Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Miho Tomita

Tesshu Murakawa

Yoshiaki Natori

Hiroyoshi Yashiki

Hiroshi Fujimura

Kazutoshi Takeda

Takuya Matsumoto

Hiroaki Sakamoto

Tooru Inaguma

Satoshi Kano

Masahito Kamikawabata

Takeaki Wakisaka

Ryu Hirayama

Yasuo Ohsugi

Hiroki Hori

Yuuya Gohmoto

O Uyama

The present invention is a stator core () including a plurality of split cores (), in which the plurality of split cores () are configured by laminating core pieces () made of an electrical steel sheet, the electrical steel sheet is a predetermined electrical steel sheet, and, in the core pieces () of at least one split core () in the plurality of split cores (), the radial directions of teeth () and extension directions of core backs () are all along a direction in which magnetic characteristics of the electrical steel sheet are excellent.

Stator core and rotary electric machine

A non-oriented electrical steel sheet including a base metal that has a chemical composition including, in mass %, C: 0.0010 to 0.0040%, Si: 3.5 to 4.9%, Mn: 0.05 to 0.20%, Al: 0.05 to 0.45%, P: 0.030% or less, S: 0.0030% or less, N: 0.0030% or less, O: 0.0100 to 0.0400%, Ca: less than 0.0010%, Ti: less than 0.0050%, Nb: less than 0.0050%, Zr: less than 0.0050%, V: less than 0.0050%, Cu: less than 0.20%, Ni: less than 0.50%, Sn: 0 to 0.05%, Sb: 0 to 0.05%, and a balance: Fe and impurities, and satisfying [4.0≤Si+Al≤5.0], in which the base metal has an O content of less than 0.0050% in a region excluding a portion from a surface of the base metal to a position of 10 μm in a depth direction of the base metal.

Non-oriented electrical steel sheet and method of manufacturing the same

A laminated core () has a plurality of legs having an extension direction in a direction perpendicular to a lamination direction of electrical steel sheets and a plurality of yokes having an extension direction in a direction orthogonal to the lamination direction of the electrical steel sheets and the extension direction of the legs, and, in the same position of the electrical steel sheet in the lamination direction, at least a partial region of the legs and at least a partial region of the yokes are configured by the same electrical steel sheet. The electrical steel sheet is disposed such that a first direction of directions of easy magnetization of the electrical steel sheet is along the extension direction of the legs and a second direction of the directions of easy magnetization of the electrical steel sheet is along the extension direction of the yokes.

Laminated core and electrical device

This electrical steel sheet contains, as a chemical composition, by mass %, C: 0.0035% or less, Si: 2.00% to 3.50%, Mn: 2.00% to 5.00%, P: 0.050% or less, S: 0.0070% or less, Al: 0.15% or less, N: 0.0030% or less, Ni: 0% to 1.00%, Cu: 0% to 0.10%, and a remainder: Fe and impurities, in which an X-ray random intensity ratio in a {100} <011> crystal orientation on a sheet surface is 15.0 to 50.0, and magnetic flux densities in 0°, 22.5°, and 45° directions from a rolling direction each satisfy [1.005×(B(0°)+B(45°))/2≥B(22.5°)].

Electrical steel sheet and method for manufacturing same

A non-oriented electrical steel sheet has a chemical composition containing, in terms of % by mass, C: 0.0015% or less and Si: 2.5 to 4.0% and having an average crystal grain size of 10 to 40 μm, and an internal oxidation layer having a thickness of 0.5 to 3.0 μm present in a sheet thickness direction of a surface thereof.

Non-oriented electrical steel sheet, segmented stator, and rotating electrical machine

The present invention is a stator core having a plurality of laminated electrical steel sheets, in which, among a plurality of teeth (to) of the stator core, a width of teeth along a direction in which magnetic characteristics are excellent may be narrower than a width of teeth along a direction in which the magnetic characteristics are poor.

Stator core, rotary electric machine, and design method for stator core

What is provided is a non-oriented electrical steel sheet having a chemical composition in which, by mass %, C: 0.010% or less, Si: 1.50% to 4.00%, sol. Al: 0.0001% to 1.0%, S: 0.010% or less, N: 0.010% or less and one or a plurality of elements selected from the group consisting of Mn, Ni, Co, Pt, Pb, Cu and Au: 2.50% to 5.00% in total with a remainder including Fe and impurities, in which a recrystallization rate is 1% to 99% in a metallographic structure, a sheet thickness is 0.50 mm or less, and, in the case of measuring a magnetic flux density B50 after annealing the non-oriented electrical steel sheet at 800° C. for two hours, a magnetic flux density B50 in a 45° direction with respect to a rolling direction is 1.75 T or more.

