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WO1993013231A1 - Tole d'acier electromagnetique non orientee presentant d'excellentes caracteristiques magnetiques et procede d'elaboration - Google Patents

Tole d'acier electromagnetique non orientee presentant d'excellentes caracteristiques magnetiques et procede d'elaboration Download PDF

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Publication number
WO1993013231A1
WO1993013231A1 PCT/JP1992/001663 JP9201663W WO9313231A1 WO 1993013231 A1 WO1993013231 A1 WO 1993013231A1 JP 9201663 W JP9201663 W JP 9201663W WO 9313231 A1 WO9313231 A1 WO 9313231A1
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WO
WIPO (PCT)
Prior art keywords
steel sheet
oriented electrical
electrical steel
random
product
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/JP1992/001663
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English (en)
Japanese (ja)
Inventor
Tomoji Kumano
Takeshi Kubota
Hiroaki Masui
Takeaki Takeshita
Kenji Kosuge
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.)
Nippon Steel Corp
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Nippon Steel Corp
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Filing date
Publication date
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Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of WO1993013231A1 publication Critical patent/WO1993013231A1/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
    • 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
    • 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
    • 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
    • H01F1/14791—Fe-Si-Al based alloys, e.g. Sendust

Definitions

  • the present invention relates to a non-oriented electrical steel sheet having extremely high magnetic flux density in all circumferential directions and low iron loss, and a method for manufacturing the same.
  • the cooling and cooling body surface is moved and renewed to solidify into a green strip, and then the cold-rolled steel strip is cold-rolled to a predetermined thickness, and then subjected to finish annealing to form a non-oriented electrical steel sheet.
  • a way to get it was developed.
  • the texture after the final annealing becomes the so-called Goss orientation ⁇ 1101 ⁇ 001> or (1111 ⁇ 112>), but the U001 ⁇ Gv ff > orientation Since the magnetism in the entire circumferential direction is inferior to that of, the improvement of the magnetic properties of the entire circumference, especially the improvement of the magnetic flux density, is limited.
  • An object of the present invention is to provide a non-oriented electrical steel sheet having a low iron loss in all circumferential directions and an extremely high magnetic flux density, and a method for manufacturing the same.
  • FIG. 1 is a chart showing the relationship between the cold rolling reduction and B (T) in all circumferential directions.
  • FIG. 2 is a (1001 positive electrode spot diagram) of the product of the present invention.
  • FIG. 3 is a (100) positive electrode spot diagram of another product of the present invention.
  • the present invention relates to a non-oriented electrical steel sheet having a thickness of 20 strokes to 1.20 pieces, in which the structure after primary recrystallization has a U0D1 ⁇ 0vw> texture and the ⁇ 100 ⁇ plane strength parallel to the rolling plane. It is characterized by having a random cube texture that is at least twice as large as the random azimuthal strength, thereby providing extremely excellent magnetic characteristics in all circumferential directions. Property is obtained.
  • the above steel sheet shall contain, by weight%, Si ⁇ 4.0%, A ⁇ 2. Q%, and other elements normally contained in non-oriented electrical steel sheets, with the balance being Fe and impurities.
  • the present invention provides, in weight%, S i ⁇ ⁇ ⁇ %, A II ⁇ 2.0%.
  • a non-directional electromagnetic process comprising a step of solidifying with the surface of a cooling body to be moved and renewed into a steel strip, a step of cold-rolling the steel strip to a predetermined thickness, and a step of finish annealing.
  • the method for producing a steel sheet is characterized in that the cold rolling is performed at a rolling reduction of 5% or more and less than 40%.
  • the content of S i and A above can be either (S i + 2 A)> 2.5% without transformation or (S i + 2 A) ⁇ 2.5% with transformation. Cases can also be targeted.
  • the inventors have conducted intensive studies to solve the technical problems of the present invention, and as a result, have confirmed the existence of a random cube base structure, which has been conventionally regarded as an ideal texture of non-oriented electrical steel sheets. At the same time, it was proved that this random cube was an ideal base structure of non-oriented electrical steel sheets, and the present invention was completed.
  • the random cube is obtained by directly forming a thin steel strip from molten steel and then appropriately setting the cold rolling rate, thereby assembling the product after finish annealing.
  • the structure can be controlled, and as a result, a non-oriented electrical steel sheet with extremely high magnetic flux density and low iron loss value has been successfully obtained.
  • Non-oriented electrical steel sheets are mainly used for rotating machines. From the viewpoint of stabilization of magnetic properties, it is required that the magnetic properties do not deteriorate (magnetic aging) during use.
  • the C content is preferably as low as possible, and is desirably 0.005% or less.
  • the present inventors control the cooling rate of the non-oriented electrical steel sheet having the phase transformation during the cooling transformation (r ⁇ n) (hereinafter referred to as “a treatment”), so that the magnetic flux density is extremely high and the iron loss value is reduced
  • a treatment control the cooling rate of the non-oriented electrical steel sheet having the phase transformation during the cooling transformation
  • C can be made harmless, so that the allowable range can be made up to 0.05%.
  • N may be (L 010% or less.
  • Conventional non-directional electromagnetic In the steel sheet manufacturing method, when N has a high content like S, it temporarily re-dissolves during slab heating during hot rolling, and precipitates such as A £ N and MnS are formed during hot rolling.
  • the so-called pinning effect which hinders the growth of recrystallized grains during finish annealing or hinders the movement of the domain wall when the product is magnetized, is a factor that hinders the reduction of iron loss in the product. Therefore, the N content is preferably as low as possible and is set to 0.005% or less.
  • cooling conditions equivalent to the y treatment are applied, N can be rendered harmless, so that up to 0.050% is acceptable.
  • S is an element that is inevitably mixed in the steel smelting stage. If the content increases, the workability deteriorates, so the content should be 0.001% or less, preferably 0.005% or less, but if cooling conditions equivalent to 7 treatments are applied, S Can be made harmless, so that up to 0.020% is acceptable.
  • Si is added to increase the specific resistance of a steel sheet and reduce eddy current loss. If Si is added in excess of 4.0%, workability will be extremely deteriorated, making cold rolling difficult and unsuitable for mass production.
