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EP2979281B1 - Tôle d'acier électrique avec un revêtement pour améliorer l'isolation électrique et procédé de sa fabrication - Google Patents

Tôle d'acier électrique avec un revêtement pour améliorer l'isolation électrique et procédé de sa fabrication Download PDF

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Publication number
EP2979281B1
EP2979281B1 EP14721254.2A EP14721254A EP2979281B1 EP 2979281 B1 EP2979281 B1 EP 2979281B1 EP 14721254 A EP14721254 A EP 14721254A EP 2979281 B1 EP2979281 B1 EP 2979281B1
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EP
European Patent Office
Prior art keywords
layer
steel sheet
tantalum
titanium
oxide
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.)
Active
Application number
EP14721254.2A
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German (de)
English (en)
Other versions
EP2979281A1 (fr
Inventor
Jens Dahl Jensen
Axel MÖHLE
Ralph Reiche
Manuela Schneider
Oliver Stier
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.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
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Publication date
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Publication of EP2979281A1 publication Critical patent/EP2979281A1/fr
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    • 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
    • H01F1/16—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 in the form of sheets
    • 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
    • H01F1/16—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 in the form of sheets
    • H01F1/18—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 in the form of sheets with insulating coating
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1277—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
    • 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
    • C21D8/1283—Application of a separating or insulating coating
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/60—After-treatment
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/02—Pretreatment of the material to be coated
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10—Oxidising

