586 patents
Page 2 of 30
Utility
Flux-cored wire, manufacturing method of welded joint, and welded joint
2 Aug 22
A flux-cored wire according to an aspect of the present invention includes: a steel sheath; and a flux filling the inside of the steel sheath, in which the flux contains 0.11% or more in total of a fluoride in terms of F-equivalent value, 4.30% to 7.50% of a Ti oxide in terms of TiO2 equivalent, 0.30% to 2.40% in total of an oxide in terms of mass %, and 0% to 0.60% in total of a carbonate in terms of mass %, the amount of a Ca oxide in terms of CaO is less than 0.20% in terms of mass %, the amount of CaF2 is less than 0.50%, a chemical composition of the flux-cored wire is within a predetermined range, a Z value is 2.00% or less, a V value is 5.0 to 27.0, and Ceq is 0.30% to 1.00% or less.
Hiroki Fujimoto, Kotaro Watanabe, Yasuhito Totsuka
Filed: 8 Nov 16
Utility
Structural member for automobiles
2 Aug 22
A structural member for an automobile to be disclosed includes a press-formed product formed from one steel sheet and a reinforcing member fixed to the press-formed product.
Kenichiro Otsuka
Filed: 10 Apr 18
Utility
Manufacturing method of steel sheet
2 Aug 22
A manufacturing method of a steel sheet includes: a step of performing continuous casting of molten steel having a Si content of 0.4 mass % to 3.0 mass % to obtain a slab; a step of performing hot rolling of the slab to obtain a hot-rolled steel sheet; a step of performing cold rolling of the hot-rolled steel sheet to obtain a cold-rolled steel sheet; a step of performing cold-rolled sheet annealing of the cold-rolled steel sheet; a step of performing pickling after the cold-rolled sheet annealing; a step of performing water washing after the pickling; and a step of performing drying after the water washing.
Toyomitsu Nakamura, Kenichiro Matsumura
Filed: 24 Mar 17
Utility
Hot-rolled steel sheet
2 Aug 22
A hot-rolled steel sheet includes a specific chemical composition, and includes a microstructure represented by, in vol %: retained austenite: 2% to 30%; ferrite: 20% to 85%; bainite: 10% to 60%; pearlite: 5% or less; and martensite: 10% or less.
Tatsuo Yokoi, Mitsuru Yoshida, Natsuko Sugiura, Hiroshi Shuto, Masayuki Wakita
Filed: 20 Feb 15
Utility
Non-oriented electrical steel sheet and method for manufacturing thereof
26 Jul 22
A non-oriented electrical steel sheet includes C: 0 to 0.0050 mass %, Si: 0.50 to 2.70 mass %, Mn: 0.10 to 3.00 mass %, Al: 1.00 to 2.70 mass %, and P: 0.050 to 0.100 mass %.
Satoshi Kano, Takeaki Wakisaka, Ichiro Tanaka
Filed: 10 Mar 16
Utility
Composition, threaded joint for pipes including solid lubricant coating formed from the composition, and method for producing the threaded joint for pipes
26 Jul 22
A threaded joint for pipes disclosed herein includes a pin and a box.
Kunio Goto
Filed: 15 Sep 16
Utility
Front axle beam and production method thereof
19 Jul 22
The production method disclosed is a method for producing a front axle beam.
Kenji Tamura, Kenji Imanishi, Sam Soo Hwang, Kunihiro Yabuno, Kunihiro Yoshida, Koichiro Ishihara
Filed: 3 Apr 18
Utility
Titanium alloy material
19 Jul 22
A titanium alloy material contains: in mass %, Cu: 0.7% to 1.4%; Sn: 0.5% to 1.5%; Si: 0.10% to 0.45%; Nb: 0.05% to 0.50%; Fe: 0.00% to 0.08%; O: 0.00% to 0.08%; and the balance composed of Ti and impurities, in which in a structure, an area fraction of an α phase is 96.0% or more and an area fraction of an intermetallic compound is 1.0% or more, and an average crystal grain size of the α phase is 10 μm or more and 100 μm or less and an average grain size of the intermetallic compound is 0.1 to 3.0 μm.
Hidenori Takebe, Sosuke Nishiwaki, Tomonori Kunieda
Filed: 7 Feb 18
Utility
Threaded connection for steel pipe
19 Jul 22
Yousuke Oku, Sadao Douchi
Filed: 24 Jul 19
Utility
Spring steel
19 Jul 22
There is provided a spring steel including predetermined chemical composition, in which ([Ti mass %]−3.43×[N mass %])/[S mass %]>4.0, and [Ni mass %]+[Cu mass %]<0.75 are satisfied, and an appearance frequency of MnS is less than 20% among inclusions having an equivalent circle diameter of 1 μm or more which are observed at a ¼ position of a diameter from a surface.