Non-oriented electrical steel sheet

What is provided is a non-oriented electrical steel sheet having a chemical composition in which, by mass %, C: 0.010% or less, Si: 1.50% to 4.00%, sol. Al: 0.0001% to 1.0%, S: 0.010% or less, N: 0.010% or less, one or a plurality of elements selected from the group consisting of Mn, Ni, Co, Pt, Pb, Cu and Au: 2.50% to 5.00% in total are contained and a remainder includes Fe and impurities, in which a sheet thickness is 0.50 mm or less, and, in an arbitrary cross section, when an area ratio of {100} crystal grains is indicated by Sac, an area ratio of {110} crystal grains is indicated by Sag, and an area ratio of the {100} crystal grains in a region of up to 20% from a side where a KAM value is high is indicated by Sbc, Sac>Sbc>Sag and 0.05>Sag are satisfied.

This non-oriented electrical steel sheet includes a base metal having a predetermined chemical composition satisfying the expression [Si+sol. Al+0.5×Mn≥4.3], and an average grain size of the base metal is more than 40 μm and 120 μm or less.

An electrical steel sheet () is formed such that centerlines of four magnetic poles (salient poles) of a rotor core () coincide with a direction of easy magnetization (ED) or (ED). In addition, the electrical steel sheets () are laminated such that the directions of easy magnetization (ED) and (ED) are aligned.

Rotor core, rotor, and rotating electric machine

This non-oriented electrical steel sheet includes a base metal having a predetermined chemical composition satisfying the expression [Si+0.5×Mn≥4.3], and an average grain size of the base metal is more than 40 μm and 120 μm or less.

Provided are a non-oriented electrical steel sheet with which it is possible to improve steel sheet transferability even when punching is performed successively at high speed, and a method of manufacturing a stacked core using the same. The non-oriented electrical steel sheet contains, by mass percent, Si: 2.0 to 5.0%, Mn: 0.4 to 5.0%, Al&#x2264;3.0%, C: 0.0008 to 0.0100%, N&#x2264;0.0030%, S&#x2264;0.0030%, and Ti&#x2264;0.0060%, wherein the product of the contents of Mn and C is 0.004 to 0.05 mass %, the yield strength in rolling direction is more than or equal to 600 MPa, and the Young's modulus is more than or equal to 200 GPa. In the method of manufacturing a stacked core, when manufacturing a stacked core using a progressive die, the steel sheet transfer speed V (m/s) satisfies expression (1). V: Vto V(1) V=( 1/25)&#x221a;(t&#xd7;E&#xd7;YS) (2) V=( 1/25)&#x221a;(t&#xd7;120000) (3) t: Steel sheet thickness (mm), E: Young's ratio (GPa), YS: Yield strength (MPa).

Non-oriented electrical steel sheet and method of manufacturing stacked core using same

A non-oriented electrical steel sheet includes, as a chemical composition, by mass %: C: 0.0015% to 0.0040%; Si: 3.5% to 4.5%; Al: 0.65% or less; Mn: 0.2% to 2.0%; Sn: 0% to 0.20%; Sb: 0% to 0.20%; P: 0.005% to 0.150%; S: 0.0001% to 0.0030%; Ti: 0.0030% or less; Nb: 0.0050% or less; Zr: 0.0030% or less; Mo: 0.030% or less; V: 0.0030% or less; N: 0.0010% to 0.0030%; O: 0.0010% to 0.0500%; Cu: less than 0.10%; Ni: less than 0.50%; and a remainder including Fe and impurities, in which a product sheet thickness is 0.10 mm to 0.30 mm, an average grain size is 10 &#x3bc;m to 40 &#x3bc;m, an iron loss W10/800 is 50 W/Kg or less, a tensile strength is 580 MPa to 700 MPa, and a yield ratio is 0.82 or more.

A cast slab containing C: less than 0.02 mass % and made of an Fe-based metal of an &#x3b1;-&#x3b3; transforming component is subjected to hot rolling at a temperature of an A3 point or higher and is subjected to &#x3b1;-region rolling at a temperature of 300&#xb0; C. or higher and lower than the A3 point, and thereby a base metal sheet having a {100} texture in a surface layer portion is fabricated. Then, by performing a heat treatment under predetermined conditions, an Fe-based metal sheet is obtained in which a Z value is not less than 2.0 nor more than 200 when intensity ratios of respective {001}&#x3c;470&#x3e;, {116}&#x3c;6 12 1&#x3e;, and {223}&#x3c;692&#x3e; directions in a sheet plane by X-ray diffraction are set to A, B, and C respectively and Z=(A+0.97B)/0.98C is satisfied.

Fe-based metal sheet and manufacturing method thereof

On at least one surface of a base metal plate () of an &#x3b1;-&#x3b3; transforming Fe or Fe alloy, a metal layer () containing ferrite former is formed. Next, the base metal plate () and the metal layer () are heated to an A3 point of the Fe or the Fe alloy, whereby the ferrite former are diffused into the base metal plate () to form an alloy region () in a ferrite phase in which an accumulation degree of {200} planes is 25% or more and an accumulation degree of {222} planes is 40% or less. Next, the base metal plate () is heated to a temperature higher than the A3 point of the Fe or the Fe alloy, whereby the accumulation degree of the {200} planes is increased and the accumulation degree of the {222} planes is decreased while the alloy region () is maintained in the ferrite phase.

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Tokyo, Japan

Miho Tomita