586 patents
Page 17 of 30
Utility
Blank, and pressed article manufacturing method
9 Nov 20
A blank for forming a pressed article, the blank including a flat pattern edge configuring an edge on one length direction side of the blank, and an excess portion formed at the flat pattern edge.
Takashi Miyagi, Yasuharu Tanaka, Misao Ogawa, Toshimitsu Aso
Filed: 7 May 15
Utility
Apparatus for manufacturing forged crankshaft
9 Nov 20
An apparatus for manufacturing a forged crankshaft includes a pair of upper and lower dies and a first tool.
Tomohisa Yamashita, Sho Takamoto, Hiroyuki Kurokawa, Kunihiro Yabuno, Ken Yoshino, Kenji Tamura, Junichi Okubo
Filed: 12 May 16
Utility
Lap welding method of steel sheet and lap weld joint of steel sheet
9 Nov 20
A lap welding method of a steel sheet includes spot welding in a state in which the flange portion of a second steel sheet member having the flange portion and a standing wall portion is overlapped with the first steel sheet member, thereby forming a nugget between a first steel sheet member and a flange portion; and, after the spot welding, laser welding a region between an R stop of the standing wall portion and the nugget, thereby forming a weld bead, and, in the weld bead, a length dimension is equal to or longer than a diameter of the nugget, and a width dimension is 0.5 to 3.0 mm.
Seiji Furusako, Tohru Okada, Koichi Sato, Yasunobu Miyazaki
Filed: 15 Sep 16
Utility
Hot-dip galvanized steel sheet
2 Nov 20
A hot-dip galvanized steel sheet includes a base steel sheet and a hot-dip galvanized layer formed on at least one surface of the base steel sheet, in which the hot-dip galvanized layer includes Fe in a content of more than 0% to 5% or less, Al in a content of more than 0% to 1.0% or less, and columnar grains formed by a ζ phase on the surface of the steel sheet, further, 20% or more of the entire interface between the hot-dip galvanized layer and the base steel sheet is coated with the ζ phase, and a ratio of an interface formed between ζ grains in which coarse oxides are present among grains and the base steel sheet with respect to the entire interface between the ζ phase and the base steel sheet in the hot-dip galvanized layer is 50% or less, the base steel sheet has predetermined chemical components and a refined layer in direct contact with the interface between the base steel sheet and the hot-dip galvanized layer, an average thickness of the refined layer is 0.1 to 5.0 μm, an average grain size of ferrite in the refined layer is 0.1 to 3.0 μm, one or two or more of oxides of Si and Mn are contained in the refined layer, and a maximum size of the oxide is 0.01 to 0.4 μm, and a volume fraction of residual austenite in a range of ⅛ thickness to ⅜ thickness centered at a position of ¼ thickness from the surface of the base steel sheet is 1% or more.
Hiroyuki Kawata, Takeshi Yasui, Kohei Ueda, Naoki Maruyama, Yuji Yamaguchi, Satoshi Uchida, Ryosuke Komami, Hayato Arai, Toyomitsu Nakamura
Filed: 4 Nov 15
Utility
Steel sheet, hot-dip galvanized steel sheet, galvanized steel sheet, and manufacturing methods therefor
2 Nov 20
A steel sheet according to an aspect of the present invention has predetermined chemical composition, in which a structure at a thickness ¼ portion includes, in terms of volume ratios, tempered martensite: 30% to 70% and one or both of ferrite and bainite: a total of 20% to 70%, in the structure at the thickness ¼ portion, a volume ratio of residual austenite is less than 10%, a volume ratio of fresh martensite is 10% or less, a volume ratio of pearlite is 10% or less, and a total volume ratio of the residual austenite, the fresh martensite, and the pearlite is 15% or less, a number density of iron-based carbides having a major axis of 5 nm or more in the tempered martensite at the thickness ¼ portion is 5×107 particles/mm2 or more, a ratio of the number of ε-type carbides in the number of the iron-based carbides having the major axis of 5 nm or more at the thickness ¼ portion is 20% or more, and a tensile strength is 780 MPa or higher.