  • S is also added to increase the specific resistance of the steel sheet and reduce eddy current loss.
  • up to 2.0% of A is conventionally added to non-oriented electrical steel sheets.
  • the maximum is set to 2.0% in consideration of cold rolling properties like Si.
  • the above S i .Ai includes both the range where (31 + 28) is more than 2.5% without transformation and the range where (S i + 2A ⁇ ) is less than or equal to 2.5%.
  • N If the content of Mn is less than 0.1%, the processability of the product deteriorates. It is also added to make S harmless. However, when the addition amount of Mn exceeds 2.0%, the magnetic flux density of the product is significantly deteriorated, so that Mn is preferably set to 2.0%.
  • P is added in a range of up to 0.1% in order to improve the punchability of the product. If ⁇ ⁇ 0.2%, there is no problem from the viewpoint of the magnetic properties of the product.
  • ⁇ is added as necessary to detoxify ⁇ . When added, it is necessary to balance with the amount of ⁇ , and the maximum content should be 0.005%. Since N can be rendered harmless by applying the same cooling conditions as in the treatment with iron, melting the ultra-low nitrogen steel and adding an appropriate amount of N, it is not necessary to add N in this case.
  • Ni, Cr, Sb, Sn and Cu may contain one or more of them as necessary, and their contents are appropriately selected depending on the purpose.
  • the present invention reduces the product thickness to 0.2! ) To 1.20 hidden.
  • the product thickness of non-oriented electrical steel sheets conventionally produced in large quantities is 0.20 to 1. DO. Batadais with a height of less than 0.20 are also exceptionally used for medium and high frequency regions.
  • the lower limit of the plate thickness is 0.20 images that can be mass-produced.
  • the product application below 0.20 mm is in the region above QHz, where iron loss is largely affected by eddy current loss and hysteresis loss contributed by texture is small. This is related to the reason for limiting the thickness. In addition, the upper limit of 1.20 is stated. Even if the thickness is further increased, the usefulness of the random cube texture does not change, but it exceeds the current actual processing range. On the other hand, the increase in iron loss is contrary to the current trend of high efficiency and energy saving.
  • the preferred range of product thickness is 0.35 to 0.80, which is often used in practice.
  • a random cube is formed by primary recrystallization regardless of such a method. Specific manufacturing for this The method is described below.
  • a cast steel strip obtained by being solidified by a moving and renewed cooling body surface is cold-rolled at an appropriate rolling reduction.
  • this steel strip is rolled at a relatively high cold rolling reduction, the magnetic flux density increases, but the columnar crystals formed during the solidification process are considerably broken at this high rolling reduction.
  • the recrystallized texture of the product sheet is approximately the same as the ⁇ 111> axial density parallel to the steel sheet normal and the ⁇ 100> glaze density parallel to the steel sheet normal, making it ideal for non-oriented electrical steel sheets. It is not a simple texture.
  • the present inventors have conducted intensive studies and found that when the cold rolling reduction was set to less than 40% (preferably, less than 30%), the columnar crystals formed at the time of fabrication were used as nuclei, and after finish annealing.
  • the recrystallized texture of was found to be almost perfect ⁇ ii ⁇ 0vw> (random cube).
  • the product is manufactured with the product thickness.
  • the surface properties are not suitable for the product, but also the magnetic properties as shown in Fig. 1 The characteristics themselves are not so good.
  • Figure 1 shows the production of a non-oriented electrical steel sheet which is solidified by the moving and renewed cooling body surface to form a ⁇ steel strip, and then cold rolled to a predetermined thickness and then finish-annealed.
  • the relationship between the cold rolling reduction and the magnetic flux density [B (T)] was shown.
  • the product thickness is not necessarily 0.50 mm, an extremely excellent magnetic flux density is shown by setting the cold rolling reduction to 5 to 40%.
  • the molten steel of the components shown in Table 1 (consisting of the balance Fe and unavoidable impurities) is directly solidified on the surface of the cooling body to be renewed.
  • the magnetic properties were measured by the Epstein-Lead method. These values were compared with those of the comparative method where the cold rolling reduction was 40% or more (steel thickness was 2.0 turns and 1.5 nmi).
  • the present invention 0.0069 2, 9 0.22 0, 019 0.0018 0.26 0.0036 0.56 0.50 11 2.57
  • the present invention 0.0069 2.9 0.22 0, 019 0.0018 0, 26 0, 0036 0.62 0.50 19 2.39 1J36 Comparative material 0.0050 3.0 0.2 ⁇ 0.018 0, 0008 0.29 0.0030 2.0 0, 50 15 3.50 1.648 Specific drawn material 0, 0050 3.0 0, 21 0.018 0.0008 0, 29 0.0030 1.5 0.50 6? 3.40 1.6
  • the magnetic properties are the circumferential properties (rolling direction, 22. direction, 45 degree direction, 67.5 direction, 90 ° ⁇ direction, 112.5 direction, 135 degree direction, average of 8 directions of 15U degree direction, each angle from the cold rolling direction Angle).
  • the solidified steel strip is solidified by the surface of the cooling body that moves and renews in this manner, and then the steel strip is cold-rolled to a predetermined thickness and then finish-annealed.
  • the rolling reduction is 5% or more and less than 40% in the cold rolling, a non-oriented silicon steel sheet having extremely excellent magnetic properties in all circumferential directions can be obtained as compared with the case where the cold rolling reduction is high.
  • FIG. 2 shows the texture of the product sheet after finish annealing obtained in the example of the present invention. A very nice, so-called random cube is thus obtained. This is ideal for non-oriented electrical steel sheets.
  • the molten steel of the composition shown in Table 2 (consisting of the balance Fe and unavoidable impurities) is solidified on the surface of the cooling body that moves and renews to obtain steel strips of 0.56 recitation, 0.62 0 and 0.70 ⁇ . Was. Then, it was pickled and cold rolled to the thickness of 50).
  • the cold-rolled steel sheet was degreased and annealed in a continuous annealing furnace at 850 ° C. for 30 seconds in a dry atmosphere of H 2: 5% and N 2 : 95%.
  • the magnetic properties are all-around properties (rolling direction, 22, 5 direction, 45 direction, 67.51 ⁇ direction, 90 degree direction, 112.5 direction, 135 degree direction, average of 8 directions of 15 U degree direction, each angle is cold Angle from the rolling direction).
  • Example 1 the forged steel strip solidified by the cooling body surface to be moved and renewed is cold-rolled at a rolling ratio of 5% or more and less than 40%.
  • a non-oriented electrical steel sheet having extremely excellent magnetic properties in all circumferential directions as compared with a case where the rolling reduction is high can be obtained.
  • FIG. 3 shows the texture of the product sheet after finish annealing obtained in the example of the present invention.
  • a random cup that can be said to be ideal has been obtained.