Takahisa Suzuki, Suguru Yoshida, Yutaka Neishi
Filed: 26 Jan 17
Utility
Threaded connection for steel pipes
19 Jul 22
The disclosed threaded connection for steel pipes includes a pin including a tapered male thread part and a shoulder part, and a box including a tapered female thread part and a shoulder part.
Masaaki Sugino
Filed: 1 Jul 19
Utility
Threaded connection for pipes or tubes and method for producing the threaded connection for pipes or tubes
19 Jul 22
This invention provides a threaded connection for pipes or tubes having excellent misalignment resistance and high torque on shoulder resistance, and also having excellent corrosion resistance properties, as well as a method for producing the threaded connection for pipes or tubes.
Kunio Goto
Filed: 10 May 18
Utility
Grain-oriented electrical steel sheet
19 Jul 22
A grain-oriented electrical steel sheet according to the present embodiment is a grain-oriented electrical steel sheet having a groove formed on a surface, in which, in a cross section of the grain-oriented electrical steel sheet orthogonal to the groove, a KAM value is 0.1 or more and 3.0 or less in a region on a central side in a thickness direction of the grain-oriented electrical steel sheet with respect to the groove, the region being surrounded by a square having one side in contact with a groove bottom of the groove and having a length of 50 μm in each side.
Hideyuki Hamamura, Satoshi Arai, Takashi Kataoka, Shunsuke Okumura
Filed: 26 Feb 19
Utility
Nickel-containing steel for low temperature
12 Jul 22
This nickel-containing steel for low temperature includes, as a chemical composition, by mass %: C: 0.020% to 0.070%; Si: 0.03% to 0.30%; Mn: 0.20% to 0.80%; Ni: 12.5% to 17.4%; Al: 0.010% to 0.060%; N: 0.0015% to 0.0060%; and O: 0.0007% to 0.0030%, in which a metallographic structure contains 2.0% to 30.0% of an austenite phase by volume fraction %, in a thickness middle portion of a section parallel to a rolling direction and a thickness direction, an average grain size of prior austenite grains is 3.0 μm to 20.0 μm, and an average aspect ratio of the prior austenite grains is 1.0 to 2.9.
Manabu Hoshino, Tetsuya Namegawa, Shinichi Omiya, Takayuki Kagaya
Filed: 26 Oct 17
Utility
Negative electrode active material, negative electrode, and battery
12 Jul 22
The negative electrode active material according to the present embodiment includes alloy particle containing an alloy component and oxygen of 0.50 to 3.00 mass %.
Sukeyoshi Yamamoto, Tatsuo Nagata, Koji Moriguchi
Filed: 17 Jul 18
Utility
Electrical steel sheet and method for manufacturing the same
5 Jul 22
An electrical steel sheet (10) is provided with a base iron (1) and an insulating film (2) formed on a surface of the base iron (1).
Kazutoshi Takeda, Kenji Kosuge, Tatsuya Takase, Kohji Muneda
Filed: 15 Jul 11
Utility
Grain-oriented electrical steel sheet
5 Jul 22
A grain-oriented electrical steel sheet includes a steel layer and an insulation coating arranged in directly contact with the steel layer thereon.
Hiroyoshi Yashiki, Kenichi Murakami, Nobusato Morishige, Hirotoshi Tada, Yoshiaki Natori
Filed: 18 Feb 20
Utility
Steel sheet and manufacturing method therefor
5 Jul 22
A steel sheet has a chemical composition with a steel structure containing, by volume fraction, soft ferrite: 0-30%, retained austenite: 3-40%, fresh martensite: 0-30%, pearlite and cementite: 0-10%, and a remainder including hard ferrite.
Takafumi Yokoyama, Kohichi Sano, Riki Okamoto, Hiroyuki Kawata, Eisaku Sakurada, Yuji Yamaguchi, Kazuki Shiokawa, Yuichi Nakahira, Kohei Ueda, Masahiro Nakata, Satoshi Uchida
Filed: 30 Mar 18
Utility
Organic resin-coated plated steel sheet
5 Jul 22
The present invention provides a noble and improved organic resin-coated plated steel sheet which is improved in degreasing properties while securing the characteristics required for the organic resin-coated plated steel sheet.
Fumio Shibao, Masayoshi Nagatomi
Filed: 9 Mar 18
Utility
Method for producing H-shaped steel
21 Jun 22
A method for producing H-shaped steel, the method includes: a rough rolling step; an intermediate rolling step; and a finish rolling step, wherein: the rough rolling step includes: an edging rolling step of rolling and shaping a material to be rolled into a predetermined almost dog-bone shape; and a flat rolling step of performing rolling of a web part with the material to be rolled after completion of the edging rolling step rotated 90° or 270°; upper and lower caliber rolls of at least one caliber of calibers configured to perform the flat rolling step include recessed parts configured to form a raised part at a middle of a web part of the material to be rolled, the recessed parts being provided at roll barrel length middle parts of the upper and lower caliber rolls; and a side surface inclination angle α of the formed raised part is set to 30° or more.
Hiroshi Yamashita
Filed: 19 Dec 16