EP3491158A1 - Bande d'acier destinée à la fabrication d'une tôle pour circuits magnétiques à grains non orientés et procédé de fabrication d'une telle bande d'acier - Google Patents

Bande d'acier destinée à la fabrication d'une tôle pour circuits magnétiques à grains non orientés et procédé de fabrication d'une telle bande d'acier

Info

Publication number
EP3491158A1
EP3491158A1 EP17745283.6A EP17745283A EP3491158A1 EP 3491158 A1 EP3491158 A1 EP 3491158A1 EP 17745283 A EP17745283 A EP 17745283A EP 3491158 A1 EP3491158 A1 EP 3491158A1
Authority
EP
European Patent Office
Prior art keywords
steel strip
steel
strip
hot
rolling
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.)
Granted
Application number
EP17745283.6A
Other languages
German (de)
English (en)
Other versions
EP3491158B1 (fr
Inventor
Zacharias Georgeou
Frank Klose
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.)
Salzgitter Flachstahl GmbH
Original Assignee
Salzgitter Flachstahl GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Salzgitter Flachstahl GmbH filed Critical Salzgitter Flachstahl GmbH
Publication of EP3491158A1 publication Critical patent/EP3491158A1/fr
Application granted granted Critical
Publication of EP3491158B1 publication Critical patent/EP3491158B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • C21D8/1277—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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • 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
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular fabrication or treatment of ingot or slab
    • C21D8/1211—Rapid solidification; Thin strip casting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1233—Cold rolling
    • 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
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1272—Final recrystallisation annealing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C2202/00—Physical properties
    • C22C2202/02—Magnetic

