1279 patents
Page 10 of 64
Utility
Automobile Hood
31 Mar 22
In an automobile hood, sufficient panel rigidity and dent resistance of a panel are secured while achieving weight reduction.
Tohru YOSHIDA, Koichi HAMADA, Takeshi KAWACHI, Atsuo KOGA, Takuya OISHI
Filed: 27 Dec 19
Utility
Method for Producing Grain Oriented Electrical Steel Sheet
31 Mar 22
A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O/PH2 is controlled, an annealing separator applying process where a mass ratio of MgO and Al2O3 in an annealing separator is controlled, a final annealing process where hydrogen in mixed gas atmosphere is controlled to 50 volume % or more, an annealing separator removing process where water-washing is conducted using solution with inhibitor, a smoothing process where chemical-polished is conducted to control average roughness Ra, and an insulation coating forming process where insulation coating forming solution in which crystalline phosphide is included is applied.
Shinsuke TAKATANI, Yoshiyuki USHIGAMI
Filed: 16 Jan 20
Utility
Grain-oriented Electrical Steel Sheet and Method for Manufacturing Same
31 Mar 22
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.
Kazutoshi TAKEDA, Ichiro TANAKA, Tomoya SUENAGA, Takashi KATAOKA, Yuki KUNITA
Filed: 16 Jan 20
Utility
Method for Manufacturing Grain-oriented Electrical Steel Sheet
31 Mar 22
A method for manufacturing a grain-oriented electrical steel sheet includes: a silicon steel material production process of producing a silicon steel material; a hot rolling process of obtaining a hot rolled sheet by subjecting the silicon steel material to hot rolling; a cold rolling process of obtaining a steel sheet of a final sheet thickness by subjecting the hot rolled sheet to a single cold rolling process or multiple cold rolling processes having intermediate annealing performed between the cold rolling processes; a decarburization annealing process of subjecting the steel sheet to decarburization annealing; and a final annealing process of applying an annealing separator containing alumina as a main component to the steel sheet and subjecting the steel sheet to final annealing.
Yoshiyuki USHIGAMI, Shuichi NAKAMURA, Hiroyasu FUJII, Norikazu FUJII
Filed: 16 Jan 20
Utility
Grain-oriented Electrical Steel Sheet and Method for Manufacturing Same and Annealing Separator
31 Mar 22
Grain-oriented electrical steel sheet excellent in magnetic properties and excellent in adhesion of a primary coating to the steel sheet is provided.
Ichiro TANAKA, Ryutaro YAMAGATA, Nobusato MORISHIGE, Takashi KATAOKA, Masaru TAKAHASHI
Filed: 8 Jan 20
Utility
Method for Producing Grain Oriented Electrical Steel Sheet
31 Mar 22
A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O/PH2 is controlled, an annealing separator applying process where a mass ratio of MgO and MCl in an annealing separator is controlled, a final annealing process where an oxidation degree is controlled when atmosphere includes hydrogen or a dew point is controlled when atmosphere consists of inert gas, and an insulation coating forming process where a mass ratio of phosphoric acid and metal compound in insulation coating forming solution is controlled.
Shinsuke TAKATANI, Yoshiyuki USHIGAMI
Filed: 16 Jan 20
Utility
Steel Material Suitable for Use In Sour Environment
31 Mar 22
A steel material according to the present disclosure has a chemical composition consisting of, in mass %: C: 0.20 to 0.45%, Si: 0.05 to 1.00%, Mn: 0.01 to 1.00%, P: 0.030% or less, S: 0.0050% or less, Al: 0.005 to 0.100%, Cr: 0.60 to 1.50%, Mo: more than 1.00 to 2.00%, Ti: 0.002 to 0.020%, V: 0.05 to 0.30%, Nb: 0.005 to 0.100%, B: 0.0005 to 0.0040%, N: 0.0100% or less, O: less than 0.0020%, and the balance being Fe and impurities, and satisfying Formula (1) described in the specification.
Hiroki KAMITANI, Yohei OTOME, Atsushi SOMA, Taro OE, Nobuaki KOMATSUBARA, Shinji YOSHIDA, Yuji ARAI
Filed: 13 Feb 20
Utility
Method for Producing Grain Oriented Electrical Steel Sheet
31 Mar 22
A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O/PH2 is controlled, an annealing separator applying process where a mass ratio of MgO and Al2O3 in an annealing separator is controlled, a final annealing process where hydrogen in mixed gas atmosphere is controlled to 50 volume % or more, an annealing separator removing process where water-washing is conducted using solution with inhibitor and then pickling is conducted, a smoothing process where mixed gas and temperature are controlled for annealing, and an insulation coating forming process where a baking temperature and a heat treatment temperature are controlled.