Yuri Toda, Masafumi Azuma, Akihiro Uenishi, Hiroyuki Kawata, Naoki Maruyama, Genichi Shigesato
Filed: 12 Jul 15
Utility
Hot-dip galvanized steel sheet
2 Nov 20
A hot-dip galvanized steel sheet includes a base steel sheet and a hot-dip galvanized layer formed on at least one surface of the base steel sheet, in which the hot-dip galvanized layer includes Fe in a content of more than 0% to 5% or less, Al in a content of more than 0% to 1.0% or less, and columnar grains formed by a ζ phase on the surface of the steel sheet, further, 20% or more of the entire interface between the hot-dip galvanized layer and the base steel sheet is coated with the ζ phase, and a ratio of an interface formed between ζ grains in which coarse oxides are present among ζ grains and the base steel sheet with respect to the entire interface between the ζ phase and the base steel sheet in the hot-dip galvanized layer is 50% or less, the base steel sheet has predetermined chemical components and a refined layer in direct contact with the interface between the base steel sheet and the hot-dip galvanized layer, an average thickness of the refined layer is 0.1 to 5.0 μm, an average grain size of ferrite in the refined layer is 0.1 to 3.0 μm, one or two or more of oxides of Si and Mn are contained in the refined layer, and a maximum size of the oxide is 0.01 to 0.4 μm.
Hiroyuki Kawata, Takeshi Yasui, Kohei Ueda, Naoki Maruyama, Yuji Yamaguchi, Satoshi Uchida, Ryosuke Komami, Hayato Arai, Toyomitsu Nakamura
Filed: 4 Nov 15
Utility
Stainless steel product
2 Nov 20
Provided is a stainless steel product having a chemical composition consisting of C: less than 0.05%, Si: 4.0 to 7.0%, Mn: 1.50% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 20.0%, Ni: 11.0 to 17.0%, Cu: 0.15 to 1.5%, Mo: 0.15 to 1.5%, Nb: 0.5 to 1.2%, Sol.
Hideya Kaminaka, Shinya Yamamoto, Hiroshi Kamio, Kouichi Takeuchi
Filed: 29 Sep 15
Utility
Steel sheet for heat treatment
2 Nov 20
A steel sheet for heat treatment having a chemical composition including, by mass %: C: 0.05 to 0.50%; Si: 0.50 to 5.0%; Mn; 1.5 to 4.0%; P: 0.05% or less; S: 0.05% or less; N: 0.01% or less; Ti: 0.01 to 0.10%; B: 0.0005 to 0.010%; Cr: 0 to 1.0%; Ni: 0 to 2.0%; Cu: 0 to 1.0%; Mo: 0 to 1.0%; V: 0 to 1.0%; Ca: 0 to 0.01%; Al: 0 to 1.0%; Nb: 0 to 1.0%; REM: 0 to 0.1%; and the balance: Fe and impurities, wherein a maximum height roughness Rz on a surface of the steel sheet is 3.0 to 10.0 μm, and a number density of carbide being present in the steel sheet and having circle-equivalent diameters of 0.1 μm or larger is 8.0×103/mm2 or lower.
Yoshihiro Suwa, Shinichiro Tabata, Masafumi Azuma, Kazuo Hikida
Filed: 6 Apr 16
Utility
Galvannealed steel sheet and production method thereof
26 Oct 20
Masaharu Oka, Nobusato Kojima, Tetsuya Okada
Filed: 21 Aug 16
Utility
Crystal orientation figure creating device, charged particle beam device, crystal orientation figure creating method, and program
19 Oct 20
There is provided a crystal orientation figure creating device for use in a charged particle beam device for making a charged particle beam irradiated to a surface of a sample, the crystal orientation figure creating device being configured to create a crystal orientation figure, which is a figure representing a crystal coordinate system of a crystal at a position selected on the surface with respect to an incident direction of the charged particle beam, the crystal orientation figure creating device including: an orientation information acquiring unit configured to acquire crystal orientation information with respect to the incident direction at the selected position; an incident direction information acquiring unit configured to acquire information relating to an incident direction of the charged particle beam with respect to the sample; and a crystal orientation figure creating unit configured to create a crystal orientation figure in a changed incident direction at the selected position, based on the crystal orientation information acquired by the orientation information acquiring unit, and the information relating to the incident direction at the time when the crystal orientation information is acquired and the information relating to the changed incident direction, acquired by the incident direction information acquiring unit.
Takafumi Amino, Takashige Mori, Naoki Maruyama
Filed: 24 Oct 18
Utility
Steel sheet, hot-dip galvanized steel sheet, galvannealed steel sheet, and manufacturing methods therefor
19 Oct 20
A steel sheet according to an aspect of the present invention has predetermined chemical composition, in which a structure at a thickness ¼ portion includes, in terms of volume ratios, tempered martensite: 70% or more and one or both of ferrite and bainite: a total of less than 20%, in the structure at the thickness ¼ portion, a volume ratio of residual austenite is less than 10%, a volume ratio of fresh martensite is 10% or less, a volume ratio of pearlite is 10% or less, and a total volume ratio of the residual austenite, the fresh martensite, and the pearlite is 15% or less, a number density of iron-based carbides having a major axis of 5 nm or more in the tempered martensite at the thickness ¼ portion is 5×107 particles/mm2 or more, a ratio of the number of ε-type carbides in the number of the iron-based carbides having the major axis of 5 nm or more at the thickness ¼ portion is 20% or more, and a tensile strength is 780 MPa or higher.
