586 patents
Page 5 of 30
Utility
Mandrel, bent tube, and method and apparatus for producing bent tube
22 Mar 22
A mandrel 10 for producing a thin-walled bent tube having a bending portion with high strength and a small radius of curvature by rotary draw bending without either cracks in an outside of bend or winkles and buckling in an inside of bend occurring includes a shank 14, a connection mechanism 15 and a mandrel ball 16.
Shohei Tamura, Hidehiro Arita
Filed: 20 Feb 18
Utility
Hollow member
22 Mar 22
Satoshi Hirose, Yoshiaki Nakazawa
Filed: 1 Sep 17
Utility
Non-oriented electrical steel sheet
22 Mar 22
A non-oriented electrical steel sheet includes, as a chemical composition, by mass %: C: 0.0015% to 0.0040%; Si: 3.5% to 4.5%; Al: 0.65% or less; Mn: 0.2% to 2.0%; Sn: 0% to 0.20%; Sb: 0% to 0.20%; P: 0.005% to 0.150%; S: 0.0001% to 0.0030%; Ti: 0.0030% or less; Nb: 0.0050% or less; Zr: 0.0030% or less; Mo: 0.030% or less; V: 0.0030% or less; N: 0.0010% to 0.0030%; O: 0.0010% to 0.0500%; Cu: less than 0.10%; Ni: less than 0.50%; and a remainder including Fe and impurities, in which a product sheet thickness is 0.10 mm to 0.30 mm, an average grain size is 10 μm to 40 μm, an iron loss W10/800 is 50 W/Kg or less, a tensile strength is 580 MPa to 700 MPa, and a yield ratio is 0.82 or more.
Yoshiaki Natori, Kazutoshi Takeda, Hiroyoshi Yashiki, Miho Tomita, Hiroshi Fujimura, Takeaki Wakisaka, Tesshu Murakawa, Takuya Matsumoto, Hiroki Hori, Yuuya Gohmoto, O Uyama
Filed: 19 Jul 18
Utility
Nickel-containing steel plate
22 Mar 22
A nickel-containing steel plate according to an aspect of the present invention has a chemical composition within a predetermined range, in which an average coarse grain size of prior austenite which is defined as a simple average value of maximum values of equivalent circle diameters of prior austenite grains in each of ten visual fields having an area of 200 μm2, measured at a ¼t position of the steel plate in a section formed by a rolling direction of the steel plate and a thickness direction of the steel plate is 20 μm or less, and a tensile strength is 690 MPa to 900 MPa.
Hitoshi Furuya, Kentaro Watanabe, Keisuke Mori, Masakazu Asaba, Yoshiaki Suematsu
Filed: 27 Dec 18
Utility
Hot rolled steel sheet and method for producing same
15 Mar 22
A hot rolled steel sheet is provided, which is excellent in collision characteristics, excellent in anisotropy of toughness, and high in strength.
Takeshi Toyoda, Riki Okamoto, Natsuko Sugiura, Tetsuya Hirashima
Filed: 16 Feb 18
Utility
Steel sheet, hot-dip galvanized steel sheet and galvannealed steel sheet
15 Mar 22
A steel sheet having a chemical composition of the base metal including, in mass %, C: 0.17 to 0.40%, Si: 0.10 to 2.50%, Mn: 1.00 to 10.00%, P: 0.001 to 0.03%, S: 0.0001 to 0.02%, Al: 0.001 to 2.50%, N: 0.0001 to 0.010%, O: 0.0001 to 0.010%, Ti: 0 to 0.10%, Nb: 0 to 0.10%, V: 0 to 0.10%, B: 0 to 0.010%, Cr: 0 to 2.00%, Ni: 0 to 2.00%, Cu: 0 to 2.00%, Mo: 0 to 2.00%, Ca: 0 to 0.50%, Mg: 0 to 0.50%, REM: 0 to 0.50%, the balance: Fe and impurities, wherein the steel sheet has an internal oxidized layer in which at least one part of a crystal grain boundary is covered by oxides, and in which a grain boundary coverage ratio of oxides is 60% or more in a region from the surface of the base metal to a depth of 5.0 μm.
Kengo Takeda, Kunio Hayashi, Akihiro Uenishi, Hiroyuki Kawata, Chisato Yoshinaga, Yasunobu Miyazaki, Toyomitsu Nakamura
Filed: 15 Dec 17
Utility
Metal sheet forming method, intermediate shape design method, metal sheet forming die, computer program, and recording medium
8 Mar 22
A method of forming a metal sheet into a target shape by press-forming, such that the metal sheet is formed into an intermediate shape that is different from the target shape and then the target shape is formed from the intermediate shape, the method includes: when forming the intermediate shape from the metal sheet, forming the intermediate shape by forming a first region including at least a portion at which a ratio of sheet thickness reduction from the metal sheet is larger when the target shape is formed via the intermediate shape than when the target shape is formed directly from the metal sheet.
Yasuharu Tanaka, Takashi Miyagi, Misao Ogawa
Filed: 25 Dec 17
Utility
Member and vehicle frame
8 Mar 22
This member includes a first sheet material and a second sheet material overlapped with the first sheet material, and the first sheet material and the second sheet material are joined to each other at an interface therebetween by three joint line portions.
Yasuhiro Ito
Filed: 31 Oct 19
Utility
Composition, and threaded connection for pipes or tubes including lubricant coating layer formed from the composition
8 Mar 22
The composition according to the present embodiment is a composition for forming a lubricant coating layer on a threaded connection for pipes or tubes, and contains Cr2O3, a metal soap, a wax and a basic metal salt of an aromatic organic acid.