Shinsuke TAKATANI, Yoshiyuki USHIGAMI
Filed: 16 Jan 20
Utility
Method for Manufacturing Grain-oriented Electrical Steel Sheet
31 Mar 22
A method for manufacturing a grain-oriented electrical steel sheet includes: heating a steel slab having a prescribed chemical composition to lower than 1250° C. and subjecting the steel slab to hot rolling to obtain a hot-rolled steel sheet; performing hot-band annealing on the hot-rolled steel sheet; pickling the hot-rolled steel sheet which has been subjected to the hot-band annealing; subjecting the hot-rolled steel sheet which has been subjected to the pickling to cold rolling to obtain a cold-rolled steel sheet having a final sheet thickness d of 0.15 to 0.23 mm; performing a decarburization nitriding treatment including decarburization annealing and nitriding on the cold-rolled steel sheet; performing final annealing on the cold-rolled steel sheet which has been subjected to the decarburization nitriding treatment; and then applying a coating liquid for insulation coating formation to the cold-rolled steel sheet which has been subjected to the final annealing and baking the cold-rolled steel sheet.
Masato YASUDA, Masaru TAKAHASHI, Yoshiyuki USHIGAMI, Shohji NAGANO, Yoichi ZAIZEN
Filed: 16 Jan 20
Utility
Press Forming Method and Press Apparatus
31 Mar 22
A press forming method includes a first step of pinching one part of a metal sheet by means of a die and a pad, and a second step of moving a punch in a direction in which the punch approaches the die relatively to perform press forming on the metal sheet.
Minoru SUGAWARA, Yasuharu TANAKA, Takashi MIYAGI, Misao OGAWA, Junki NATORI
Filed: 24 Jan 20
Utility
Method for Monitoring Welding of Electric Resistance Welded Steel Pipe, Method for Manufacturing Electric Resistance Welded Steel Pipe, Device for Monitoring Welding of Electric Resistance Welded Steel Pipe, and Device for Manufacturing Electric Resistance Welded Steel Pipe
31 Mar 22
A method for monitoring welding of an electric resistance welded steel pipe of the present invention includes: an image acquisition step in which, when an electric resistance welded steel pipe is welded, a V-convergence portion including an edge detection area and a V-convergence point, and a welding portion including a position where a molten steel starts to be discharged from an inside of a wall thickness and a bead, are imaged to obtain a captured image; a determination information acquisition step in which the captured image is image-processed, and a molten length from the V-convergence point to the position where the molten steel starts to be discharged or a molten width of the welding portion or a combination thereof is acquired as a determination information; and a determining step in which it is determined whether a cold welding has occurred by comparing the determination information with a determination threshold value set in advance for each wall thickness of the electric resistance welded steel pipe.
Noboru HASEGAWA, Takashi MIYAKAWA, Michimasa MUKAI, Toshisuke FUKAMI
Filed: 6 Mar 20
Utility
Automobile Hood
31 Mar 22
In an automobile hood, sufficient panel rigidity and dent resistance are secured while achieving weight reduction.
Tohru YOSHIDA, Koichi HAMADA, Takeshi KAWACHI, Atsuo KOGA, Takuya OISHI
Filed: 27 Dec 19
Utility
Tubular Rotary Component, Manufacturing Method Therefor, and Mold Therefor
31 Mar 22
Provided is a method for manufacturing a tubular rotary component from a donut-shaped metal disc, wherein the generation of wrinkles or cracks due to a drawing process can be suppressed.
Atsushi SUGAMA, Takatsugu KITORA
Filed: 18 Jul 19
Utility
Automobile Door
31 Mar 22
Provided is an automobile door (600) including: a first impact absorbing member (122) that traverses the automobile door (600) so as to extend between both end portion regions in a vehicle height direction; a second impact absorbing member (124) that traverses the automobile door (600) so as to extend between both end portion regions in a vehicle length direction; an exterior material (110); and a belt line reinforcement (300), in which bending rigidity in a vehicle width direction of a cross section perpendicular to an extending direction of the belt line reinforcement (300) at a support portion is larger than bending rigidity in the vehicle width direction of a cross section perpendicular to an extending direction of the first impact absorbing member (122) at an intersection portion.
