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WO2019132375A1 - Feuille d'acier électrique non orientée et son procédé de fabrication - Google Patents

Feuille d'acier électrique non orientée et son procédé de fabrication Download PDF

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Publication number
WO2019132375A1
WO2019132375A1 PCT/KR2018/016136 KR2018016136W WO2019132375A1 WO 2019132375 A1 WO2019132375 A1 WO 2019132375A1 KR 2018016136 W KR2018016136 W KR 2018016136W WO 2019132375 A1 WO2019132375 A1 WO 2019132375A1
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WIPO (PCT)
Prior art keywords
less
steel sheet
electrical steel
oriented electrical
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.)
Ceased
Application number
PCT/KR2018/016136
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English (en)
Korean (ko)
Inventor
이헌주
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.)
Posco Holdings Inc
Original Assignee
Posco Co Ltd
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 Posco Co Ltd filed Critical Posco Co Ltd
Publication of WO2019132375A1 publication Critical patent/WO2019132375A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—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
    • 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
    • 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
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon

Definitions

  • Non-oriented electrical steel sheet and manufacturing method thereof are non-oriented electrical steel sheet and manufacturing method thereof.
  • the nonoriented electrical steel sheet is mainly used in motors that convert electrical energy into mechanical energy.
  • nonmagnetic steel sheets require excellent magnetic properties.
  • eco-friendly technology has attracted attention,
  • the magnetic properties of nonoriented electrical steel sheets are mainly evaluated by iron loss and magnetic flux density.
  • Iron loss means energy loss occurring at a specific magnetic flux density and frequency
  • magnetic flux density means the degree of magnetization obtained under a specific magnetic field.
  • the lower the core loss the more energy efficient motors can be manufactured under the same conditions.
  • the higher the magnetic flux density the smaller the motor and the less the copper hand, so the non-directional electric steel sheet with low iron loss and high magnetic flux density It is important.
  • the characteristics of the non-oriented electrical steel sheet to be considered according to the operating conditions of the motor also vary.
  • the iron loss W15 / 50 is considered to be the most important when many motors have a commercial frequency of 50 Hz and a magnetic field of 1.5 T is applied.
  • not all W15 / 50 iron losses are considered to be the most important for all motors for various purposes, and depending on the main operating conditions, iron loss at different frequencies or applied magnetic field 2019/132375 1 »(: 1 ⁇ ⁇ 2018/016136
  • a commonly used method for increasing the magnetic properties of non-oriented electrical steel sheets is to add alloying elements such as the above.
  • the addition of such an alloying element can increase the resistivity of the steel. The higher the resistivity, the lower the eddy current loss and the lower the total iron loss.
  • the ⁇ 111 ⁇ ⁇ 11 > texture is known to be unfavorable to magnetism, and attempts have been made to suppress its formation.
  • a method of restricting the content of the critical content to an extremely low level is known.
  • the resistivity is low and it is disadvantageous in that it can not be used for a motor which needs high speed rotation because it has a low yield strength or is deviated to high frequency magnetism.
  • One embodiment of the present invention provides a non-oriented electrical steel sheet and a method of manufacturing the same. Specifically, (, non-oriented to precisely control the components, and so on, and the first after the cold rolling to "skin pass introducing a secondary cold rolling process, by minimizing the ⁇ 111 ⁇ ⁇ 11> texture fraction, ultimately improving the magnetic An electric steel sheet and a manufacturing method thereof. 2019/132375 1 »(: 1 ⁇ ⁇ 2018/016136
  • the non-oriented electrical steel sheet according to an embodiment of the present invention may contain, by weight%, 2.6 to 3.6%, 0.2 to 1.3%, 0.1 to 1.5%, 0 to 0.005% (excluding 0%), 0.005% or less ( ⁇ excluding%) (excluding 0%) 0.005% or less, 0, 0.01 to 0.06%, 0.003 to 0.08% (0.001 to 0.008% and the balance unit 6 and not Containing impurities, Is less than or equal to 10%.
  • the non-oriented electrical steel sheet according to an embodiment of the present invention may further include at least one of 0.003% by weight or less, 0.003% by weight or less, V: 0.003% by weight or less and 3 ⁇ 4: 0.003% by weight or less.
  • the non-oriented electrical steel sheet according to an embodiment of the present invention may have an average crystal grain diameter of 70 to 150 ⁇ .
  • the non-oriented electrical steel sheet according to an embodiment of the present invention may have a thickness of 0.1 to 0.65.
  • the method of manufacturing a non-oriented electrical steel sheet according to an embodiment of the present invention may include: 2.6 to 3.6% by weight, 0.2 to 1.3% by weight, 0.1 to 1.5% by weight,
  • a method of manufacturing a cold-rolled steel sheet comprising the steps of:
  • the step of heating the slab may heat the slab to 12001 or less.
  • the step of preparing the hot rolled sheet may have a finish rolling temperature of 800 rpm. After the step of producing the hot-rolled sheet, the annealing of the hot-rolled sheet can be omitted and the primary cold-rolling can be started.
  • the non-oriented electrical steel sheet according to one embodiment of the present invention has 0, I 3 and ( 2019/132375 1 »(: 1 ⁇ ⁇ 2018/016136