Yuri Toda, Masafumi Azuma, Akihiro Uenishi, Hiroyuki Kawata, Naoki Maruyama, Genichi Shigesato
Filed: 12 Jul 15
Utility
Tilting parameters calculating device, sample stage, charged particle beam device, and program
19 Oct 20
There is provided a tilting parameters calculating device for use in a charged particle beam device for making a charged particle beam irradiated to a surface of a sample mounted on a sample stage, the tilting parameters calculating device being configured to calculate tilting parameters, the tilting parameters being input parameters to control a tilting direction and a tilting value of the sample and/or the charged particle beam, the input parameters being necessary to change an incident direction of the charged particle beam with respect to the sample, the tilting parameters calculating device including a tilting parameters calculating unit for calculating the tilting parameters based on information that indicates the incident direction of the charged particle beam with respect to a crystal lying at a selected position on the surface in a state where the incident direction of the charged particle beam with respect to the sample is in a predetermined incident direction, the information being designated on a crystal orientation figure, which is a diagram illustrating the incident direction of the charged particle beam with respect to a crystal coordinate system of the crystal.
Takashige Mori, Takafumi Amino, Naoki Maruyama, Akira Taniyama, Shunsuke Taniguchi, Chie Yokoyama
Filed: 30 May 18
Utility
Steel for induction hardening
19 Oct 20
Yutaka Neishi, Akira Shiga, Kei Miyanishi
Filed: 18 Jul 17
Utility
High-strength PC steel wire
19 Oct 20
This invention provides a high-strength PC steel wire having a chemical composition containing, in mass %, C: 0.90 to 1.10%, Si: 0.80 to 1.50%, Mn: 0.30 to 0.70%, P: 0.030% or less, S: 0.030% or less, Al: 0.010 to 0.070%, N: 0.0010 to 0.010%, Cr: 0 to 0.50%, V: 0 to 0.10%, B: 0 to 0.005%, Ni: 0 to 1.0%, Cu: 0 to 0.50%, and the balance: Fe and impurities.
Makoto Okonogi, Daisuke Hirakami, Masato Yamada, Katsuhito Oshima, Shuichi Tanaka
Filed: 19 Jul 16
Utility
Nitrided plate part and method for producing the same
19 Oct 20
Eisaku Sakurada, Shinya Saitoh, Yoshinori Hyodo, Kazuya Miura, Michiko Wakatuki
Filed: 1 Dec 16
Utility
Production method for producing a press-formed product
19 Oct 20
Kenichiro Otsuka, Yoshiaki Nakazawa, Ryuichi Nishimura, Masahiro Saito
Filed: 24 Jan 16
Utility
Tailored blank for hot stamping, hot stamped member, and methods for manufacturing same
19 Oct 20
A tailored blank for hot stamping includes a welded portion formed by butt-welding a first aluminum-plated steel sheet and a second aluminum-plated steel sheet, an Average Al concentration of a weld metal in the welded portion is in a range of 0.3 mass % to 1.5 mass %, an Ac3 point of the weld metal is 1250° C. or lower, and furthermore, an aluminum layer formed during the butt-welding is present on a surface of the welded portion.
Yasunobu Miyazaki, Yasuaki Naito, Kaoru Kawasaki, Takahiro Yoshinaga
Filed: 4 Jan 18
Utility
Method for producing forged crankshaft
12 Oct 20
A production method includes a preforming process, a forming process and a finish forging process.
Junichi Okubo, Kenji Tamura, Kunihiro Yoshida, Samsoo Hwang, Ryusuke Nakano, Masao Hori
Filed: 23 Aug 17
Utility
Edging method and edging device
12 Oct 20
An edging method including changing an incident angle of a slab with respect to a pair of edging members that are disposed on a conveyance line of the slab and that edge the slab based on information relating to the slab acquired at at least one of prior to edging or after edging.
Yoji Nakamura, Toshiaki Saitoh, Satoru Mashiko, Tetsuo Kishimoto, Akihisa Tsuruta, Tatsuya Nakada, Naoki Kataoka
Filed: 12 May 16
Utility
Magnesia carbon brick and production method therefor
12 Oct 20
Provided are a magnesia carbon brick which does not include graphite yet has excellent spalling and corrosion resistances, and a method for producing thereof.
Yuya Tomita, Masato Tanaka, Shigeto Sawai
Filed: 15 Oct 17