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

Abstract

Tôle d'acier électromagnétique non orientée renfermant des cubes aléatoires et présentant d'excellentes caractéristiques magnétiques sur toute la périphérie; et procédé d'élaboration de telles tôles. Tôle d'acier électromagnétique non orientée de 0,20 à 1, 20 mm d'épaisseur, de structure {100} <Ovw> après réalisation d'une opération de recrystallisation primaire, renfermant de manière aléatoire des cubes dont la résistance de surface {100}, parallèle à la surface de laminage, est deux fois plus élevée, par rapport aux cubes disposés de manière aléatoire que celle d'une tôle d'acier conventionnelle. Le procédé d'élaboration de telles tôles comprend les étapes de solidification d'un acier fondu renfermant essentiellement Si « 4,0 % et Al « 2,0 %, sous l'effet d'un corps de refroidissement dont la surface se renouvelle par déplacement, et par un laminage à froid dans un bain acide compris entre 5 et 40 %, un autre laminage à froid et un finissage par recuit. De cette manière, il se forme des cubes {100} <Ovw> conformés de manière pratiquement idéale et l'on obtient aisément un produit aux excellentes caractéristiques magnétiques sur toute la périphérie.
PCT/JP1992/001663 1991-12-27 1992-12-18 Tole d'acier electromagnetique non orientee presentant d'excellentes caracteristiques magnetiques et procede d'elaboration Ceased WO1993013231A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP3/347162 1991-12-27
JP34716291 1991-12-27
JP4/13455 1992-01-28
JP1345592 1992-01-28

