586 patents
Page 15 of 30
Utility
Method for manufacturing panel-like formed article
26 Jan 21
This method for manufacturing a panel-like formed article has preparing a blank material made of a metal sheet having a tensile strength of 390 MPa or more and 980 MPa or less; and press-forming the blank material in a cold manner using a pressing apparatus to form the blank material into the panel-like formed article, in the press-forming, a blank holder, a first punch, and a second punch are relatively moved with respect to a die, thereby pressing the first punch and the second punch to the blank material, and pressing of the second punch to the blank material is completed before pressing of the first punch to the blank material.
Kenichiro Otsuka, Koichi Hamada, Yoshiaki Nakazawa
Filed: 16 Mar 17
Utility
Steel H-shape for low temperature service and manufacturing method therefor
26 Jan 21
Provided is a steel H-shape for low temperature service including a predetermined chemical composition.
Hidetoshi Ito, Kazutoshi Ichikawa
Filed: 2 Mar 17
Utility
Consumable electrode type gas shield arc welding method and arc welding portion
26 Jan 21
Shinji Kodama, Tasuku Zeniya, Shoko Oami, Masahiro Matsuba
Filed: 20 Jan 17
Utility
Titanium sheet and method for manufacturing the same
26 Jan 21
To provide a titanium sheet excellent in formability and a method for manufacturing the same.
Koji Mitsuda, Kazuhiro Takahashi, Hideto Seto
Filed: 8 Jul 16
Utility
Hot rolled steel sheet
19 Jan 21
A hot rolled steel sheet including a chemical composition consisting of, in mass %, C: 0.07-0.22%, Si: 1.00-3.20%, Mn: 0.80-2.20%, Al: 0.010-1.000%, N≤0.0060%, P≤0.050%, S≤0.005%, Ti: 0-0.150%, Nb: 0-0.100%, V: 0-0.300%, Cu: 0-2.00%, Ni: 0-2.00%, Cr: 0-2.00%, Mo: 0-1.00%, B: 0-0.0100%, Mg: 0-0.0100%, Ca: 0-0.0100%, REM: 0-0.1000%, Zr: 0-1.000%, Co: 0-1.000%, Zn: 0-1.000%, W: 0-1.000%, Sn: 0-0.050%, the balance: Fe and impurities, wherein a metal microstructure includes, in area %, at a position ¼ W or ¾ W from an end face of the steel sheet and ¼ t or ¾ t from a surface, retained austenite: more than 2%-10%, martensite ≤2%, bainite: 10-70%, pearlite ≤2%, the balance: ferrite, an average circle-equivalent diameter of a metallic phase constituted of retained austenite/martensite is 1.0 to 5.0 μm, an average of minimum distances between adjacent metallic phases is 3 μm or more, and a standard deviation of nano hardness is 2.5 GPa or less.
Tatsuo Yokoi, Nobuo Yoshikawa, Shigeru Yonemura, Kazuya Ootsuka
Filed: 31 Mar 17
Utility
Method for producing seamless metal tube
19 Jan 21
Provided is a round billet capable of reducing damage on a piercing plug in a method of producing a seamless metal tube with a Mannesmann process.
Masakazu Fujiwara
Filed: 30 Jan 18
Utility
Steel sheet
19 Jan 21
A steel sheet includes a predetermined chemical composition and a metal structure represented by, in area fraction, ferrite: 30% to 50%, granular bainite: 5% to 20%, martensite: 30% to 55%, bainite: less than 35%, and retained austenite and pearlite: 10% or less in total.
Katsuya Nakano, Kunio Hayashi, Yuri Toda, Eisaku Sakurada, Akihiro Uenishi
Filed: 30 Jan 17
Utility
Crankshaft
12 Jan 21
A crankshaft includes a plurality of journals, a plurality of pins, and a plurality of crank arms.
Yukihiko Kimura, Kenji Tamura, Hiroshi Nogami, Sam Soo Hwang, Kunihiro Yabuno
Filed: 17 Jan 19
Utility
Torsion beam manufacturing method, torsion beam manufacturing apparatus, and torsion beam
12 Jan 21
This torsion beam manufacturing method is a method for manufacturing a torsion beam which is provided with a uniformly shaped closed cross-sectional portion in which a cross section orthogonal to a longitudinal direction is a closed cross section having a substantial V-shape or a substantial U-shape with a pair of ear portions, and a shape changing portion which leads to the uniformly shaped closed cross-sectional portion and in which a shape of the closed cross section changes progressively away from the uniformly shaped closed cross-sectional portion, the torsion beam manufacturing method comprising: thickening to form a pair of thickened portions in at least the shape changing portion by pressurizing each of the pair of ear portions from outside against swelling of the pair of ear portions in a slate where both outer surfaces of each of the pair of ear portions are supported.
Keinosuke Iguchi, Masaaki Mizumura
Filed: 2 May 17
Utility
Shape inspection apparatus and shape inspection method
12 Jan 21
A shape inspection apparatus for inspecting a strip-shaped body includes: a line sensor camera; a first illumination light source and a second illumination light source; a measurement control unit; and a data processing unit.
Takayuki Sonoda, Nobuhiro Furuya
Filed: 27 Nov 18
Utility
Steel component, gear component, and producing method for steel component
12 Jan 21
In this steel component, the concentration of C in a surface layer is 0.85 mass % or more to 1.2 mass % or less, which is higher than the concentration of C in a starting material steel, the surface layer has a volume ratio of a retained-austenite structure higher than 0% and lower than 10%, the remainder of the surface layer is a martensitic structure, the area fraction of grain boundary carbides in the surface layer is lower than 2%, a layer inside the surface layer is higher than the surface layer in a volume ratio of a retained-austenite structure, and in the layer inside the surface layer, the remainder is a martensitic structure.