Kunio Goto
Filed: 12 Oct 18
Utility
Austenitic stainless steel
8 Mar 22
An austenitic stainless steel according to the present invention has a chemical composition containing, by mass %: C: 0.01 to 0.15%; Si: 2.0% or less; Mn: 3.0% or less; Cr: 10.0 to 20.0%; Ni: 5.0 to 13.0%; N: 0.01 to 0.30%; Nb: 0 to 0.5%; Ti: 0 to 0.5%; and V: 0 to 0.5%, with the balance: Fe and impurities, wherein an average grain size is 10.0 μm or less, a difference in value of an average lattice constant dAve. (={dγ(111)×Iγ(111)+dγ(200)×Iγ(200)+dγ(220)×Iγ(220)+dγ(311)×Iγ(311)}/{Iγ(111)+Iγ(200)+Iγ(220)+Iγ(311)}) of an austenite phase between a surface portion and a center portion is 0.010 Å or more, and a value of a diffraction peak integrated intensity ratio r (=100×ΣIγ/ΣIALL) at a surface is 95% or more.
Kazuhiko Adachi, Akihiro Nishimura, Shinichi Teraoka, Hideki Fujii
Filed: 27 Sep 16
Utility
Hot-dip galvanized steel sheet
8 Mar 22
A hot-dip galvanized steel sheet including: a hot-dip galvanizing layer on at least one side of a base steel sheet.
Atsushi Morishita, Taihei Kaneto, Satoshi Uchida, Tatsuya Nakada, Yuji Yamaguchi
Filed: 31 Jul 17
Utility
Austenitic heat resistant alloy and method for producing the same
8 Mar 22
Provided is an austenitic heat resistant alloy capable of exhibiting sufficient molten-salt corrosion resistance even when exposed to a molten salt of 600° C., and a production method thereof.
Takumi Nishimoto, Yoshitaka Nishiyama
Filed: 8 Jan 19
Utility
Structural member and structural member for vehicle
1 Mar 22
A structural member 10 includes a hat member 1 and a closing plate 2.
Satoshi Hirose, Yuichi Ishimori, Hiroshi Fukuchi
Filed: 28 Dec 17
Utility
High strength steel sheet
1 Mar 22
High strength steel sheet having a tensile strength of 800 MPa or more comprising a middle part in sheet thickness and a soft surface layer arranged at one side or both sides of the middle part in sheet thickness, wherein each soft surface layer has a thickness of more than 10 μm and 30% or less of the sheet thickness, the soft surface layer has an average Vickers hardness of 0.60 time or less the average Vickers hardness of the sheet thickness ½ position, and the soft surface layer has a nano-hardness standard deviation of 0.8 or less is provided.
Katsuya Nakano, Yuya Suzuki, Genki Abukawa, Kunio Hayashi
Filed: 20 Feb 18
Utility
Hot forged steel material
1 Mar 22
Yoko Sueyasu, Hiroaki Tahira, Ken Yoshino, Kison Nishihara
Filed: 31 Oct 18
Utility
Method for producing forged crankshaft
22 Feb 22
Provided is a production method, including a first preforming process for obtaining a first preform from a billet, a second preforming process for obtaining a final preform from the first preform, and a finish forging process for forming the final preform into a finishing dimension of a forged crankshaft.
Junichi Okubo, Kenji Tamura, Kunihiro Yoshida, Sam Soo Hwang, Ryusuke Nakano, Masao Hori, Yukihiro Ota
Filed: 30 Jul 18
Utility
Method of dechromizing molten iron and method of manufacturing phosphate fertilizer raw material
22 Feb 22
On molten iron having a P concentration of 2 to 4 mass % and having a Cr concentration of 0.3 to 1.2 mass %, a dechromization treatment is performed by adjusting a basicity (CaO mass %)/(SiO2 mass %) of slag to greater than 0.1 and 1 or less and supplying an oxygen source with a molten iron temperature falling within a range of 1250 to 1500° C. to manufacture molten iron having a P concentration of 1.9 to 3.8 mass % and having a Cr concentration of less than 0.2 mass %.
Motohiro Sakamoto
Filed: 16 Oct 18
Utility
Hot-rolled steel sheet
22 Feb 22
A hot-rolled steel sheet includes, by mass %, C: 0.030% or more and less than 0.075%, Si+Al: 0.08% to 0.40%, Mn: 0.5% to 2.0%, and Ti: 0.020% to 0.150%, and includes a microstructure having a ferrite and a martensite.
Daisuke Maeda, Hiroshi Shuto, Kazuya Ootsuka, Akifumi Sakakibara, Shinsuke Kai
Filed: 18 Aug 16
Utility
Eddy current damper
22 Feb 22
An eddy current damper includes a screw shaft, first permanent magnets, second permanent magnets, a cylindrical magnet holding member, a cylindrical conductive member, and a ball nut meshing with a screw shaft.
Kenji Imanishi, Hiroyuki Yamaguchi, Ryohsuke Masui, Shigeki Nakaminami, Hidenori Kida
Filed: 24 Aug 18
Utility
Steel material for soft magnetic part, soft magnetic part, and method for producing soft magnetic part
15 Feb 22
Makoto Egashira, Hidekazu Sueno, Hitoshi Matsumoto
Filed: 7 Dec 17