Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Kabushiki Kaisha Daini Seikosha

Toagosei Company, Ltd.

Nittetsu Plant Designing Corporation

Thyssenkrupp Electrical Steel Gmbh

Kazutoshi Takeda

Hiroyasu Fujii

Shuichi Yamazaki

Shinsuke Takatani

Ichiro Tanaka

Yoshiaki Natori

Ryu Hirayama

Masaru Takahashi

Takashi Kataoka

Hiroyoshi Yashiki

Minako Fukuchi

Takuya Matsumoto

Satoshi Arai

Kenji Kosuge

Hirotoshi Tada

Miho Tomita

Jun Maki

Fumiaki Takahashi

Kiyokazu Ishizuka

Hiroyuki Mimura

Hiroshi Fujimura

Yutaka Matsumoto

Tomoya Suenaga

Eiichi Nanba

Masafumi Miyazaki

Koji Fujita

Hideyuki Hamamura

Osamu Tanaka

Takashi Morohoshi

Yousuke Kurosaki

Nobusato Morishige

Masahiro Yamamoto

Kenichi Murakami

Yuji Kubo

Tesshu Murakawa

Takeaki Wakisaka

Norikazu Fujii

Koichi Sugimoto

Toru Nagai

Yasuhide Morimoto

Ryutaro Yamagata

Tomohito Tanaka

Takashi Sekiya

Hotaka Honma

Tetsuya Sasaki

Tatsuya Takase

Haruhiko Atsumi

Hiroki Hori

Yuki Kunita

Akira Akagi

Yasuo Ohsugi

Nobuo Tachibana

Masahito Kamikawabata

Hideyuki Kobayashi

Masamitsu Kubota

Susumu Mukawa

Katsuyuki Yanagihara

Koji Kanehashi

Fumikazu Andou

Fumikazu Ando

Makoto Hirakawa

Kikuji Hirose

Nobuo Kamata

Ludger Lahn

Rei Honma

Carsten Schepers

Masataka Iwaki

Takeo Aramaki

Yoshiaki Iwase

Shin Furutaku

Tomohisa Yoshida

Makoto Niwa

Iwao Kishi

Yusuke Kanto

Yuuya Gohmoto

Yuya Fujii

Koji Muneda

Regis Lemaitre

Hirohiko Sato

Noriyoshi Kubota

O Uyama

Ryosuke Tomioka

Kohji Muneda

Toyoo Hayasaka

Seiichiro Chou

Régis LEMAîTRE

Eiichi Namba

Yuuji Kubo

Kenichi Murkami

This bonded and stacked core manufacturing method is for manufacturing a bonded and stacked core by performing press working on a strip-shaped steel sheet with a press working oil applied to one surface or both surfaces thereof, applying an adhesive to one surface of the strip-shaped steel sheet to obtain a plurality of steel sheet components, and stacking and bonding the steel sheet components, in which a curing accelerator having an average viscosity of 0.01 Pa·s to 100 Pa·s is applied to one surface or both surfaces of the strip-shaped steel sheet before the press working oil is applied.

Bonded and stacked core manufacturing method and bonded and stacked core manufacturing apparatus

This non-oriented electrical steel sheet has a predetermined chemical composition, and in which the tensile strength is 580 MPa or more, the average grain size of a recrystallization part of base iron is 50 μm or less, and in inclusions having an equivalent circle diameter of 1 μm or more and an S content of 5 mass % or more contained in base iron, the number of inclusions having a Mg content of more than 5 mass % and a Mn content of 5 mass % or more is 5 times or more the number of inclusions having a Mg content of 5 mass % or less and a Mn content of 5 mass % or more.

Non-oriented electrical steel sheet and manufacturing method therefor

There is provided a non-oriented electrical steel sheet that includes a base metal steel sheet and an insulating coating film that is formed on a surface of the base metal steel sheet, wherein the insulating coating film mainly contains metal phosphate, organic resin, and water-soluble organic compound, the metal phosphate contains at least aluminum as a metallic element, the organic resin has an SP value being within a range of 18.0 (MPa)or more to less than 24.0 (MPa), the water-soluble organic compound has an SP value being within a range of 19.0 (MPa)or more to less than 35.0 (MPa), and when measurement by X-ray diffractometry is performed on the insulating coating film, a degree of crystallinity of aluminum phosphate calculated from a peak from the metal phosphate is within a range of 0.5 to 5.0%.

Non-oriented electrical steel sheet

This grain-oriented electrical steel sheet includes a base steel sheet having a predetermined chemical composition, a glass coating formed on the base steel sheet, and a tension-applied insulation coating formed on the glass coating, on a front surface of the base steel sheet, a plurality of linear strains that extend continuously or intermittently in a direction intersecting with a rolling direction are present, intervals p in the rolling direction of the plurality of linear strains adjacent to each other are 3.0 to 9.0 mm, widths of the linear strains are 10 to 250 μm, and, in an X-ray topographic spectrum in a range of 1.50 mm in the rolling direction that is obtained from an X-ray topographic image of the front surface and includes the linear strain at a center, a full width at half maximum of a peak of the X-ray topographic spectrum including a maximum value of a spectral intensity is 0.02 mm or more and 0.10 mm or less.

Grain-oriented electrical steel sheet and method for manufacturing same

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 grain oriented electrical steel sheet includes a base steel sheet, an oxide layer, and a tension-insulation coating. When a glow discharge spectroscopy is conducted in a region from a surface of the tension-insulation coating to an inside of the base steel sheet, a sputtering time Feat which a Fe emission intensity becomes 0.5 times as compared with a saturation value thereof and a sputtering time Feat which a Fe emission intensity becomes 0.05 times as compared with the saturation value satisfy 0.01<(Fe−Fe)/Fe<0.35. Moreover, a magnetic flux density B8 in a rolling direction of the grain oriented electrical steel sheet is 1.90 T or more.

