EP0786528B1 - Procédé de fabrication de tôle d'acier magnétique à grains non orientés et tôle obtenue par le procédé - Google Patents
Procédé de fabrication de tôle d'acier magnétique à grains non orientés et tôle obtenue par le procédé Download PDFInfo
- 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
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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)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Power Engineering (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Inorganic Insulating Materials (AREA)
- Soft Magnetic Materials (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
- un laminage à chaud avec une température de réchauffage de brame inférieure à 1300°C, une température de fin de laminage à chaud inférieure à 950°C, la bande laminée à chaud étant bobinée à une température supérieure à 550°C,
- une opération facultative de grenaillage,
- une opération de décapage,
- le laminage à froid en une opération est réalisé sous un taux de réduction compris entre 25 et 90%.
- le recuit final au défilé est réalisé à une température comprise entre 700 et 1050 °C pendant un temps inférieur à 10 mn.
- le recuit d'élimination des contraintes est effectué à une température supérieure à 650 °C pendant un temps supérieur à 3 mn.
- un laminage à chaud avec une température de réchauffage de brame inférieure à 1300°C, une température de fin de laminage à chaud inférieure à 950°C, la bande laminée à chaud étant bobinée à une température supérieure à 550°C, puis laminée à froid avec un taux de réduction supérieur ou égal à 25 %, en une opération de laminage à froid à une épaisseur inférieure ou égale à 1,5 mm, la bande laminée à froid étant soumise à un recuit final.
( Acier n°1 ) | |||||
C | Mn | Si | S | Al | P |
0,003% | 0,308% | 0,347% | 0,010% | 0,001% | 0,160% |
- une partie des tronçons subissent un recuit rapide de 2,5 minutes à 1050°C avant laminage à froid pour servir de référence.
- les autres tronçons sont selon l'invention, laminés à froid sans effectuer de recuit avant le laminage à froid.
W 1,5/50 ( W/kg ) | B5000 ( Tesla ) | |
Tôle de 0,35 mm avec recuit ( référence ) | 3,95 | 1,78 |
Tôle de 0,50 mm avec recuit. ( référence) | 4,70 | 1,78 |
Tôle de 0,65 mm avec recuit. ( référence ) | 5,90 | 1,78 |
Tôle de 1 mm avec recuit ( référence) | 11,16 | 1,79 |
W 1,5/50 (W/kg) | B5000 (Tesla) | |
Tôle sans recuit. ( invention ) | ||
Tôle de 0,35 mm d'épaisseur | 4,10 | 1,75 |
Tôle de 0,50 mm d'épaisseur. | 5,20 | 1,77 |
Tôle de 0,65 mm d'épaisseur. | 6,72 | 1,77 |
Tôle de 1 mm d'épaisseur | 9,60 | 1,76 |
Epaisseur finale ( mm ) | Epaisseur avant laminage à froid ( mm ) | B 5000 ( Tesla ) |
1 | 3,3 | 1,77 |
- | 2,5 | 1,76 |
- | 2 | 1,77 |
0,65 | 3,3 | 1,77 |
- | 2,5 | 1,77 |
- | 2 | 1,78 |
0,50 | 3,3 | 1,75 |
- | 2,5 | 1,77 |
- | 2 | 1,77 |
0,35 | 3,3 | 1,74 |
- | 2,5 | 1,75 |
- | 2 | 1,76 |
W 1,5/ 50 | B5000 | |
( W/kg ) | ( Tesla ) | |
Tôle sans recuit. ( invention ) | ||
Tôle de 0,50 mm d'épaisseur. | 5,95 | 1,74 |
Tôle de 0,65 mm d'épaisseur. | 7,67 | 1,74 |
W 1,5/ 50 | B5000 | |
( W/kg ) | ( Tesla ) | |
Tôle sans recuit. ( invention ) | ||
Tôle de 0,50 mm d'épaisseur. | 5,25 | 1,72 |
( Acier n°2 ) | |||||
C | Mn | Si | S | Al | P |
0,003% | 0,870% | 0,342% | 0,008% | 0,001% | 0,188% |
W 1,5/ 50 | B5000 | |
( W/kg ) | ( Tesla ) | |
Tôle sans recuit. | ||
Tôle de 0,50 mm d'épaisseur. | 5,32 | 1,71 |
Tôle de 0,65 mm d'épaisseur. | 6,32 | 1,72 |
( Acier n°3 ) | |||||
C | Mn | Si | S | Al | P |
0,003% | 0,106% | 0,326% | 0,007% | 0,001% | 0,173% |
W 1,5/ 50 | B5000 | |
( W/kg ) | ( Tesla ) | |
Tôle sans recuit. ( invention ) | ||
Tôle de 0,50 mm d'épaisseur. | 5,80 | 1,77 |
Tôle de 0,65 mm d'épaisseur. | 7,03 | 1,77 |
- sans effectuer de recuit rapide de la tôle laminée à chaud, grâce à un meilleur contrôle de la température de fin de laminage à chaud et de bobinage, et à condition de limiter la teneur en manganèse contenu dans la composition de l'acier.
- en l'absence de recuit initial et avec un seul laminage à froid.