Definitions

  • the invention relates to a steel strip for producing a non-grain oriented electrical steel sheet and a method for producing such a steel strip.
  • Materials for electrical sheets are z. B. from DE 101 53 234 A1 or DE 601 08 980 T2. They usually consist of an iron-silicon or iron-silicon-aluminum alloy, whereby a distinction is made between grain-oriented (KO) and non-grain-oriented (NO) electrical sheets and these are used for different applications.
  • KO grain-oriented
  • NO non-grain-oriented
  • aluminum and silicon are added to increase the strength and density, and in particular to increase the electrical resistance with as little magnetic change as possible
  • non-grain oriented electrical steel This is mainly used in generators, electric motors, contactors, relays and small transformers.
  • the ideal structure (microstructure) for a non-oriented (NO) electrical steel strip is a polycrystalline microstructure with particle sizes between 20 ⁇ m and 200 ⁇ m, the crystallites being aligned randomly in the plane of the sheet with the surface (100).
  • the magnetic properties of real non-oriented electrical steel in the sheet plane are slightly dependent on the magnetization direction.
  • the loss differences between the longitudinal and transverse directions are max. 10%.
  • Characteristics of non-oriented electrical steel are significantly influenced by the design of the hot forming, cold forming and
  • the magnetic properties of the electrical steel are essentially due to a high degree of purity, the content of silicon and aluminum (up to about 4% by mass) and targeted addition of others Alloy elements, such.
  • Alloy elements such as manganese, sulfur and nitrogen, and by
  • Hot rolling, cold rolling and annealing processes determined.
  • the common sheet thicknesses are in the range well below 1 mm, z. B. at 0.18 or 0.35 mm.
  • the material known from published patent application DE 101 53 234 A1 for a non-grain-oriented electrical steel sheet has an alloy composition in% by weight with C ⁇ 0.02%, Mn ⁇ 1.2%, Si 0.1-4.4% and Al 0.1 -4.4%.
  • By subsequent cold rolling a strip with a thickness of up to 0.2 mm can be achieved.
  • the patent DE 603 06 365 T2 discloses a material for a
  • Non-grain oriented electrical steel in wt% consisting of up to about 6.5% silicon, 5% chromium, 0.05% carbon, 3% aluminum, 3% manganese, balance iron and residues.
  • the steel strip is produced by a vertical strip casting process in which the liquid steel is fed into the casting gap of two counter-rotating, internally cooled casting rolls. The cast strip can then be hot and cold rolled to achieve strip thicknesses below 1 mm.
  • WO 2013/1 17184 A1 discloses a hot strip for producing a non-grain-oriented or grain-oriented electrical sheet, the hot strip consisting of the following alloy composition in% by weight: C: 0.001 to 0.08, Al: 4.8 to 20, Si: 0.05 to 10, B: up to 0.1, Zr: up to 0.1, Cr: 0.1 to 4, remainder iron and impurities caused by melting.
  • the hot strip is produced in such a way that the melt is first flow-smoothed in a horizontal strip casting plant and cast without bending to a preliminary strip in the range between 6 and 30 mm and then rolled to hot strip with a degree of deformation of at least 50%.
  • the hot strip can then be cold rolled to a thickness of up to 0.150 mm.
  • the known alloys for a non-grain-oriented electrical steel have the disadvantage that the magnetic properties, in particular the
  • Magnetizing current are dependent. In particular, rising at high frequencies and higher amplitudes hysteresis losses significantly, which adversely affects just in high-speed engines.
  • the object of the invention is to provide a steel strip for producing a non-grain-oriented electrical steel sheet which has significantly improved frequency-independent magnetic properties, in particular significantly reduced hysteresis losses, in comparison with known electrical steel sheets. Another object is to provide a manufacturing method for such a steel strip.
  • the steel strip according to the invention for producing a non-grain-oriented electrical steel sheet has the following alloy composition in% by weight:
  • Residual iron and impurities resulting from melting with optional addition of one or more elements of Cr, Mo, Zn and Sn,
  • the steel strip has an insulating layer consisting essentially of Al2O3 and / or S1O2 with a thickness in the range of 10 ⁇ to 100 ⁇ .
  • composition of the insulating layer essentially means that at least 50% of the insulating layer consist of Al2O3 or S1O2 or the sum of the two aforementioned components.
  • the thickness of the insulating layer in the range of 20 ⁇ to 100 ⁇ and particularly preferably in the range of 20 ⁇ to ⁇ .
  • the steel strip with the alloy composition according to the invention is characterized by significantly reduced hysteresis losses as well as a substantial amount
  • the with max. 12% high AI content causes a significant increase in electrical resistance and a corresponding reduction in the
  • the hot strip according to claim 16 is hot rolled at temperatures above 1000 ° C or higher, a very high degree of anti-scaling protection is present. Due to the exceptionally high levels of Al of up to 12% by weight or Si of up to 3.5% by weight, a dense, intrinsically formed insulating layer consisting essentially of Al 2 O 3 and / or forms on the surface of the heated sheet S1O2, which effectively reduces or even completely inhibits scaling of the iron in the steel. The thickness of the layer may also be advantageous by the temperature and the time of annealing, in particular the
  • the thickness of the layer increases with increasing temperature and time of annealing.
  • a layer thickness of at least ⁇ ⁇ , preferably of at least 20 ⁇ " ⁇ is achieved
  • this scale layer should not exceed a thickness of 100 ⁇ m, better ⁇ , thus the layer due to the brittleness, which also increases with increasing thickness, does not adversely affect the rolling ability due to flaking scale.
  • an additional insulation layer between the laminations of the plate pack can optionally be saved or significantly reduced. As a result, otherwise necessary insulation material can be saved, which reduces costs and the weight of the component.
  • An addition of Si causes an increase in the electrical resistance. In order to achieve an effect, a minimum content of 0.3 wt .-% is required according to the invention. At contents of more than 3.5% by weight of Si, the amount decreases
  • contents of from 1.0 to 3.0% by weight and preferably from 1.5 to 2.5% by weight are advantageously set.
  • the addition of Si and Al thereby provides an optimum in the selected alloy element contents