Grain oriented electrical steel sheet, forming method for insulation coating of grain oriented electrical steel sheet, and producing method for grain oriented electrical steel sheet

This coating composition for an electrical steel sheet contains an epoxy resin, a phenolic curing agent (A) and one or more amine-based curing agents (B) selected from the group consisting of an aromatic amine and dicyandiamide, the amount of the phenolic curing agent (A) is 1 to 40 parts by mass with respect to 100 parts by mass of the epoxy resin, and the amount of the amine-based curing agents (B) is 0.5 to 5 parts by mass with respect to 100 parts by mass of the epoxy resin.

Coating composition for electrical steel sheet, adhesive surface-coated electrical steel sheet and laminated core

An electrical steel sheet used for a laminated core is an electrical steel sheet including an insulation coatingon a surface of a base steel sheet, the insulation coating being coated with a coating composition for an electrical steel sheet. The coating composition for an electrical steel sheet includes: an epoxy resin; an epoxy resin curing agent; and an elastomer-modified phenolic resin, in which the amount of the elastomer-modified phenolic resin is 10 parts by mass to 100 parts by mass with respect to 100 parts by mass of the epoxy resin.

Coating composition for electrical steel sheet, electrical steel sheet, laminated core, and rotary electric machine

A non-oriented electrical steel sheet according to one embodiment of the present invention includes a base metal steel sheet, and a composite coating film composed of a Zn-containing phosphate and an organic resin, the composite coating film being formed on a surface of the base metal steel sheet, wherein: a content of Zn in the composite coating film is 10 mg/mor more per side; and the product of an amount of oxygen in the base metal steel sheet and a sheet thickness of the base metal steel sheet is 50 ppm·mm or less.

Non-oriented electrical steel sheet and method for producing same

Provided is an electric motor which includes an adhesively-laminated core for a stator having excellent productivity and high mechanical strength and that is thus capable of reducing vibration and noise of an electric motor and suppressing iron loss. The adhesively-laminated core for a stator includes electrical steel sheets laminated on each other and each coated on both sides with an insulation coating, and an adhesion part disposed between the electrical steel sheets adjacent to each other in a stacking direction and configured to cause the electrical steel sheets to be adhered to each other. All sets of the electrical steel sheets adjacent to each other in the stacking direction are adhered by the adhesion part, an adhesive forming the adhesion part includes a fast-curing type adhesive and a thermosetting adhesive, and the adhesion part is partially provided between the electrical steel sheets adjacent to each other in the stacking direction.

Adhesively-laminated core for stator, method of manufacturing the same, and electric motor

A laminated core including a plurality of electrical steel sheets stacked on each other, and adhesion parts which are provided between the electrical steel sheets adjacent to each other in an axial direction thereof and adhering the electrical steel sheets to each other, in which each of the electrical steel sheets includes an annular core back part, and a plurality of tooth parts which extend from the core back part in a radial direction of the core back part and are disposed at intervals in a circumferential direction of the core back part, and each of the tooth parts of the electrical steel sheets has an adhesion region provided with the adhesion part having a belt shape extending in the circumferential direction.

Laminated core and electric motor

A coating liquid for forming an insulation coating for grain-oriented electrical steel sheets, which contains boric acid and hydrated silicate particles containing aluminum, and a method for producing a grain-oriented electrical steel sheet comprising applying the coating liquid to a grain-oriented electrical steel sheet after final annealing, and then performing a baking treatment.

Coating liquid for forming insulation coating for grain-oriented electrical steel sheets, grain-oriented electrical steel sheet, and method for producing grain-oriented electrical steel sheet

A grain oriented electrical steel sheet includes a base steel sheet, an oxide layer, and a tension-insulation coating. When the iron oxide layer is analyzed by a fourier transform infrared spectroscopy, an absorbance Aat 650 cmand an absorbance Aat 1250 cmsatisfy 0.2≤A/A≤5.0. Moreover, a magnetic flux density B8 in a rolling direction of the grain oriented electrical steel sheet is 1.90 T or more.

A non-oriented electrical steel sheet according to one embodiment of this invention includes a base metal steel sheet and a composite coating film composed of a Zn-containing phosphate and an organic resin, the composite coating film being formed on a surface of the base metal steel sheet. A molar ratio of Zn to all metal components in the composite coating film is 10 mol % or more, and after the non-oriented electrical steel sheet is boiled for 20 minutes in boiled distilled water, an amount of soluble Zn in the distilled water is 1.0 mg/mor more. The method for determining the amount of soluble Zn is in accordance with JIS K 0102: 2016 'Testing Methods for Industrial Wastewater', 53.3 “ICP Emission Spectroscopy”.

The grain-oriented electrical steel sheet is a grain-oriented electrical steel sheet which does not have an inorganic coating containing forsterite as a main component, including a base steel sheet having a predetermined chemical component, a silicon-containing oxide layer provided on the base steel sheet, an iron-based oxide layer provided on the silicon-containing oxide layer, and a tension-insulation coating provided on the iron-based oxide layer, having a thickness of 1 to 3 μm, and containing phosphate and colloidal silica as main components. When elemental analysis is performed from a surface of the tension-insulation coating in a sheet thickness direction by glow discharge optical emission spectrometry, predetermined requirements are satisfied.

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Tokyo, Japan

Kazutoshi Takeda