586 patents
Page 4 of 30
Utility
Metal/fiber-reinforced resin material composite
17 May 22
Masaharu Ibaragi, Noriyuki Negi, Masafumi Usui, Masako Nakai
Filed: 28 Dec 18
Utility
Flux-cored wire, manufacturing method of welded joint, and welded joint
17 May 22
According to an aspect of the present invention, there is provided a flux-cored wire including a steel sheath and a flux that fills the steel sheath.
Kotaro Watanabe, Tatsuya Kumagai, Hiroki Fujimoto, Yasuhito Totsuka
Filed: 8 Mar 16
Utility
High strength hot-dip galvanized steel sheet and production method therefor
17 May 22
A high-strength hot-dip galvanized steel sheet contains predetermined amounts of C, Si, Mn, P, S, N, O, sol.
Takafumi Yokoyama, Yuji Yamaguchi, Masahiro Nakata, Kunio Hayashi, Satoshi Uchida, Takuma Kawanaka
Filed: 22 Mar 18
Utility
Steel material suitable for use in sour environment
17 May 22
The steel material according to the present disclosure contains a chemical composition consisting of, in mass %, C: more than 0.50 to 0.80%, Si: 0.05 to 1.00%, Mn: 0.05 to 1.00%, P: 0.025% or less, S: 0.0100% or less, Al: 0.005 to 0.100%, Cr: 0.20 to 1.50%, Mo: 0.25 to 1.50%, Ti: 0.002 to 0.050%, B: 0.0001 to 0.0050%, N: 0.0100% or less and O: 0.0100% or less, with the balance being Fe and impurities.
Shinji Yoshida, Yuji Arai, Atsushi Soma, Hiroki Kamitani
Filed: 22 Mar 19
Utility
Insulating coating for electrical steel sheet
17 May 22
An insulating coating for an electrical steel sheet is provided that is formed on a surface of a base metal of the electrical steel sheet and that contains a polyvalent metal phosphate of one or more elements selected from Al, Zn, Mg and Ca, and has an enriched layer of a divalent metal at an interface with the surface of the base metal.
Shuichi Yamazaki, Masaru Takahashi, Kazutoshi Takeda, Hiroyasu Fujii, Akira Akagi, Hiroki Hori
Filed: 25 Apr 16
Utility
Cold-rolled steel sheet and hot-dip galvanized cold-rolled steel sheet
10 May 22
A cold-rolled steel sheet is provided that has a tensile strength of 980 MPa or more, and has a prescribed chemical composition.
Takafumi Yokoyama, Riki Okamoto, Yuji Yamaguchi, Kazuki Shiokawa, Yuichi Nakahira, Hiroyuki Kawata
Filed: 31 Mar 17
Utility
Hot rolled steel sheet and method for manufacturing same
10 May 22
A hot rolled steel sheet according to an aspect of the present invention has a predetermined chemical composition, and a metallographic structure in which martensite is the major structure, wherein an average length of grains in an L direction parallel to a rolling direction is 0.2 μm or more and 5.0 μm or less, an average length of grains in a C direction parallel to a transverse direction is 0.1 μm or more and 5.0 μm or less, the ratio of the average length in the C direction to the average length in the L direction is 0.2 or more and 5.0 or less, and the tensile strength is 1180 MPa or more.
Tetsuya Hirashima, Takeshi Toyoda
Filed: 9 Aug 18
Utility
Austenitic wear-resistant steel plate
10 May 22
An austenitic wear-resistant steel plate according to an aspect of the present invention has a predetermined chemical composition, amounts of C and Mn by mass % satisfy −13.75×C+16.5≤Mn≤−20×C+30, the volume fraction of austenite in a metallographic structure is 40% or more and less than 95%, and the average grain size of the austenite is 40 to 300 μm.
Masaaki Fujioka, Tetsuya Namegawa, Masahide Yoshimura, Masanori Minagawa
Filed: 29 Mar 18
Utility
Steel material for CVT sheave, CVT sheave, and method for manufacturing CVT sheave
10 May 22
Steel materials for continuously variable transmissions sheaves, and methods for manufacturing a continuously variable transmission sheaves, are provided.
Masashi Hattori, Kazumichi Tsukuda, Hiroyuki Nozaki, Daisuke Kasai, Takuya Watanabe, Tetsuya Ohashi, Shouji Toudou, Akira Shiga
Filed: 18 Jul 17
Utility
Saddle-shaped press-molded article manufacturing method, pressing apparatus, and manufacturing method to manufacture saddle-shaped press-molded article
26 Apr 22
According to the present disclosure, a manufacturing method for a saddle-shaped press-molded article includes curling a blank at a top plate configuration location of the blank that will form a top plate portion, applying the curl with a first force acting from an inner face side toward an outer face side of the blank at the top plate configuration location, applying the curl with a net force configured by second forces acting in mutually facing directions and a third force acting in the opposing direction to the first force at the outer face side of respective vertical wall configuration locations of the blank that will be molded into vertical wall portions, and in a state in which the top plate configuration location is curled, restraining end portion inverted ridge configuration location that will be molded into end portion inverted ridge portion, the top plate configuration location, the vertical wall configuration locations, and end portion flange configuration location that will be molded into end portion flange.