  • the non-oriented electrical steel sheet according to one embodiment of the present invention ultimately improves the magnetic properties of the authors, thereby providing a high-grade non-oriented electrical steel sheet.
  • first, second and third, etc. are used to describe various portions, components, regions, layers and / or sections, but are not limited thereto. These terms are only used to distinguish any moiety, element, region, layer or section from another moiety, moiety, region, layer or section. Thus, a first portion, component, region, layer or section described below may be referred to as a second portion, component, region, layer or section without departing from the scope of the invention.
  • the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.
  • the singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is embodied in a different feature, region, integer, step, operation, element and / It does not exclude existence or addition.
  • any parts are referred to as being 11 on the “top” or “the other part, directly it may be on or above the other part knows or can be accompanied by other parts in between. In contrast, when referring to a part being "directly above” another part, no other part is interposed therebetween.
  • % means% by weight
  • the further inclusion of an additional element means that the additional element is replaced by an additional amount of the additional element.
  • the non-oriented electrical steel sheet according to one embodiment of the present invention is composed of 2.6 to 3.6% by weight, 0.2 to 1.3% by weight, 0.1 to 1.5% by weight, 0: 0.005% by weight (excluding 0% , 0.005% or less (excluding 0%), 0.005% or less (excluding 0%), 0: 0.01 to 0.06%, 0.003 to 0.08%, 0.001 to 0.008%, and the pan portion contains 6 and unavoidable impurities .
  • Silicon () enhances the resistivity of the material and lowers the iron loss, and when added too little, the iron loss improvement effect may be insufficient. On the other hand, if too much is added, the brittleness of the material may increase and the rolling productivity may be deteriorated drastically. Therefore, the above range can be added. More specifically 2.7 to 3.5% by weight.
  • Aluminum (Si) plays a role of lowering the iron loss by increasing the resistivity of the material, and if it is added too little, the nitride may be finely formed, which may degrade the magnetism. On the other hand, if it is added too much, excessive nitrides are formed to deteriorate the magnetic properties, which can cause problems in all processes such as steelmaking and continuous casting, thereby greatly reducing the productivity. Therefore, poisons can be added in the above-mentioned range. And more specifically 0.3 to 1.2% by weight.
  • Manganese () increases the resistivity of the material and improves iron loss and forms sulphide. When added too little, sulphide is finely stranded 2019/132375 1 »(: 1 ⁇ ⁇ 2018/016136
  • the magnetism may be deteriorated. If too much is added The magnetic flux density can be reduced by promoting the formation of ⁇ 111 ⁇ texture which is disadvantageous to magnetism. Therefore, the above range can be added. And more specifically 0.2 to 1.4% by weight.
  • Carbon (X) causes self aging and combines with other impurity elements to generate carbides, thereby deteriorating the magnetic properties. Therefore, it is preferable to limit the carbon (X) to 0.005 wt% or less, more specifically 0.004 wt% or less.
  • Nitrogen forms fine and long silicate precipitates in the base material of the beads, and forms fine nitrides by binding with other impurities to inhibit grain growth and deteriorate iron loss. Therefore, it is preferable that the content is 0.005 wt% or less, more specifically 0.003 wt% It is better to limit. - 0.005% by weight or less
  • Sulfur forms a fine sulphide inside the base material to suppress grain growth and worsens the iron loss. Therefore, it is preferably as low as 0.005 wt% or less, more preferably 0.003 wt% or less.
  • Chromium () forms a coarse carbide by bonding with (:) at the temperature of about 7001: or less. If too little is added, the carbide coarsening effect may be insufficient. If too much is added, the number of carbides may excessively increase during intermediate annealing, which may deteriorate the magnetic properties. And thus may include the ranges described above. And more specifically 0.015 to 0.057% by weight.
  • Phosphorus is segregated on the surface or grain boundaries of the base material to reduce surface energy and grain boundary energy to inhibit precipitation and retard ⁇ 111 ⁇ ⁇ 11 ⁇ > recrystallization and develop a magnetically favorable texture. If the amount of the additive is too small, the effect may be significantly deteriorated. If the amount of I 5 added is too large, the amount of segregation may increase excessively and the surface quality may deteriorate and production may become difficult. therefore 2019/132375 1 »(: 1 ⁇ ⁇ 2018/016136
  • the moiety can be added. More specifically, it may include 0.003 to 0.07% by weight.
  • iron in the above-mentioned range. More specifically, it may contain 0.003 to 0.0075% by weight.
  • the non-oriented electrical steel sheet according to one embodiment of the present invention may further include at least one of 0.003 wt% or less, 0.003 wt% or less, 0.003 wt% or less, and 0.003 wt% or less.
  • V Niobium (), titanium (), vanadium (V), and zirconium (!) are very strong elements in the formation of in-situ quartz and form fine carbides or nitrides in the base material, .
  • V can each include the above-described range loader. More specifically, it may further comprise at least one of: 0.003% by weight or less, 0.003% by weight or less, V: 0.003% by weight or less, and 0.003% by weight or less.
  • the remainder of the present invention is iron.
  • impurities which are not intended from the raw material or the surrounding environment may be inevitably mixed, so that this can not be excluded.
  • the non-oriented electrical steel sheet may have an aggregate area fraction of less than 10% in a direction within 15 DEG from ⁇ 111 ⁇ ⁇ 11 >.
