1279 patents
Page 4 of 64
Utility
Grain-oriented electrical steel sheet
5 Jul 22
A grain-oriented electrical steel sheet includes a steel layer and an insulation coating arranged in directly contact with the steel layer thereon.
Hiroyoshi Yashiki, Kenichi Murakami, Nobusato Morishige, Hirotoshi Tada, Yoshiaki Natori
Filed: 18 Feb 20
Utility
Steel sheet and manufacturing method therefor
5 Jul 22
A steel sheet has a chemical composition with a steel structure containing, by volume fraction, soft ferrite: 0-30%, retained austenite: 3-40%, fresh martensite: 0-30%, pearlite and cementite: 0-10%, and a remainder including hard ferrite.
Takafumi Yokoyama, Kohichi Sano, Riki Okamoto, Hiroyuki Kawata, Eisaku Sakurada, Yuji Yamaguchi, Kazuki Shiokawa, Yuichi Nakahira, Kohei Ueda, Masahiro Nakata, Satoshi Uchida
Filed: 30 Mar 18
Utility
Organic resin-coated plated steel sheet
5 Jul 22
The present invention provides a noble and improved organic resin-coated plated steel sheet which is improved in degreasing properties while securing the characteristics required for the organic resin-coated plated steel sheet.
Fumio Shibao, Masayoshi Nagatomi
Filed: 9 Mar 18
Utility
Manufacturing Method and Manufacturing Device for Link Part
30 Jun 22
This manufacturing method for a link part is a method of manufacturing a link part having one end portion having a connecting hole and provided on one side in one direction from an intermediate part which is long in the one direction and has a first side wall and a second side wall each having a pilot hole at least at one end portion and disposed to face each other and a connecting wall connecting one side edge of the first side wall and one side edge of the second side wall, and the other end portion provided on the other side therefrom in the one direction.
Masahiko SATO, Masaaki MIZUMURA
Filed: 25 Mar 20
Utility
Core Block, Laminated Core, and Electric Motor
30 Jun 22
What is disclosed is a core block, a plurality thereof constituting a laminated core by being connected in an annular shape, the core block including: a plurality of electrical steel sheet pieces stacked to each other; and an adhesion part which is provided between the electrical steel sheet pieces adjacent in a stacking direction and adheres the electrical steel sheet pieces to each other, in which an adhesion area ratio of the electrical steel sheet piece by the adhesion part is 1% or more and 60% or less.
Ryu HIRAYAMA, Kazutoshi TAKEDA
Filed: 22 Jun 20
Utility
Resin Film-laminated Metal Sheet and Method for Manufacturing Same
30 Jun 22
A resin film-laminated metal sheet includes a metal sheet and thermoplastic resin films that are fused to both surfaces of the metal sheet, the metal sheet is a steel sheet having a thickness of 0.08 mm or more or an aluminum sheet having a thickness of 0.15 mm or more, and, when a surface of the thermoplastic resin film opposite to a surface that is fused to the metal sheet is defined as a first surface, the surface tension on the first surface in at least one of the thermoplastic resin films is 50 mN/m or less, the surface tension on the surface that is fused to the metal sheet is 36 mN/m or more, and the amount of a wax attached to the first surface is more than 0 mg/m2 and 5.00 mg/m2 or less.
Nobuo KADOWAKI, Kazushi IWAKIRI, Tomohiro MIZUTANI, Daisuke YASUFUKU, Tomoya HARA, Satoshi KATO, Yuta TAJIMA, Yuki NAGAI
Filed: 23 Jun 20
Utility
Blank and Component
23 Jun 22
Provided is a blank made of a steel and comprising at least two protruding regions (313) having an outer edge (311) protruding outward in in-plane directions, in which a softened part (320) is formed at least partially in the protruding regions (313) and the softened part (320) is formed in at least a part of the outer edge of the protruding regions (313), a Vickers hardness of the softened part (320) is lower than a Vickers hardness of a main portion region (310), and the blank comprises at least two of the protruding regions (313) having the softened part (320).
