1279 patents
Page 5 of 64
Utility
Non-oriented Electrical Steel Sheet
16 Jun 22
Tesshu MURAKAWA, Hiroshi FUJIMURA, Takeaki WAKISAKA, Takeshi KUBOTA
Filed: 14 Feb 20
Utility
Electrical Steel Sheet and Method for Manufacturing Same
16 Jun 22
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×(B50 (0°)+B50 (45°))/2≥B50 (22.5°)].
Miho TOMITA, Yoshiaki NATORI, Hiroyoshi YASHIKI, Hiroshi FUJIMURA
Filed: 1 Apr 20
Utility
Seamless Steel Pipe Suitable for Use In Sour Environment
16 Jun 22
The seamless steel pipe according to the present disclosure includes a base material and a decarburized layer formed on the surface of the base material.
Seiya OKADA, Hiroki KAMITANI, Nobuaki KOMATSUBARA, Yusaku TOMIO, Shohei IKEDA, Naoya SHIRASAWA
Filed: 16 Mar 20
Utility
High-strength Steel Sheet and Method for Manufacturing Same
16 Jun 22
A high-strength steel sheet includes a predetermined chemical composition, a microstructure contains, by volume percentage, 95% or more of tempered martensite and bainite in total, and a remainder consists of ferrite and pearlite, the microstructure contains 5.0×109 pieces/mm or more of, per unit volume, precipitate having an equivalent circle diameter of 5.0 nm or less and containing Ti, Hvs/Hvc which is a ratio of an average hardness Hvs at a position of a depth of 20 μm from a surface to an average hardness Hvc at a position of 0.20 to 0.50 mm from the surface is 0.85 or more, a tensile strength is 980 MPa or more, and a product of the tensile strength and elongation is 12,000 MPa×% or more.
Masafumi AZUMA, Eisaku SAKURADA, Genki ABUKAWA, Kenichiro OTSUKA, Takeshi TOYODA
Filed: 19 Mar 20
Utility
Electric Resistance-welded Steel Tube for Hollow Stabilizer, Hollow Stabilizer, and Manufacturing Methods of Same
16 Jun 22
This electric resistance-welded steel tube for a hollow stabilizer is an electric resistance-welded steel tube for a hollow stabilizer including a base material portion and a weld, in which the base material portion has predetermined chemical components, a wall thickness of the base material portion is 2.0 to 6.0 mm, an outer diameter of the electric resistance-welded steel tube is 10 to 40 mm, in a C direction cross section of the electric resistance-welded steel tube, a recessed bead cut is present in a region including the weld on an inner surface side of the electric resistance-welded steel tube, when an imaginary line is drawn from one opening edge to the other opening edge of the bead cut in a shortest distance, a maximum depth from the imaginary line to a bottom of the bead cut is 300 μm or less, a maximum inclusion diameter that is included in the base material portion is 300 μm or less, in the base material portion of the electric resistance-welded steel tube, a surface roughness of the inner surface side is 300 μm or less in terms of a maximum profile valley depth Rv, and maximum hardness of the electric resistance-welded steel tube including the weld is 300 Hv or less.
Yukinobu NAGATA, Yuki MOTEGI, Yuji ARAOKA, Ken OU
Filed: 27 Mar 20
Utility
Steel Sheet and Method for Manufacturing Same
16 Jun 22
This steel sheet has a predetermined chemical composition, in which the area ratio of plate martensite is 10% or more, the average grain size of prior austenite grains is 2.0 μm to 10.0 μm, the maximum diameter thereof is 20.0 μm or less, the amount of solid solution C in martensite is 0.20 mass % or less, the average carbide size is 0.25 μm or less, the crystal orientation difference between plate martensite and another martensite adjacent thereto in the same prior austenite grain is 10.0° or less, and the P concentration at grain boundaries of the prior austenite grains is 4.0 at % or less.
Kohichi SANO, Hiroyuki KAWATA, Kengo TAKEDA
Filed: 8 Apr 20
Utility
Zinc-plated Steel Sheet for Hot Stamping, Method of Manufacturing Zinc-plated Steel Sheet for Hot Stamping, and Hot-stamping Formed Body
16 Jun 22
A zinc-plated steel sheet for hot stamping includes a steel sheet having a predetermined chemical composition and a zinc plating film disposed on the steel sheet.
Hiroyuki NAKAGAWA, Hiroki AKUTSU
Filed: 2 Jul 20
Utility
Zigzagging Control Method for Workpiece
16 Jun 22
There is provided a zigzagging control method for a workpiece including: an estimation step of, before rolling of a tail portion of the workpiece, acquiring at least any one of an inter-roll thrust force estimated based on an inter-roll cross angle and an inter-roll friction coefficient and a material-roll thrust force estimated based on a material-roll cross angle and a material-roll friction coefficient; and a tail control step of, during the rolling of the tail portion of the workpiece, measuring work-side and drive-side rolling loads, correcting a rolling load difference or a rolling load difference ratio based on any two of acquired parameters including a roll-axis-direction thrust counterforce at the measurement of the rolling loads, the inter-roll thrust force, and the material-roll thrust force, and performing reduction leveling control on a rolling mill based on the corrected rolling load difference or rolling load difference ratio.