  • 11 is an arbitrary number, meaning that the normal direction (and direction) of the printing surface is parallel to ⁇ 111> and the rolling direction (direction) is parallel to ⁇ 11 > do. That is, the ⁇ 111 axis of the crystal grain is in the range of 15 ° from the normal axis (direction) of the plate surface of the steel sheet.
  • the total area may be 1) plane.
  • the aggregate texture area fraction of the orientation within 15 DEG from the ⁇ 111 ⁇ < More specifically, it may include 6.5 to 8.8% of the texture area fraction of the orientation within 15 DEG from ⁇ 111 ⁇ < 2 >.
  • Non-oriented electrical steel sheet according to one embodiment of the present invention can be 70 to 150 / Fail average grain diameter.
  • the magnetic properties of the non-oriented electrical steel sheet are superior in the above-mentioned range.
  • the non-oriented electrical steel sheet according to an embodiment of the present invention may have a thickness of 0.1 to 0.65.
  • the non-oriented electrical steel sheet according to one embodiment of the present invention has an improved magnetic property.
  • the magnetic flux density 850 induced in the magnetic field of 5000 111 is 1.681 or more.
  • the iron loss of 5/50 when the magnetic flux density of the liver is induced to 5 frequencies can be less than 2.2 ⁇ / ⁇ . More specifically, a magnetic flux density of 85 ° is 1.69 to 1.7 liver, and an iron loss of 15/50 may be 1.8 to 2.1 / 13 ⁇ 4.
  • a method of manufacturing a non-oriented electrical steel sheet according to an embodiment of the present invention includes the steps of: manufacturing a slab; Heating the slab; Hot rolling the slab to produce a hot rolled sheet; 1.
  • a method of manufacturing a cold-rolled steel sheet comprising the steps of: Intermediate annealing the primary cold rolled sheet; A step of secondary cold-rolling the primary cold-rolled sheet at a reduction ratio of 1 to 6% to produce a secondary cold-rolled sheet; And final annealing the secondary cold-rolled sheet.
  • the slab is heated. Specifically, the slab is charged into a heating furnace and heated to 12001 or lower. When heated at a temperature exceeding 1200 ° C., the precipitate is redissolved and can be precipitated finely after hot rolling. More specifically, it can be heated to 1100 to 12001 ° C.
  • the heated slab is rolled between 2 and 2.3 "
  • the finish rolling temperature is 800 Or more. Specifically, 800 to 1000 Can be.
  • the step of pickling the hot-rolled sheet may be further included.
  • the primary cold rolling can be started within 1 second after the step of producing the hot rolled sheet, without annealing the hot rolled sheet before pickling or pickling.
  • the rolling rate of the primary cold rolling is relatively low, and annealing of the hot-rolled sheet can be omitted.
  • the hot-rolled sheet is first rolled to form a primary cold-rolled sheet. It can be applied differently depending on the thickness of the hot rolled sheet, but it can be subjected to primary cold rolling so as to have a final thickness of 0.2 to 0.65 by applying a reduction ratio of 70 to 95%.
  • the primary cold-rolled sheet subjected to the intermediate annealing is secondary cold-rolled at a reduction ratio of 1 to 6% to produce a secondary cold-rolled sheet.
  • a second cold rolling step by adding a second cold rolling step, it is possible to suppress the texture of the orientation within 15 DEG from ⁇ 111 ⁇ ⁇ 11 >. If the reduction rate is too small, the above-mentioned effect may not be sufficient. If the reduction rate is too large, a large amount of texture is formed in a direction within 15 DEG from ⁇ 111 ⁇ ⁇ 11 >. More specifically, the reduction ratio of the secondary cold rolling can be 1.5 to 5.5%.
  • the secondary cold-rolled sheet is finally annealed at 900 ° or higher.
  • the average grain size can be 70 to 150 II.
  • the final annealing temperature may be 910 to 10501 :.
  • all of the processed structures formed in the first and second cold rolling stages may be recrystallized (i.e., 99% or more).
  • the final annealing time may be from 50 to 150 seconds.
  • the slabs were prepared as in Table 1 below and containing the remainder 6 and the inevitable impurities.
  • the slab was heated to 1150 DEG C and hot rolled at a finishing temperature of 880 DEG C to produce a hot rolled sheet having a thickness of 2.0 mm.
  • the hot-rolled hot-rolled sheet was subjected to pickling and primary cold rolling, omitting the hot-rolled sheet and annealing.
  • intermediate annealing was carried out at the temperatures listed in Table 2 for 120 seconds
  • secondary cold rolling was carried out at a reduction ratio set forth in Table 2 below to a thickness of 0.35 ⁇ . Thereafter, final annealing was performed at the temperatures listed in Table 2 for 90 seconds.
  • the fraction of ⁇ 111 ⁇ ⁇ 11 ⁇ > is measured by measuring the area of the specimen with 10 or more crystal grains in an area containing more than 3000 crystal grains.
  • the fraction of the point having the ⁇ 111 ⁇ Respectively.
  • the grain size of the grain was measured by taking an area of more than 1500 crystal grains in 10 sections of the specimen with an optical microscope (measured area / number of crystal grains ⁇ 0.5).
  • the magnetic properties such as magnetic flux density and iron loss were measured for each of the specimens in width 60.
  • 15/50 is the iron loss when the magnetic flux density of 1.51 is induced at a frequency of 50/4, and the magnetic pole 50 represents the magnetic flux density induced at the magnetic field of 5000 show. 2019/132375 1 »(: 1/10 ⁇ 018/016136
  • ⁇ 111 ⁇ ⁇ N ratio exceeded 10% or the crystal grains did not grow sufficiently and the magnetic properties were weakened.
  • the content of Si exceeded the scope of the present invention and the fraction of ⁇ 111 ⁇ ⁇ 1 ⁇ exceeded 10%, and as a result, 2019/132375 1 »(: 1 ⁇ ⁇ 2018/016136
  • the character was inferior.