Soma SONOBE, Yasuhiro ITO
Filed: 9 Apr 20
Utility
Blank and Structural Member
23 Jun 22
A blank (100) includes a main portion (110) that is made of steel having a tensile strength of 1450 MPa or more and a softened portion (120), the ratio of Vickers hardness of the softened portion (120) to the Vickers hardness of the main portion (110) is 0.7 or more and 0.95 or less, and the softened portion (120) is disposed at a position different from a position of the main portion (110) in an in-plane direction.
Yasuhiro ITO, Takashi YASUTOMI, Soma SONOBE
Filed: 10 Apr 20
Utility
Method for Producing Chromium-containing Molten Iron
23 Jun 22
A charged material containing alloy iron of at least one of ferrochrome containing metallic Si or ferrosilicon, and unreduced slag containing Cr oxide generated by oxidative refining, is charged into an electric furnace as a mixture in which a mass ratio of a metallic Si amount to a Cr oxide amount is from 0.30 to 0.40, and a C concentration is in a range of from 2.0% by mass to a saturation concentration, and molten iron containing Cr obtained due to the Cr oxide undergoing reduction processing is produced, such that, when the charged material is heated and melted in the electric furnace, an attainment temperature is set to from 1400° C. to 1700° C., a maximum average heating rate in any 80° C. interval from 1300° C. to the attainment temperature is set to 15.0° C./min or less, and a minimum average heating rate in any 80° C. interval from 1300° C. to the attainment temperature is set to 3.0° C./min or greater.
Norifumi ASAHARA, Katsuhiko KATO, Mikio FUTAKA, Yasuhiro TANAKA, Naoki KANEKO, Junichi NAKAGAWA
Filed: 31 Mar 20
Utility
High Strength Steel Sheet
23 Jun 22
A high strength steel sheet according to the present invention contains a predetermined chemical composition, in a metallographic structure, the total area ratio of tempered martensite and bainite is 80% or more, at a sheet thickness ¼ position of a cross section parallel to a rolling direction and perpendicular to a rolled surface, the standard deviation of number densities of precipitates having a diameter of 10 nm or less and including one or both of Ti and Nb is less than 5×1010 numbers/mm3, and the tensile strength is 780 MPa or more.
Genki ABUKAWA, Hiroshi SHUTO
Filed: 8 Jul 20
Utility
Method for Producing Chromium-containing Molten Iron
23 Jun 22
Norifumi ASAHARA, Katsuhiko KATO, Mikio FUTAKA, Yasuhiro TANAKA, Naoki KANEKO, Junichi NAKAGAWA
Filed: 31 Mar 20
Utility
Steel Sheet
23 Jun 22
Katsuya NAKANO, Kengo TAKEDA, Hiroyuki KAWATA, Akihiro UENISHI
Filed: 26 Jun 20
Utility
Hot-stamping Formed Body
23 Jun 22
A hot-stamping formed body includes: a steel sheet having a predetermined chemical composition; and a plating layer provided on a surface of the steel sheet, the plating layer having an adhesion amount of 10 g/m2 to 90 g/m2 and a Ni content of 10 mass % to 25 mass %, and containing a remainder consisting of Zn and impurities.
Daisuke MAEDA, Yuri TODA, Tomohito TANAKA, Kazuo HIKIDA
Filed: 13 May 20
Utility
Hot-stamping Formed Body
23 Jun 22
A hot-stamping formed body includes: a steel sheet having a predetermined chemical composition; and a plating layer provided on a surface of the steel sheet, the plating layer having an adhesion amount of 10 g/m2 to 90 g/m2 and a Ni content of 10 mass % to 25 mass %, and containing a remainder consisting of Zn and impurities.