  • the content of carbon should be kept as low as possible in order to prevent magnetic aging caused by carbide precipitations in the finished steel strip. Low carbon contents lead to an improvement of the magnetic properties, since there are fewer defects in the material caused, for example, by the carbon atoms and carbides. Carbon contents of not more than 0.03% by weight have proven favorable.
  • manganese is contained in an amount of more than 0.25 to 10% by weight. Manganese increases the volume resistivity. In order to produce a corresponding effect, more than 0.25% by weight of manganese should be contained in the steel. To ensure easy further processing by hot and cold rolling, the manganese content should not exceed 10 wt .-% because of the formation of brittle phases. In this case, a negative effect of Mn on the rollability complex depends on the sum of the elements Al, Si and Mn.
  • a sum content of Mn + Al + Si of less than or equal to 20% by weight should be the upper limit for the rollability.
  • the Cu content should be more than 0.05 wt .-%. Not more than 3% by weight of Cu should be alloyed to the steel, otherwise the coagulation on the grain boundaries will deteriorate the workability and may cause solder cracking during hot rolling.
  • the addition of nickel has a positive effect in terms of reducing the
  • the minimum content should be above 0.01% by weight, but since nickel is a very expensive element, for economic reasons a maximum value of 5.0% by weight should not be exceeded.
  • the content of nickel is between 0.01 and 3.0 wt .-%.
  • the specific Volume resistance of the material can be influenced.
  • alloy variants Taking account of good hot and cold rollability, the following alloy variants have been found to be particularly favorable (% by weight): Al: 1 to 6
  • the mechanical properties can be inventively through the
  • Steel strips according to the invention have a strength Rm of 450 to 690 MPa, a yield strength Rp0.2 of 310 to 550 MPa and an elongation A80 of 5 to 30%.
  • Steel strip includes the steps:
  • Annealing temperature 550 to 800 ° C
  • Annealing time 20 to 80 min, followed by cooling in air
  • Annealing temperature 900 to 1080 ° C
  • annealing time 10 to 60 seconds with subsequent cooling in air to set an insulating layer consisting essentially of Al2O3 and / or S1O2 on the steel strip with a thickness in the range of 10 ⁇ to ⁇ ⁇ , preferably in the range of 20 ⁇ to ⁇ ⁇ , particularly preferably in the range 20 ⁇ to ⁇ , thereby.
  • Alloy composition has been used in steel making difficult to manufacture alloy variants, especially at elevated
  • the high degree of reduction is also necessary to destroy the microstructure, especially in high-Al alloys and thus to reduce the grains (grain refining).
  • higher Al contents therefore require correspondingly higher reduction rates.
  • the advantage of the proposed method is also to be seen in the fact that when using a horizontal strip casting Macroseiger Heidelberg and voids can be largely avoided due to very homogeneous cooling conditions in the horizontal strip casting.
  • receiving casting belt is supported on a plurality of adjacent rollers.
  • the support is reinforced in such a way that in the region of the casting belt, a negative pressure is generated, so that the casting belt is pressed firmly on the rollers.
  • the Al-rich or Si-rich melt solidifies in an almost oxygen-free casting atmosphere.
  • the length of the conveyor belt is chosen so that at the end of the
  • Conveyor belt before the deflection of the Vorband is largely solidified.
  • a homogenization zone which is used for temperature compensation and possible stress relief.
  • Rolling of the pre-strip to hot strip can be done either in-line or separately off-line.
  • the pre-strip Before off-line rolling, the pre-strip may be either directly hot-rolled or sliced into sheets after manufacture prior to cooling. The strip or sheet material is then reheated after eventual cooling and unwound for off-line rolling or reheated and rolled as a sheet.
  • the rolling of the hot strip to final thickness can by means of classical cold rolling at room temperature or according to the invention particularly advantageous at elevated Temperature be performed well above the room temperature.
  • finishing rolling is used below when a
  • Hot strip is finish rolled at elevated temperature with the required final thickness.
  • An advantage of finish rolling at elevated temperature is that it can significantly reduce the potential for edge cracking during rolling. Furthermore, this makes it possible to influence the electromagnetic properties in a wide field, for example via the grain size,
  • FIG. 1 shows three advantageous production paths.
  • THR hot rolling at temperatures between 1000 and 1 150 ° C
  • T 2C , T 3C final annealing for all route (900 to 1080 ° C, 10-60 s, air cooling), T 2A , T 2B , T 3A , T 3B : intermediate annealing for route 2 and 3 (550 to 800 ° C, 20 to 80 min), TR: finish rolling for route 3 at elevated temperatures of 350 to 570 ° C
  • the hot strip is at room temperature to the required
  • two-stage cold rolling in Route 2 can be used by first rolling to the desired final thickness with a thickness reduction of up to 60% at room temperature, then in a temperature range of 550 outsourced to 650 ° C for 40 to 60 min, and then the remaining 40% of the desired final thickness is again achieved by cold rolling.
  • a material, in particular with an increased Al content greater than 6% by weight or Al + Si in total greater than 6% by weight, which has edge cracks after the first cold rolling, can be produced according to Route 3 by finish rolling at elevated temperature. After heating in a temperature range of 350 to 600 ° C, preferably 350 to 520 ° C, is rolled, and then iteratively reheated in the aforementioned
  • alloys according to the invention Some results of alloys according to the invention will be described below. Alloys were tested according to Table 1, whereby only the essential elements were determined. The alloys 13, 17 and 22 are according to the invention and have been investigated in comparison to the non-inventive reference material Ref1.
  • Table 2 shows the mechanical properties of the alloys and the determined specific gravity of the materials. In addition to different mechanical properties
  • Properties can also be materials with different specific Generate densities, so that a variety of requirements for the materials of the invention can be realized.
  • Table 3 shows the results for measuring the frequency dependence of the magnetic flux density E on steel sheets having a thickness of 0.7 mm of the alloys under investigation. The measurements were carried out at frequencies f of 50, 200, 400, 750 and 1000 Hz. The results impressively demonstrate the extensive frequency independence of the magnetic flux density and thus the hysteresis losses in a periodic alternating field.