Toshiya SUZUKI, Satoshi HIROSE, Tohru YOSHIDA, Yoshiaki NAKAZAWA
Filed: 15 Jan 20
Utility
Grain-oriented Electrical Steel Sheet, and Steel Sheet Serving As Base Sheet for Grain-oriented Electrical Steel Sheet
31 Mar 22
A grain-oriented electrical steel sheet according to an aspect of the present invention includes an underlying steel sheet and a tension-insulation coating arranged on the surface of the underlying steel sheet, and a ten-point average roughness RzL in an L direction obtained when the tension-insulation coating is removed from the grain-oriented electrical steel sheet with an alkaline solution, and then the surface of the underlying steel sheet is measured in a rolling direction is 6.0 μm or less.
Shuichi NAKAMURA, Yoshiyuki USHIGAMI, Hiroyasu FUJII
Filed: 16 Jan 20
Utility
Hot-stamped body
29 Mar 22
There is provided a hot-stamped body including: a steel base metal; and a metallic layer formed on a surface of the steel base metal, wherein the metallic layer includes: an interface layer that contains, in mass %, Al: 30.0 to 36.0%, has a thickness of 100 nm to 15 μm, and is located in an interface between the metallic layer and the steel base metal; and a principal layer that includes coexisting Zn phases and insular FeAl2 phases, is located on the interface layer, and has a thickness of 1 μm to 40 μm.
Takuya Mitsunobu, Kohei Tokuda, Akihiro Sengoku, Kenichiro Matsumura
Filed: 20 Mar 18
Utility
Cr-Ni alloy and seamless steel pipe made of Cr-Ni alloy
29 Mar 22
Akiko Tomio, Masaki Ueyama, Yusaku Tomio
Filed: 17 Jan 19
Utility
Automobile Side Structure and Automobile
24 Mar 22
What is provided is an automobile side structure including: a first impact absorbing member (122) extending in a vehicle height direction inside an automobile door; a second impact absorbing member (126) inside the automobile door; a door inner panel (200) inside the automobile door; and a side sill (520), in which the first impact absorbing member (122), the second impact absorbing member (126), the door inner panel (200), and the side sill (520) are on a straight line in a vehicle width direction, and the second impact absorbing member (126) is disposed between the first impact absorbing member (122) and the door inner panel (200); and an automobile.
Toshiya SUZUKI, Yoshiaki NAKAZAWA
Filed: 15 Jan 20
Utility
Grain-oriented Electrical Steel Sheet, Intermediate Steel Sheet for Grain-oriented Electrical Steel Sheet, and Methods for Manufacturing Same
24 Mar 22
This grain-oriented electrical steel sheet includes a base steel sheet, an intermediate layer that is formed on a surface of the base steel sheet and mainly contains silicon oxide, and an insulation coating that is formed on the surface of the intermediate layer.
Shinji YAMAMOTO, Yoshiyuki USHIGAMI, Shinsuke TAKATANI
Filed: 16 Jan 20
Utility
Method for Producing Grain-oriented Electrical Steel Sheet
24 Mar 22
A method for producing a grain-oriented electrical steel sheet which has an intermediate layer containing silicon oxide as a main component on a surface of a base steel sheet in which a forsterite film is substantially absent and has an insulation coating on a surface of the intermediate layer includes: a decarburization annealing process of obtaining a decarburization-annealed steel sheet which has the oxygen content or 320 ppm or less and the carbon content of 25 ppm or less by subjecting a cold rolled steel sheet containing Si to decarburization annealing; a final annealing process of heating the decarburization-annealed steel sheet in a state in which a surface of the decarburization-annealed steel sheet is coated with an annealing separator to subject a steel sheet to secondary recrystallization; a removal process of obtaining a finally-annealed steel sheet by removing the annealing separator on the steel sheet which has been subjected to the final annealing process; an intermediate layer forming process of forming the intermediate layer by subjecting the finally-annealed steel sheet to thermal oxidation annealing; and an insulation coating forming process of forming the insulation coating on the finally-annealed steel sheet having the intermediate layer formed thereon.
Takeshi IMAI, Shunsuke OKUMURA
Filed: 16 Jan 20