Definitions

  • the invention relates to an electrical sheet with an electrical insulation improving layer.
  • Such electrical sheets are used according to the prior art, for example in electric drives in the construction of stators.
  • the materials used are regulated by the standard EN 10106 (1995).
  • the materials mentioned in this standard provide a wide range of products to meet the needs of different applications.
  • the usable materials range from low-alloyed steel with excellent magnetic permeability, good thermal conductivity and punchability to higher-alloyed steels with very low core losses even at higher frequencies.
  • the base of the alloy is iron.
  • Coatings for electrical sheets can be taken from the standard EN 10342 (from 2005).
  • aluminum layers on ferroalloy components may be used to reduce the nitrogen content in the component.
  • an intermediate layer of aluminum nitride is formed between the aluminum layer and the component, which also acts as a diffusion barrier layer, so that aluminum can not diffuse into the component.
  • aluminum it is also possible to use other metals which are capable of forming nitrides with nitrogen. Examples of such metals include titanium and tantalum.
  • the object of the invention is therefore to provide an electrical sheet which is also suitable for use under severe corrosive conditions.
  • the layer of a metal oxide containing mainly titanium oxide or tantalum oxide, and that the electrical steel has a diffusion zone in which the metal of the metal oxide is diffused into the material of the electric sheet and the the layer adjoins. Due to the fact that the oxide layer adjoins a diffusion layer, the adhesion of the oxide layer is advantageously greatly improved.
  • the use of metals, titanium or tantalum causes the spontaneously forming on the surface of the electrical sheet oxide layer is very resistant to corrosive media. This also makes use under extreme corrosive conditions such. B. sour gas possible. For example, motor pumps can be operated, which are used for the promotion of natural gas in the subsea area.
  • the oxide layer can also be produced by an electrochemical treatment of the surface (more on this in the following).
  • the diffusion zone following the oxide layer has two advantages. On the one hand, the diffusion zone improves the adhesion of the oxide layer, since the transition between the oxide layer and the matrix material of the electrical steel, a steel alloy, takes place continuously, which reduces the formation of stresses. In addition, it is advantageously possible that in case of damage to the oxide layer, the material contained in the diffusion layer of titanium or tantalum can be used to passivate the damaged area. For this purpose, the metal in question diffuses to the surface, where a renewed passivation takes place. The corrosion protection is thereby advantageously retained.
  • the layer has a thickness of at least 5 and at most 10 microns. These are layer thicknesses of the oxide layer, which allow effective corrosion protection and in their production due to the small thickness advantageously require low production costs and low material usage.
  • the diffusion zone within a distance of 2 microns from the interface to the layer has a content of titanium or tantalum of more than 50% by weight.
  • These are alloy contents which advantageously permit diffusion-induced transport of titanium or tantalum to damaged areas (as already described).
  • contents of up to 100% of titanium or tantalum can also occur directly below the oxide layer.
  • the invention relates to a method for treating an electric sheet, in which the electrical sheet is coated with an electrical insulation improving layer.
  • the prior art has already been discussed. The task which results from this is to specify a method with which the treatment of electrical steel sheets is possible and which produces products which ensure sufficient corrosion protection even under strongly corrosive influences.
  • a diffusion zone is produced on the surface of the electric sheet, wherein as a metal tantalum or titanium diffused into the surface, wherein the first step as a PVD process in an inert gas atmosphere a subsequent heat treatment is performed.
  • the metal, tantalum or titanium on the surface is converted into the associated metal oxide, titanium oxide or tantalum oxide, wherein a layer of the metal oxide is formed and remains in the diffusion zone, a residual content of the metal of the metal oxide.
  • the residual content remains on the metal of the metal oxide, whereby, as already explained, the adhesion of the oxide layer is improved.
  • a depot is formed by the diffusion zone on the corresponding material, which is available in case of injuries of the oxide layer to heal the injury by spontaneous passivation.
  • PVD processes are advantageously easy to handle.
  • Both titanium and tantalum can be deposited on steel by using suitable target materials.
  • titanium is deposited in multiple ways by PVD processes to make tool coatings, usually in a reactive nitrogen atmosphere, to produce titanium nitride. If instead an inert gas atmosphere is selected, pure titanium is deposited. Tantalum can also be easily deposited on steel.
  • Such a method is for example in the EP 77 535 A1 described.
  • the deposition of titanium for example, by spraying or powder coating done, such as the Derwent Abstract with the Accession Number 1978-43006 A (corresponding to JP 53-50019 A ) can be seen.
  • the powder processes are also referred to as packing processes, in which case the diffusion layers are formed by diffusing the tantalum into the workpiece.
  • the diffusion layer thus arises immediately, whereas in PVD processes after the coating process, a heat treatment has to take place, which leads to an inward diffusion of the tantalum or titanium into the matrix of the electrical sheet.
  • Parameters for such diffusion treatments are well known and can be found, for example, in the Derwent Abstract with the Accession Number 1984-104398 (corresponding to US Pat JP 59-47371 A ) remove.
  • electrochemical coatings for example in a salt bath, are also conceivable in principle, or else coating by means of CVD.
  • the diffusion zone before the formation of the layer within a distance of 5 microns from the interface to the layer has a content of titanium or tantalum of more than 50% by weight. It goes without saying that the diffusion zone must have a larger area with a high titanium or tantalum concentration before the formation of the layer, since a portion of the previously formed diffusion layer is converted into the oxide layer by oxidation of the titanium or tantalum. In order to still have enough material for a repair of the oxide layer in the matrix of the electrical steel available after this oxidation process, therefore, the proportion of titanium or tantalum must be sufficiently high.
  • FIGURE shows an embodiment of the electric sheet metal according to the invention in cross section.
  • an electric sheet 11 the top 12 and bottom 13 is provided in each case with a layer 14 of tantalum oxide.
  • This layer 14 is followed by a diffusion zone 15, which has a common interface 16 with the layer 12 of tantalum oxide. Behind the interface, the concentration of tantalum in the diffusion zone is well over 50%. This falls to the interior of the electric sheet 11 continues until the concentration is 0% by weight. In itself, therefore, a boundary between the actual electrical sheet 11 and the diffusion zone 15 can not really represent.
  • the figure shows the region in which the concentration of tantalum in the microstructure of the electrical sheet 11 is more than 50%.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Soft Magnetic Materials (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Physical Vapour Deposition (AREA)
  • Laminated Bodies (AREA)
  • Insulating Bodies (AREA)

Claims (7)

