an increase in electrical resistivity, which has the function of reducing losses by eddy currents.
  • the vacuum production of steel improves on the one hand, the cleanliness and purity of said steel and secondly to reduce losses by hysteresis.
  • EP 0 469 980 discloses a process used in the field of manufacture of non-oriented grain magnetic sheets, the process comprising successively, after preparation under vacuum of a steel, hot rolling operation followed by coiling, annealing fast said to the parade of hot rolled sheet, an optional operation shot blasting, pickling operation, rolling operation cold in one or more stages followed by annealing, the final annealing being performed in a controlled atmosphere, decarburizing if necessary.
  • the sheets obtained by this process for a final thickness of 0.50 mm approximately, have specific losses less than 6.5 W / Kg under an induction of 1.5 Tesla and a frequency of 50 Hertz as well as a magnetization greater than 1.74 Tesla under a field 5000 A / m electric.
  • the losses total mass is less than 7.5 W / Kg under an induction of 1.5 Tesla and a frequency of 50 Hertz.
  • the magnetization is greater than 1.75 Tesla under a field of 5000 A / m.
  • the invention aims to improve the characteristics magnetic of non-oriented grain sheets made with steel containing very little silicon, i.e. reducing losses magnetic and increase the magnetization under an electric field determined.
  • the single figure shows a magnetization curve as a function cold rolling rates, cold rolling being performed in one single operation.
  • Example 1 illustrates the characteristics of the present invention.
  • Example 1 illustrates the characteristics of the present invention.
  • a steel slab No. 1 the chemical composition of which by weight is given in table 1, is reheated to 1200 ° C. then undergoes a first hot rolling with a reduction rate of 86% and a second hot rolling with a 93% reduction rate.
  • the temperature at the end of hot rolling is 860 ° C.
  • the strip of hot rolled sheet 2.5 mm thick is wound at the temperature of 710 ° C. (Steel # 1) VS mn Yes S al P 0.003% 0.308% 0.347% 0.010% 0.001% 0.160%
  • the sections undergo cold rolling in a single operation to obtain sections with a final thickness of 0.35 millimeters, 0.50 millimeter, 0.65 millimeter and 1 millimeter, which corresponds to cold reduction rate of 86%, 80%, 74% and 60%.
  • Final annealing is carried out at a temperature of 880 ° C. for 2 min for the 0.35 mm, 0.50 mm and 1 mm sheet sections thick.
  • Final annealing is carried out at a temperature of 920 ° C for 2.5 minutes (min) for the sections of sheet metal of final thickness of 0.65 mm.
  • Table 2 presents the mass loss characteristics in Watt / Kilogram at 1.5 Tesla and 50 Hertz and the magnetization in Tesla under an electric field of 5000 A / m for a sheet thickness of approximately 0.35 mm, d '' about 0.50 mm, about 0.65 mm and about 1 mm.
  • W 1.5 / 50 (W / kg) B5000 ( You're here ) 0.35 mm sheet with annealing (reference) 3.95 1.78 0.50 mm sheet with annealing. (reference) 4.70 1.78 0.65 mm sheet with annealing. (reference) 5.90 1.78 1 mm sheet with annealing (reference) 11.16 1.79 W 1.5 / 50 (W / kg) B5000 (You're here) Sheet without annealing. (invention) 0.35 mm thick sheet 4.10 1.75 Sheet 0.50 mm thick. 5.20 1.77 0.65 mm thick sheet. 6.72 1.77 1 mm thick sheet 9.60 1.76
  • the magnetizability of the sheet of final thickness of 1 mm, 0.65 mm and 0.50 mm is equal to or greater than 1.75 Tesla under a field of 5000 A / m when the thickness before rolling cold varies from 2 mm to 3.3 mm (as summarized in table 2a) in the case of winding of hot-rolled sheet at a temperature above 650 ° C and in the absence of annealing before cold rolling .
  • the thickness before cold rolling must be less than 3.3 mm to obtain a magnetization equal to or greater than 1.75 Tesla.
  • a slab of steel n ° 1 is hot rolled in the same way than in example 1, but with a winding at the temperature of 610 ° C, a section of the sheet being cold rolled with a rate of 80% reduction, the other section with a 74% reduction rate, without initial annealing, i.e. without annealing before cold rolling.
  • a slab of steel n ° 1 is hot rolled in the same way than in Example 1, but with a rolling end temperature at 910 ° C hot, the sheet being cold rolled with a reduction rate 80% without initial annealing.
  • a steel slab No. 2 the weight composition of which is given in Table 5, is treated under the same conditions as the steel slab No. 1 of Example 1, the sheet being cold rolled without initial annealing.
  • Step # 2 VS mn Yes S al P 0.003% 0.870% 0.342% 0.008% 0.001% 0.188%
  • a steel slab n ° 3 whose weight composition is given in table 7 is treated under the same conditions as the slab n ° 1 of example 1, the sheet being cold rolled without initial annealing. (Steel # 3) VS mn Yes S al P 0.003% 0.106% 0.326% 0.007% 0.001% 0.173%
  • the presence of silicon and manganese in solid solution in iron significantly increases the electrical resistivity and therefore decreases the energy losses which accompany the variation of the magnetic induction flux.
  • magnetic polarization at saturation decreases as a function of the content silicon, aluminum, manganese. This results in less magnetic permeability of steel at the usual operating point of machines. It is therefore necessary to find the best compromise between the content of alloying elements and the magnetic performance targeted. Consequently, the steel according to the invention has a mass content less than 0.5% silicon, and a manganese content less than 0.5% to obtain a high permeability.
  • Thermal conductivity is an important parameter in the construction of electrical machines. Indeed, the energy losses by Joule effect in the materials are evacuated outside by through the magnetic circuit made up of cut sheets stacked. The addition of silicon, manganese and aluminum in the iron results in a decrease in thermal conductivity.
  • the steel must be non or very little alloyed, the weak silicon, manganese and aluminum content of steel according to the invention makes it possible to limit the overheating of the motors which is detrimental to the good performance of the insulators coating the conductors.
  • the better removal of calories can also allow an increase mass power, via increased induction levels, without temperature increase.
  • composition of the invention by the thermal conductivity that it gives to steel, ensures thermal conduction cooling of electrical devices.
  • the sheet obtained by the process can be subjected, after cutting and assembly of magnetic circuits, annealing elimination of constraints.