Daisuke MAEDA, Yuri TODA, Kazuo HIKIDA
Filed: 13 May 20
Utility
Martensitic Stainless Steel Pipe and Method of Manufacturing the Same
23 Jun 22
A method of manufacturing a martensitic stainless steel pipe includes: preparing a hollow shell, S1; a pickling step, S3-2, in which the hollow shell is immersed in nitrohydrofluoric acid solution at a temperature below 50° C.; after pickling step S3-2, a high-pressure water washing step, S4, in which high-pressure water is injected onto the outer surface of the hollow shell to clean the outer surface of the hollow shell; after high-pressure water washing step S4, a hot-water immersion step, S5, in which the hollow shell is immersed in hot water if necessary; and spraying gas onto the surface of the hollow shell, S6, before a lapse of 15 minutes from completion of high-pressure water washing step S4 or hot-water immersion step S5.
Mikiko NOGUCHI, Takashi YAMAGUCHI
Filed: 17 Jul 20
Utility
Wound Core and Method for Producing Same
23 Jun 22
Provided is a wound core formed by laminating a plurality of bent bodies obtained by forming a coated grain-oriented electrical steel sheet in which a coating is formed on at least one surface of a grain-oriented electrical steel sheet so that the coating is on an outside, in a sheet thickness direction, in which the bent body has a bent region obtained by bending the coated grain-oriented electrical steel sheet and a flat region adjacent to the bent region, the number of deformation twins present in the bent region in a side view is five or less per 1 mm of a length of a center line in the sheet thickness direction in the bent region, and when a region extending 40 times a sheet thickness to both sides in a circumferential direction from a center of the bent region on an outer circumferential surface of the bent body is defined as a strain affected region, a proportion of an area where the coating is not damaged at any position along the circumferential direction in a flat region within the strain affected region is 90% or more.
Takahito MIZUMURA, Masato MIZOKAMI, Hisashi MOGI, Fumiaki TAKAHASHI
Filed: 27 Apr 20
Utility
Overlapped blank for hot stamping, method of manufacturing overlapped hot stamp molded body, and overlapped hot stamp molded body
21 Jun 22
To solve the problem about the difference in temperature increasing rate between an overlapped part and a one-sheet part so as to further improve the corrosion resistance of plating after hot stamping.
Soshi Fujita, Yuki Suzuki, Masahiro Fuda, Jun Maki, Hideaki Irikawa, Masahiro Nakata
Filed: 5 Apr 19
Utility
Method for producing H-shaped steel
21 Jun 22
A method for producing H-shaped steel, the method includes: a rough rolling step; an intermediate rolling step; and a finish rolling step, wherein: the rough rolling step includes: an edging rolling step of rolling and shaping a material to be rolled into a predetermined almost dog-bone shape; and a flat rolling step of performing rolling of a web part with the material to be rolled after completion of the edging rolling step rotated 90° or 270°; upper and lower caliber rolls of at least one caliber of calibers configured to perform the flat rolling step include recessed parts configured to form a raised part at a middle of a web part of the material to be rolled, the recessed parts being provided at roll barrel length middle parts of the upper and lower caliber rolls; and a side surface inclination angle α of the formed raised part is set to 30° or more.
Hiroshi Yamashita
Filed: 19 Dec 16
Utility
Electroplating apparatus
21 Jun 22
An electroplating apparatus is provided that minimizes unplated regions when an alloy plating layer is provided on the surface of a thread on a steel pipe.
Masanari Kimoto, Kazuya Ishii, Masahiro Oshima
Filed: 18 Jun 20
Utility
Steel sheet
21 Jun 22
A steel sheet includes a predetermined chemical composition, and includes a steel microstructure represented by, in an area ratio, ferrite: 5% to 80%, a hard microstructure constituted of bainite, martensite or retained austenite or an arbitrary combination of the above: 20% to 95%, and a standard deviation of a line fraction of the hard microstructure on a line in a plane perpendicular to a thickness direction: 0.050 or less in a depth range where a depth from a surface when a thickness of a steel sheet is set as t is from 3t/8 to t/2.
Shohei Yabu, Akihiro Uenishi, Koutarou Hayashi
Filed: 8 Aug 17