  1. Tôle électrique (11) pourvue d'une couche (14) améliorant l'isolation électrique,
    caractérisée en ce que la couche (14) est formée d'un oxyde métallique contenant principalement de l'oxyde de titane ou de l'oxyde de tantale et en ce que la tôle électrique (11) comporte une zone de diffusion (15) dans laquelle le métal de l'oxyde métallique a diffusé dans le matériau de la tôle électrique et qui est contigüe à la couche (14).
  2. Tôle électrique selon la revendication 1,
    caractérisée en ce que la couche (14) a une hauteur de 5 µm au minimum et de 10 µm au maximum.
  3. Tôle électrique selon la revendication 1 ou 2,
    caractérisée en ce que la zone de diffusion (15) a une teneur en titane ou en tantale supérieure à 50% en poids sur une distance de 2 µm par rapport à l'interface avec la couche (14).
  4. Procédé de traitement d'une tôle électrique, dans lequel la tôle électrique (11) est revêtue d'une couche (14) améliorant l'isolation électrique,
    caractérisé en ce que,
    - dans une première étape, une zone de diffusion (15) est produite à la surface de la tôle électrique (11), le métal diffusant dans la surface étant du tantale ou du titane, la première étape étant exécutée en tant que dépôt en phase gazeuse par procédé physique (PVD) dans une atmosphère gazeuse inerte, suivi d'un traitement thermique; et
    - dans une seconde étape, le métal tantale ou titane présent à la surface est transformé en l'oxyde métallique correspondant, oxyde de titane ou oxyde de tantale, une couche (14) de l'oxyde métallique se formant et une teneur résiduelle du métal de l'oxyde métallique demeurant dans la zone de diffusion (15).
  5. Procédé selon la revendication 4,
    caractérisé en ce que la zone de diffusion (15) présente, avant la formation de la couche, une teneur en titane ou en tantale supérieure à 50% en poids sur une distance de 5 µm par rapport à l'interface avec la couche (14).
  6. Procédé selon l'une des revendications 4 ou 5,
    caractérisé en ce qu'une couche de passivation formée spontanément est éliminée avant l'exécution de la seconde étape.
  7. Procédé selon l'une des revendications 4 à 6,
    caractérisé en ce que la seconde étape est exécutée en tant que traitement thermique dans une atmosphère oxygénée.
EP14721254.2A 2013-05-10 2014-04-17 Tôle d'acier électrique avec un revêtement pour améliorer l'isolation électrique et procédé de sa fabrication Active EP2979281B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013208617.2A DE102013208617A1 (de) 2013-05-10 2013-05-10 Elektroblech mit einer die elektrische Isolation verbessernden Schicht und Verfahren zu dessen Herstellung
PCT/EP2014/057879 WO2014180646A1 (fr) 2013-05-10 2014-04-17 Tôle électrique avec une couche améliorant l'isolation électrique et procédé de fabrication de ladite tôle électrique

Publications (2)

Publication Number Publication Date
EP2979281A1 EP2979281A1 (fr) 2016-02-03
EP2979281B1 true EP2979281B1 (fr) 2019-06-12

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EP14721254.2A Active EP2979281B1 (fr) 2013-05-10 2014-04-17 Tôle d'acier électrique avec un revêtement pour améliorer l'isolation électrique et procédé de sa fabrication

Country Status (10)

Country Link
US (1) US9959959B2 (fr)
EP (1) EP2979281B1 (fr)
CN (1) CN105190794B (fr)
AU (1) AU2014264849B2 (fr)
BR (1) BR112015027423A2 (fr)
CA (1) CA2911552C (fr)
DE (1) DE102013208617A1 (fr)
RU (1) RU2635501C2 (fr)
SA (1) SA515370121B1 (fr)
WO (1) WO2014180646A1 (fr)

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CN116731543B (zh) * 2023-07-24 2024-07-02 无锡普天铁心股份有限公司 一种环保取向硅钢绝缘涂液及其制备方法和应用

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AU2014264849A1 (en) 2015-11-19
WO2014180646A1 (fr) 2014-11-13
EP2979281A1 (fr) 2016-02-03
US9959959B2 (en) 2018-05-01
US20160125986A1 (en) 2016-05-05
CA2911552A1 (fr) 2014-11-13
RU2015148135A (ru) 2017-06-16
CN105190794B (zh) 2018-12-07
RU2635501C2 (ru) 2017-11-13
BR112015027423A2 (pt) 2017-07-25
DE102013208617A1 (de) 2014-11-13
SA515370121B1 (ar) 2018-04-18
AU2014264849B2 (en) 2016-10-13
CN105190794A (zh) 2015-12-23
CA2911552C (fr) 2017-12-05

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