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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)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Inorganic Insulating Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Soft Magnetic Materials (AREA)

Claims (5)

  1. Verfahren zum Herstellen eines nichtkornorientierten Magnetblechs aus einem unter Vakuum erzeugten Stahl mit der Zusammensetzung
       Kohlenstoff < 0,01 %
       Silizium < 0,5 %
       Mangan 0,05 - 0,5 %
       Aluminium < 0,03 %
       Phosphor < 0,20 %
       Schwefel < 0,015 %
       Stickstoff < 0,01 %
       Sauerstoff < 0,01 %
       wobei der Rest Eisen und unvermeidbaren Verunreinigungen sind,
    wobei der zu Brammen geformte Stahl nacheinander
    mit einer Brammenerwärmungstemperatur unter 1300°C und einer Warmwalzendtemperatur unter 950°C warmgewalzt wird, das warmgewalzte Band bei einer Temperatur über 550°C aufhaspelt wird, einer fakultativen Strahlbehandlung und einer Beizbehandlung unterworfen wird und dann mit einer Querschnittsreduktion von größer oder gleich 25 % in einem Arbeitsgang auf eine Dicke von kleiner oder gleich 1,5 mm kaltgewalzt wird und das kaltgewalzte Band schlussgeglüht wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Kaltwalzen in einem Arbeitsgang unter einer Querschnittsreduktion von 25 bis 90 % durchgeführt wird.
  3. Verfahren nach Anspruch 1 bis 2, dadurch gekennzeichnet, dass das anschließende Schlussglühen bei einer Temperatur zwischen 700 und 1050°C während weniger als 10 min durchgeführt wird.
  4. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, dass das vorher zugeschnittene Blech nach dem Schlussglühen zusätzlich spannungsarmgeglüht wird.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass das Spannungsarmglühen bei einer Temperatur über 650°C während mehr als 3 min durchgeführt wird.
EP97400114A 1996-01-25 1997-01-21 Verfahren zum Herstellen nichtkornorientierter Elektrobleche und nach diesem Verfahren hergestellte Bleche Expired - Lifetime EP0786528B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04014453A EP1473371B1 (de) 1996-01-25 1997-01-21 Verfahren zum Herstellen nicht kornorientierter Elektrobleche und nach diesem Verfahren hergestellte Bleche