Claims (5)
- Procédé de fabrication d'une tôle magnétique à grains non orientés à partir de l'élaboration sous vide d'un acier ayant une compositioncarbone < 0,01 %silicium < 0,5%,manganèse, de 0,05 à 0,5%aluminium < 0,03%,phosphore < 0,20%,soufre < 0,015%;azote < 0,01 %,oxygène < 0,01 %, le reste étant du fer et impuretés inévitables,un laminage à chaud avec une température de réchauffage de brame inférieure à 1300°C, une température de fin de laminage à chaud inférieure à 950°C, la bande laminée à chaud étant bobinée à une température supérieure à 550°C,une opération facultative de grenaillage,une opération de décapage,
- Procédé selon la revendication 1 caractérisé en ce que le laminage à froid en une opération est réalisé sous un taux de réduction compris entre 25 et 90%.
- Procédé selon les revendications 1 à 2, caractérisé en ce que le recuit final au défilé est réalisé à une température comprise entre 700 et 1050 °C pendant un temps inférieur à 10 mn.
- Procédé selon les revendications 1 à 3, caractérisé en ce que, en outre, après le recuit final on soumet la tôle préalablement découpée à un recuit d'élimination des contraintes.
- Procédé selon la revendication 4, caractérisé en ce que le recuit d'élimination des contraintes est effectué à une température supérieur à 650 °C pendant un temps supérieur à 3 mn.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04014453A EP1473371B1 (fr) | 1996-01-25 | 1997-01-21 | Procédé de fabrication de tole d'acier magnétique à grains non orientés et tole obtenue par le procédé |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9600808 | 1996-01-25 | ||
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 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04014453A Division EP1473371B1 (fr) | 1996-01-25 | 1997-01-21 | Procédé de fabrication de tole d'acier magnétique à grains non orientés et tole obtenue par le procédé |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0786528A1 EP0786528A1 (fr) | 1997-07-30 |
EP0786528B1 true EP0786528B1 (fr) | 2004-09-29 |
Family
ID=9488423
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04014453A Expired - Lifetime EP1473371B1 (fr) | 1996-01-25 | 1997-01-21 | Procédé de fabrication de tole d'acier magnétique à grains non orientés et tole obtenue par le procédé |
EP97400114A Expired - Lifetime EP0786528B1 (fr) | 1996-01-25 | 1997-01-21 | Procédé de fabrication de tôle d'acier magnétique à grains non orientés et tôle obtenue par le procédé |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04014453A Expired - Lifetime EP1473371B1 (fr) | 1996-01-25 | 1997-01-21 | Procédé de fabrication de tole d'acier magnétique à grains non orientés et tole obtenue par le procédé |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP1473371B1 (fr) |
AT (2) | ATE343651T1 (fr) |
DE (2) | DE69736868T2 (fr) |
ES (2) | ES2276191T3 (fr) |
FR (1) | FR2744135B1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003014404A1 (fr) * | 2001-08-11 | 2003-02-20 | Thyssenkrupp Electrical Steel Ebg Gmbh | Tole ou bande magnetique a grains non orientes et procede de fabrication de ladite tole ou bande |
HUE027079T2 (en) * | 2005-08-03 | 2016-10-28 | Thyssenkrupp Steel Europe Ag | A method for producing magnetizable, grain oriented steel strip |
PL1752549T3 (pl) * | 2005-08-03 | 2017-08-31 | Thyssenkrupp Steel Europe Ag | Sposób wytwarzania taśmy elektrotechnicznej o zorientowanych ziarnach |
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)
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 (fr) * | 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 |
EP0779369B1 (fr) * | 1994-06-24 | 2000-08-23 | Nippon Steel Corporation | Procede de fabrication de tole d'acier electrique non orientee presentant une densite elevee de flux magnetique et un niveau faible de pertes en fer |
-
1996
- 1996-01-25 FR FR9600808A patent/FR2744135B1/fr not_active Expired - Fee Related
-
1997
- 1997-01-21 ES ES04014453T patent/ES2276191T3/es not_active Expired - Lifetime
- 1997-01-21 EP EP04014453A patent/EP1473371B1/fr not_active Expired - Lifetime
- 1997-01-21 DE DE69736868T patent/DE69736868T2/de not_active Expired - Fee Related
- 1997-01-21 DE DE69730884T patent/DE69730884T2/de not_active Expired - Fee Related
- 1997-01-21 AT AT04014453T patent/ATE343651T1/de not_active IP Right Cessation
- 1997-01-21 ES ES97400114T patent/ES2230591T3/es not_active Expired - Lifetime
- 1997-01-21 EP EP97400114A patent/EP0786528B1/fr not_active Expired - Lifetime
- 1997-01-21 AT AT97400114T patent/ATE278041T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ATE278041T1 (de) | 2004-10-15 |
DE69730884D1 (de) | 2004-11-04 |
DE69736868D1 (de) | 2006-12-07 |
DE69736868T2 (de) | 2007-06-06 |
EP1473371B1 (fr) | 2006-10-25 |
EP1473371A2 (fr) | 2004-11-03 |
ES2276191T3 (es) | 2007-06-16 |
ES2230591T3 (es) | 2005-05-01 |
DE69730884T2 (de) | 2005-11-17 |
FR2744135A1 (fr) | 1997-08-01 |
EP0786528A1 (fr) | 1997-07-30 |
EP1473371A3 (fr) | 2005-04-13 |
FR2744135B1 (fr) | 1998-02-27 |
ATE343651T1 (de) | 2006-11-15 |
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