Publications (1)

Publication Number Publication Date
WO1993013231A1 true WO1993013231A1 (fr) 1993-07-08

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WO (1) WO1993013231A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003076673A3 (fr) * 2002-03-11 2004-04-22 Usinor Tôle d'acier laminé à chaud à très haute résistance et de faible densité, et procédé de fabrication
CN103649345A (zh) * 2012-03-27 2014-03-19 许南会 磁特性优秀的无取向电工钢板及其制备方法
EP2540845A4 (fr) * 2010-02-26 2016-03-09 Nat Univ Corp Yokohama Nat Uni Matériau métallique qui est une solution solide d'une structure cubique à corps centré (bcc) ayant une orientation contrôlée des axes cristallins<001>, et son procédé de fabrication

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4319889B2 (ja) * 2002-12-06 2009-08-26 新日本製鐵株式会社 全周磁気特性の優れた無方向性電磁鋼板及びその製造方法
JP4648910B2 (ja) 2006-10-23 2011-03-09 新日本製鐵株式会社 磁気特性の優れた無方向性電磁鋼板の製造方法
KR101227767B1 (ko) * 2012-09-26 2013-01-29 허남회 자성특성이 우수한 （１００）〔０ｖｗ〕 무방향성 전기강판
CN108277335B (zh) * 2018-01-29 2019-04-12 东北大学 一种增强薄带连铸无取向硅钢{100}再结晶织构的方法
KR102283222B1 (ko) * 2021-05-03 2021-07-29 주식회사 썸백 (001) 집합조직으로 구성된 전기강판 및 그의 제조방법
KR102283225B1 (ko) * 2021-05-03 2021-07-29 주식회사 썸백 (001) 집합조직으로 구성된 전기강판 및 그의 제조방법

Citations (5)

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JPS5732327A (en) * 1980-08-07 1982-02-22 Kawasaki Steel Corp Production of intrasurface nondirectional high silicon streel strip having superior magnetic characteristics
JPS5794517A (en) * 1980-12-03 1982-06-12 Kawasaki Steel Corp Method for rolling treatment which improves magnetic characteristic of quenched strip of high silicon steel
JPS6021328A (ja) * 1983-07-13 1985-02-02 Matsushita Electric Ind Co Ltd ｛１００｝「やま」
JPS619520A (ja) * 1984-06-22 1986-01-17 Kawasaki Steel Corp 高抗張力無方向性急冷薄帯の製造方法
JPS6141719A (ja) * 1984-08-03 1986-02-28 Kawasaki Steel Corp 放電灯安定器用の高けい素鋼急冷薄帯の製造方法

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JPH0324250A (ja) * 1989-06-19 1991-02-01 Sumitomo Metal Ind Ltd 面内異方性の小さい無方向性電磁鋼板

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732327A (en) * 1980-08-07 1982-02-22 Kawasaki Steel Corp Production of intrasurface nondirectional high silicon streel strip having superior magnetic characteristics
JPS5794517A (en) * 1980-12-03 1982-06-12 Kawasaki Steel Corp Method for rolling treatment which improves magnetic characteristic of quenched strip of high silicon steel
JPS6021328A (ja) * 1983-07-13 1985-02-02 Matsushita Electric Ind Co Ltd ｛１００｝「やま」
JPS619520A (ja) * 1984-06-22 1986-01-17 Kawasaki Steel Corp 高抗張力無方向性急冷薄帯の製造方法
JPS6141719A (ja) * 1984-08-03 1986-02-28 Kawasaki Steel Corp 放電灯安定器用の高けい素鋼急冷薄帯の製造方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003076673A3 (fr) * 2002-03-11 2004-04-22 Usinor Tôle d'acier laminé à chaud à très haute résistance et de faible densité, et procédé de fabrication
US7416615B2 (en) 2002-03-11 2008-08-26 Usinor Very-high-strength and low-density, hot-rolled steel sheet and manufacturing process
KR100986697B1 (ko) * 2002-03-11 2010-10-08 아르셀러 프랑스 초고강도 및 저밀도 열연강판 및 그 제조방법
EP2540845A4 (fr) * 2010-02-26 2016-03-09 Nat Univ Corp Yokohama Nat Uni Matériau métallique qui est une solution solide d'une structure cubique à corps centré (bcc) ayant une orientation contrôlée des axes cristallins<001>, et son procédé de fabrication
CN103649345A (zh) * 2012-03-27 2014-03-19 许南会 磁特性优秀的无取向电工钢板及其制备方法

Also Published As

Publication number Publication date
JPH05306438A (ja) 1993-11-19
JP2708682B2 (ja) 1998-02-04

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