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9600808A FR2744135B1 (fr) 1996-01-25 1996-01-25 Procede de fabrication de tole d'acier magnetique a grains non orientes et tole obtenue par le procede
FR9600808 1996-01-25

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP04014453A Division EP1473371B1 (de) 1996-01-25 1997-01-21 Verfahren zum Herstellen nicht kornorientierter Elektrobleche und nach diesem Verfahren hergestellte Bleche

Publications (2)

Publication Number Publication Date
EP0786528A1 EP0786528A1 (de) 1997-07-30
EP0786528B1 true EP0786528B1 (de) 2004-09-29

Family

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Application Number Title Priority Date Filing Date
EP04014453A Expired - Lifetime EP1473371B1 (de) 1996-01-25 1997-01-21 Verfahren zum Herstellen nicht kornorientierter Elektrobleche und nach diesem Verfahren hergestellte Bleche
EP97400114A Expired - Lifetime EP0786528B1 (de) 1996-01-25 1997-01-21 Verfahren zum Herstellen nichtkornorientierter Elektrobleche und nach diesem Verfahren hergestellte Bleche

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EP04014453A Expired - Lifetime EP1473371B1 (de) 1996-01-25 1997-01-21 Verfahren zum Herstellen nicht kornorientierter Elektrobleche und nach diesem Verfahren hergestellte Bleche

Country Status (5)

Country Link
EP (2) EP1473371B1 (de)
AT (2) ATE343651T1 (de)
DE (2) DE69736868T2 (de)
ES (2) ES2230591T3 (de)
FR (1) FR2744135B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1415008A1 (de) * 2001-08-11 2004-05-06 ThyssenKrupp Stahl AG Nichtkornorientiertes elektroblech oder -band und verfahren zu seiner herstellung
PL1752548T3 (pl) * 2005-08-03 2017-08-31 Thyssenkrupp Steel Europe Ag Sposób wytwarzania taśmy elektrotechnicznej o zorientowanych ziarnach
SI1752549T1 (sl) * 2005-08-03 2016-09-30 Thyssenkrupp Steel Europe Ag Postopek za proizvodnjo zrnato usmerjene magnetne jeklene vzmeti
IT1402624B1 (it) 2009-12-23 2013-09-13 Ct Sviluppo Materiali Spa Procedimento per la produzione di lamierini magnetici a grano orientato.
DE102013019787A1 (de) * 2013-11-27 2015-05-28 Valeo Schalter Und Sensoren Gmbh Verfahren zum Herstellen eines ferromagnetischen Bauteils für einen Drehmomentsensor einer Fahrzeuglenkwelle und Drehmomentsensor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1237481B (it) * 1989-12-22 1993-06-07 Sviluppo Materiali Spa Procedimento per la prodizione di lamierino magnetico semifinito a grano non orientato.
FR2665181B1 (fr) * 1990-07-30 1994-05-27 Ugine Aciers Procede de fabrication de tole d'acier magnetique a grains non orientes et tole obtenue par ce procede.
JPH04107216A (ja) * 1990-08-25 1992-04-08 Kobe Steel Ltd 無方向性電磁鋼板の製造方法
TW198734B (de) * 1990-12-10 1993-01-21 Kawasaki Steel Co
JP3348802B2 (ja) * 1993-06-30 2002-11-20 新日本製鐵株式会社 磁束密度が高く、鉄損の低い無方向性電磁鋼板の製造方法
CN1047207C (zh) * 1994-06-24 1999-12-08 新日本制铁株式会社 具有高磁通密度和低铁损的非取向电工钢片的制造方法

Also Published As

Publication number Publication date
DE69736868T2 (de) 2007-06-06
FR2744135A1 (fr) 1997-08-01
DE69736868D1 (de) 2006-12-07
ES2230591T3 (es) 2005-05-01
EP1473371A2 (de) 2004-11-03
EP1473371A3 (de) 2005-04-13
ES2276191T3 (es) 2007-06-16
EP1473371B1 (de) 2006-10-25
EP0786528A1 (de) 1997-07-30
ATE343651T1 (de) 2006-11-15
DE69730884D1 (de) 2004-11-04
ATE278041T1 (de) 2004-10-15
DE69730884T2 (de) 2005-11-17
FR2744135B1 (fr) 1998-02-27

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