Satoshi Shirakami, Yoshiaki Nakazawa
Filed: 7 May 19
Utility
Seamless steel pipe and method for producing the seamless steel pipe
26 Apr 22
The seamless steel pipe of the present embodiment consists of in mass %, C: 0.21 to 0.35%, Si: 0.10 to 0.50%, Mn: 0.05 to 1.00%, P: 0.025% or less, S: 0.010% or less, Al: 0.005 to 0.100%, N: 0.010% or less, Cr: 0.05 to 1.50%, Mo: 0.10 to 1.50%, Nb: 0.010 to 0.050%, B: 0.0003 to 0.0050%, and Ti: 0.002 to 0.050%, the balance being Fe and impurities.
Atsushi Soma, Yuji Arai, Yosuke Tatebayashi, Keisuke Furo, Takenori Kuramoto, Hiroki Kamitani, Kouji Yamane
Filed: 18 May 17
Utility
Hot-rolled steel sheet and method for manufacturing same
26 Apr 22
A hot-rolled steel sheet according to an aspect of the present invention has a predetermined chemical composition, in which, in a location at a depth of ¼ of a sheet thickness from a surface, an area ratio of ferrite is 10% to 55%, a total area ratio of bainite and martensite is 45% to 90%, a total area ratio of the ferrite, the bainite, and the martensite is 90% or more, an average crystal grain size is 12.0 μm or less, in a texture measured in a sheet thickness central portion, a maximum pole density of orientation groups of {100} <011>, {211} <011>, {311} <011>, {110} <011>, and {332} <113> is 8.0 or less, a total of pole densities of {211} <011> and {332} <113> is 10.0 or less, and a tensile strength is 950 MPa or more.
Mitsuru Yoshida, Nobusato Kojima, Yuuki Kanzawa, Kohhei Kamiya
Filed: 6 Jul 18
Utility
Threaded connection for steel pipe
26 Apr 22
A threaded connection for steel pipe is provided that improves its internal-pressure sealability while maintaining the high external-pressure sealability of a threaded connection having a nose used in a steel pipe with large diameter and large wall thickness.
Masaaki Sugino, Yousuke Oku, Keita Inose
Filed: 2 Oct 18
Utility
Thread shape measuring apparatus and measuring method
26 Apr 22
A thread shape measuring apparatus includes: a first illuminating unit that has an optical axis orthogonal to a cross section including a thread axis, and illuminates the thread portion; a second illuminating unit that has an optical axis that forms an angle θ larger than a lead angle γ of the thread portion with respect to the direction orthogonal to the cross section and illuminates the thread portion; an image-capturing unit that has a visual axis parallel to the optical axis of the first illuminating unit, includes a telecentric lens, has a focusing position matching the cross section, and detects, out of the light emitted from the first illuminating unit or the second illuminating unit, light that has not been blocked by the thread portion to capture an image of the detected light; and an operation unit that calculates a shape of the thread portion based on the captured image.
Tatsuro Honda, Shinichi Oshima, Yoshito Isei, Kenshiro Oie, Takenori Kuramoto, Takanori Tanaka
Filed: 26 Apr 19
Utility
Method for producing seamless metal pipe
19 Apr 22
Kouji Yamane, Kazuhiro Shimoda, Yuji Inoue, Shusuke Shimooka, Yuichi Yamanari
Filed: 8 Jun 18
Utility
Method for producing H-shaped steel
5 Apr 22
A large-size H-shaped steel product is produced by performing a rough rolling step including 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 by rotating the material to be rolled after completion of the edging rolling step by 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.
Hiroshi Yamashita
Filed: 11 Jan 19
Utility
Threaded connection for pipes and method for producing threaded connection for pipes
5 Apr 22
The threaded connection for pipes includes a pin, a box and a Zn—Ni alloy plating layer.
Masanari Kimoto, Masahiro Oshima
Filed: 30 Aug 18
Utility
Non-oriented electrical steel sheet, manufacturing method of non-oriented electrical steel sheet, and manufacturing method of motor core
5 Apr 22
Yoshiaki Natori, Hiroyoshi Yashiki, Masaru Takahashi, Kazutoshi Takeda, Takuya Matsumoto
Filed: 2 Aug 17
Utility
Hot-stamped body
29 Mar 22
There is provided a hot-stamped body including: a steel base metal; and a metallic layer formed on a surface of the steel base metal, wherein the metallic layer includes: an interface layer that contains, in mass %, Al: 30.0 to 36.0%, has a thickness of 100 nm to 15 μm, and is located in an interface between the metallic layer and the steel base metal; and a principal layer that includes coexisting Zn phases and insular FeAl2 phases, is located on the interface layer, and has a thickness of 1 μm to 40 μm.
Takuya Mitsunobu, Kohei Tokuda, Akihiro Sengoku, Kenichiro Matsumura
Filed: 20 Mar 18
Utility
Cr-Ni alloy and seamless steel pipe made of Cr-Ni alloy
29 Mar 22
Akiko Tomio, Masaki Ueyama, Yusaku Tomio
Filed: 17 Jan 19