Koji Obayashi, Kazuaki Okada, Keisuke Matsuzaka, Masashi Sakakibara, Manabu Kubota, Kei Miyanishi, Tatsuya Koyama
Filed: 8 Mar 17
Utility
Ceramic laminate
12 Jan 21
Keisuke Tokuhashi, Keiichi Kimura, Tomohiro Uno, Yutaka Sato
Filed: 28 Feb 17
Utility
Spot welding electrode having movable pressing members and spot welding method using same
12 Jan 21
Provided is a spot welding machine able to perform spot welding in which the desired nugget size is formed while suppressing spatter even if the strengths or thicknesses of the metal sheets change, the machine comprising: a pair of electrode tips, a pair of pressing members arranged around the tips, a first power supply, first and second drive mechanisms, and a pressing force control part, wherein the tips and the pressing members are respectively arranged facing each other so as to be able to sandwich a set of sheets between them, the first drive mechanisms give pressing forces pressing the tips against the sheets, the second drive mechanisms give pressing forces pressing the pressing members against the sheets, and the control part independently controls the pressing forces given by the first and second drive mechanisms.
Gen Murayama, Tohru Okada, Masanori Yasuyama
Filed: 31 Oct 16
Utility
Steel sheet and plated steel sheet
12 Jan 21
A steel sheet having a specific chemical composition and structure represented by, by area ratio, ferrite: 5 to 95%, and bainite: 5 to 95%.
Kohichi Sano, Makoto Uno, Ryoichi Nishiyama, Yuji Yamaguchi, Natsuko Sugiura, Masahiro Nakata
Filed: 4 Aug 17
Utility
Ceramic laminate, ceramic insulating substrate, and method for manufacturing ceramic laminate
12 Jan 21
A ceramic laminate improving the mechanical characteristics of a composite ceramic layer which has excellent thermal fatigue resistance, thermal conductivity, and insulation ability and having excellent durability and heat dissipation and insulation ability and a ceramic insulating substrate and a method of production of a ceramic laminate are provided.
Keiichi Kimura, Keisuke Tokuhashi, Tomohiro Uno, Yutaka Sato
Filed: 17 Feb 17
Utility
Wound core and manufacturing method thereof
4 Jan 21
A wound core is formed by laminating a plurality of bent bodies formed from a grain-oriented electrical steel sheet having a coating containing phosphorus formed on a surface, in a sheet thickness direction of the grain-oriented electrical steel sheet, in which the bent body is formed in a rectangular shape by having four flat portions and four corner portions adjacent to the flat portions, the corner portion has a bent region having a total bending angle of approximately 90° in a side view, the number of deformation twins present in the bent region in the side view is five or less per 1 mm of a length of a center line in the bent region in the sheet thickness direction, and the amount of phosphorus eluted from the corner portion in a case of being boiled in water for 30 minutes is 6.0 mg or less per 1 m2 of a surface area of the corner portion.
Takahito Mizumura, Masato Mizokami, Masao Yabumoto, Toshihiko Uemura, Eisuke Minematsu, Fumiaki Takahashi
Filed: 9 Jan 18
Utility
Threaded connection for steel pipe
4 Jan 21
A threaded connection for steel pipe with improved sealing performance is provided.
Masaaki Sugino, Sadao Douchi, Yasuhiro Yamamoto
Filed: 12 Oct 16
Utility
Threaded joint for steel pipes
4 Jan 21
A threaded joint is constructed of a pin and a box.
Yousuke Oku, Masaaki Sugino, Fumio Ota
Filed: 22 Feb 16
Utility
Apparatus and method for manufacturing forged crankshaft
28 Dec 20
A forged crankshaft manufacturing apparatus processes a forged blank with no flash.
Tomohisa Yamashita, Kunihiro Yabuno, Ken Yoshino, Sho Takamoto, Hiroyuki Kurokawa, Kenji Tamura, Junichi Okubo, Kiyoshi Nakayama, Toru Horiuchi
Filed: 18 May 16
Utility
Cold-rolled steel sheet and method of manufacturing same
28 Dec 20
In a cold-rolled steel sheet having a predetermined chemical composition, a metallographic structure contains 40.0% or more and less than 60.0% of a polygonal ferrite, 30.0% or more of a bainitic ferrite, 10.0% to 25.0% of a residual austenite, and 15.0% or less of a martensite, by an area ratio, in the residual austenite, a proportion of the residual austenite in which an aspect ratio is 2.0 or less, a length of a long axis is 1.0 μm or less, and a length of a short axis is 1.0 μm or less, is 80.0% or more, in the bainitic ferrite, a proportion of the bainitic ferrite in which an aspect ratio is 1.7 or less and an average value of a crystal orientation difference in a region surrounded by a boundary in which a crystal orientation difference is 15° or more is 0.5° or more and less than 3.0°, is 80.0% or more, and a connection index D value of the martensite, the bainitic ferrite, and the residual austenite is 0.70 or less.
Kengo Takeda, Kunio Hayashi, Akihiro Uenishi, Masafumi Azuma, Takayuki Nozaki, Yuri Toda
Filed: 23 Feb 16