Kazuma YAMAGUCHI, Atsushi ISHII, Daisuke NIKKUNI
Filed: 10 Apr 20
Utility
Method for producing titanium foil or titanium sheet, and cathode electrode
14 Jun 22
A titanium foil or a titanium sheet is produced by electrodeposition from molten salt using constant current pulse, the method comprising: forming an electrodeposited titanium film on a surface of a cathode electrode made of glassy carbon, graphite, Mo, and Ni, and separating thereafter the electrodeposited titanium film from the cathode electrode by performing one or both of applying an external force to the electrodeposited titanium film and removing the cathode electrode.
Tetsuya Uda, Kouhei Funatsu, Akihiro Kishimoto, Kenichi Mori, Hideki Fujii
Filed: 1 Mar 18
Utility
Method for producing press-formed product
14 Jun 22
A method for producing a press-formed product includes a first pressing step and a second pressing step.
Junki Natori, Yoshiaki Nakazawa, Ryuichi Nishimura, Keiji Ogawa
Filed: 3 Apr 17
Utility
Device for controlling flow in mold and method for controlling flow in mold in thin-slab casting
14 Jun 22
Hiroshi Harada, Keita Ikeda, Masashi Sakamoto, Yui Ito, Takuya Takayama
Filed: 7 Jun 19
Utility
Metal-fiber Reinforced Plastic Composite
9 Jun 22
Masumi KOORI, Kohei UEDA, Atsuo KOGA, Masaharu IBARAGI, Noriyuki NEGI, Masafumi USUI
Filed: 16 Apr 20
Utility
High Strength Steel Sheet
9 Jun 22
A high strength steel sheet according to the present invention contains a predetermined chemical composition, a metallographic structure includes, by an area ratio, ferrite: 20% to 70%, residual austenite: 5% to 40%, fresh martensite: 0% to 30%, tempered martensite and bainite: 20% to 75% in total, and pearlite and cementite: 0% to 10% in total, in a range of a ⅛ thickness to a ⅜ thickness from a surface, a number proportion of residual austenite having an aspect ratio of 2.0 or more with respect to the number of all residual austenite is 50% or more, at a sheet thickness ¼ position of a cross section parallel to a rolling direction and perpendicular to the surface, a standard deviation of area ratios of ferrite measured at 10 points every 50 mm along a width direction is less than 10%, and a tensile strength is 780 MPa or more.
Genki ABUKAWA, Hiroshi SHUTO
Filed: 8 Jul 20
Utility
Steel Sheet and Method for Producing Same
9 Jun 22
Provided is a steel sheet having a predetermined chemical composition and structure wherein (Fe, Mn)2 B precipitates having a circle equivalent diameter of 50 to 300 nm are present in a number density of 1/500 μm2 or more in a surface layer region down to a depth of 100 μm from the surface in the sheet thickness direction.
Kengo TAKEDA, Yuya SUZUKI, Toyomitsu NAKAMURA, Seiji FURUSAKO
Filed: 15 Nov 19
Utility
Steel Shaft Component
9 Jun 22
Kison NISHIHARA, Hiroaki TAHIRA, Yoko SUEYASU
Filed: 9 Apr 20
Utility
Joining Structure, Method for Producing Joining Structure, and Vehicle Body
9 Jun 22
This invention provides a joining structure including a structure joining two flanges together, with which adequate anti-noise performance and anti-vibration performance can be secured even when the sheet thickness is thin.
Takeshi KAWACHI
Filed: 10 Apr 20
Utility
Joint Structure, Automotive Component, and Joint Structure Manufacturing Method
9 Jun 22
A joint structure includes a first sheet member, a second sheet member, a third sheet member, and plural joining parts formed at locations where the first sheet member, the second sheet member, and the third sheet member overlap, so as to join the first sheet member, the second sheet member, and the third sheet member together.
Hiroki FUJIMOTO, Koichi HAMADA, Atsushi ONO, Yasunori SAWA, Toshiya SUZUKI, Tohru OKADA
Filed: 24 Mar 20
Utility
Automobile suspension part
7 Jun 22
An automobile suspension part includes an arm member and a reinforcement, wherein: the arm member includes a top wall part, a first ridge line part, a second ridge line part, a first side wall part, and a second side wall part; the top wall part includes a first attachment part at a first end part; the top wall part includes a second attachment part at a second end part; the reinforcement includes a bottom wall part, a third ridge line part, and a flange part; the third ridge line part is sandwiched between the bottom wall part and the flange part; the bottom wall part is joined to the first side wall part and the second side wall part; the third ridge line part is connected to the first side wall part and the second side wall part; the flange part is joined to the top wall part between the first attachment part and the second attachment part; and the flange part is connected to the first side wall part and the second side wall part.
Soma Sonobe
Filed: 26 Dec 19
Utility
Hold device
7 Jun 22
A hold device is attached to press tooling.
Kazunori Oooka, Toshimitsu Aso, Hiroshi Yoshida, Daisuke Yasufuku, Yasuharu Tanaka, Takashi Miyagi, Junichiro Suzuki, Shinobu Yamamoto
Filed: 6 Dec 18
Utility
Surface-treated steel sheet and method for manufacturing surface-treated steel sheet
7 Jun 22
A surface-treated steel sheet of the present invention includes a base steel sheet and a Ni—Co—Fe alloy-plated layer on at least one surface of the base steel sheet, in which, in the alloy-plated layer, a Ni coating weight is 7.1 to 18.5 g/m2, a Co coating weight is 0.65 to 3.6 g/m2, and a total of the Ni coating weight and the Co coating weight is in a range of 9.0 to 20.0 g/m2.
Takehiro Takahashi, Mamoru Saito, Kiyokazu Ishizuka, Yasuto Goto
Filed: 5 Jul 19