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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)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

L'invention, selon un mode de réalisation, concerne une feuille d'acier électrique non orientée, qui comprend, en % en poids, de 2,6 à 3,6 % de Si, de 0,2 à 1,3 % de Al, de 0,1 à 1,5 % de Mn, 0,005 % ou moins de C (à l'exclusion de 0 %), 0,005 % ou moins de N (à l'exclusion de 0 %), 0,005 % ou moins de S (à l'exclusion de 0 %), de 0,01 à 0,06 % de Cr, de 0,003 à 0,08 % de P, de 0,001 à 0,008 % de Cu et le reste étant du Fe et des impuretés inévitables, la fraction de surface à texture dans 15° d'azimut à partir de {111}<uvw> étant de 10 % ou moins.
PCT/KR2018/016136 2017-12-26 2018-12-18 Feuille d'acier électrique non orientée et son procédé de fabrication Ceased WO2019132375A1 (fr)

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KR1020170180051A KR102087182B1 (ko) 2017-12-26 2017-12-26 무방향성 전기강판 및 그 제조방법
KR10-2017-0180051 2017-12-26

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KR102731573B1 (ko) * 2019-11-15 2024-11-21 닛폰세이테츠 가부시키가이샤 무방향성 전자 강판의 제조 방법

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Publication number Priority date Publication date Assignee Title
JP2006265720A (ja) * 2005-02-23 2006-10-05 Nippon Steel Corp 圧延方向の磁気特性に優れた無方向性電磁鋼板とその製造方法
KR20120074394A (ko) * 2010-12-28 2012-07-06 주식회사 포스코 투자율이 우수한 세미프로세스 무방향성 전기강판 및 그 제조방법
KR20140133100A (ko) * 2013-05-09 2014-11-19 주식회사 포스코 무방향성 전기강판 및 그 제조방법
KR20160073222A (ko) * 2014-12-16 2016-06-24 주식회사 포스코 무방향성 전기강판 및 그 제조방법
KR20160078177A (ko) * 2014-12-24 2016-07-04 주식회사 포스코 무방향성 전기강판 및 그 제조방법

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