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

Abstract

L'invention concerne une bande d'acier destinée à la fabrication d'une tôle pour circuits magnétiques à grains non orientés. L'invention vise à obtenir, par rapport aux tôles pour circuits magnétiques selon l'état de la technique, des propriétés magnétiques indépendantes de la fréquence significativement améliorées, en particulier à obtenir des pertes d'hystérésis significativement réduites. La solution selon l'invention porte sur la composition d'alliage suivante, en % p/p : C : ≦ 0,03; Al : 1 à 12; Si : 0,3 à 3,5; Mn : > 0,25 à 10; Cu : > 0,05 à 3,0; Ni : > 0,01 à 5,0; somme de N, S et P : n'excédant pas 0,07, le reste étant constitué de fer et d'impuretés résiduelles liées à la fusion, avec addition facultative d'un ou de plusieurs éléments parmi Cr, Mo, Zn et Sn, la bande d'acier comprenant une couche isolante, constituée sensiblement de (Al2O3) et/ou de (SiO2), à une épaisseur dans la plage allant de 10μm à 100μm. L'invention concerne en outre un procédé de fabrication d'une telle bande d'acier.
EP17745283.6A 2016-07-29 2017-07-13 Bande d'acier destinée à la fabrication d'une tôle pour circuits magnétiques à grains non orientés et procédé de fabrication d'une telle bande d'acier Active EP3491158B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016114094 2016-07-29
PCT/EP2017/067703 WO2018019602A1 (fr) 2016-07-29 2017-07-13 Bande d'acier destinée à la fabrication d'une tôle pour circuits magnétiques à grains non orientés et procédé de fabrication d'une telle bande d'acier

Publications (2)

Publication Number Publication Date
EP3491158A1 true EP3491158A1 (fr) 2019-06-05
EP3491158B1 EP3491158B1 (fr) 2020-12-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17745283.6A Active EP3491158B1 (fr) 2016-07-29 2017-07-13 Bande d'acier destinée à la fabrication d'une tôle pour circuits magnétiques à grains non orientés et procédé de fabrication d'une telle bande d'acier

Country Status (6)

Country Link
US (1) US11047018B2 (fr)
EP (1) EP3491158B1 (fr)
KR (1) KR102364477B1 (fr)
CN (1) CN109477188B (fr)
RU (1) RU2715586C1 (fr)
WO (1) WO2018019602A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101901313B1 (ko) * 2016-12-19 2018-09-21 주식회사 포스코 무방향성 전기강판 및 그 제조방법
JP7415135B2 (ja) * 2019-11-15 2024-01-17 日本製鉄株式会社 無方向性電磁鋼板の製造方法
DE102019133493A1 (de) * 2019-12-09 2021-06-10 Salzgitter Flachstahl Gmbh Elektroband oder -blech, Verfahren zur Erzeugung hierzu und daraus hergestelltes Bauteil
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KR20190034585A (ko) 2019-04-02
CN109477188A (zh) 2019-03-15
CN109477188B (zh) 2021-09-14
US11047018B2 (en) 2021-06-29
WO2018019602A1 (fr) 2018-02-01
KR102364477B1 (ko) 2022-02-16
EP3491158B1 (fr) 2020-12-02
US20190271053A1 (en) 2019-09-05

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