586 patents
Page 25 of 30
Utility
Titanium cast product for hot rolling having excellent surface properties after hot rolling even when slabbing step and finishing step are omitted, and method for producing same
24 Feb 20
Provided is a titanium cast product for hot rolling made of commercial pure titanium or a titanium alloy, the titanium cast product including, in a surface serving as a rolling surface, a fine structure layer that is formed of an acicular structure formed in the outermost surface by melting and re-solidification treatment and that has a thickness of more than or equal to 5 mm and less than 9 mm in depth.
Tomonori Kunieda, Yoshitsugu Tatsuzawa, Kenichi Mori, Hideki Fujii
Filed: 29 Sep 14
Utility
Nitrided or soft nitrided part with excellent wear resistance and pitting resistance, and nitriding and soft nitriding method
24 Feb 20
A nitrided part and soft nitrided part with excellent wear resistance and pitting resistance and a nitriding method and soft nitriding method are provided, specifically, a nitrided part or soft nitrided part made by a steel material comprising, by mass %, C: 0.05 to 0.3%, Si: 0.05 to 1.5%, Mn: 0.2 to 1.5%, P: 0.025% or less, S: 0.003 to 0.05%, Cr: 0.5 to 2.0%, Al: 0.01 to 0.05%, and N: 0.003 to 0.025% and having a balance of Fe and impurities, wherein, the surface layer comprises a compound layer containing iron, nitrogen, and carbon and a nitrogen diffusion layer positioned below the compound layer, the compound layer comprises an ε single phase, the ε single phase has a thickness of 8 to 30 μm and a Vicker's hardness of 680 HV or more, and the ε single phase has a volume ratio of pores of less than 10%.
Takahide Umehara, Masato Yuya
Filed: 23 Mar 16
Utility
Steel sheet for container and method for producing steel sheet for container
17 Feb 20
A steel sheet for a container includes a steel sheet, a Sn coated layer which is provided as an upper layer of the steel sheet and contains Sn in an amount of 560 to 5600 mg/m2 in terms of Sn metal, and a chemical treatment layer which is provided as an upper layer of the Sn coated layer and contains a Zr compound in an amount of 3.0 to 30.0 mg/m2 in terms of Zr metal and a Mg compound in an amount of 0.50 to 5.00 mg/m2 in terms of Mg metal.
Akira Tachiki, Shigeru Hirano, Yoshiaki Tani, Hirokazu Yokoya, Morio Yanagihara, Makoto Kawabata
Filed: 14 Apr 16
Utility
Burring method and burring apparatus
17 Feb 20
In the present invention, in a piercing punch and a burring punch which are shaft members having a first axis line as the center axis lines and are provided so as to be movable along the first axis line, first, after prepared holes having the first axis line as the center axis lines with respect to the first wall portion and the second wall portion are formed using the piercing punch, burring holes having the first axis line as the center axis lines with respect to the first wall portion and the second wall portion are formed using the burring punch.
Satoshi Shirakami, Masaaki Mizumura, Tohru Yoshida
Filed: 28 Jan 15
Utility
Heat-treated steel sheet member and method for producing the same
17 Feb 20
A heat-treated steel sheet member having a composition including, by mass %: C: 0.05 to 0.50%; Si: 0.50 to 5.0%; Mn: 1.5 to 4.0%; P: 0.05% or less; S: 0.05% or less; N: 0.01% or less; Ti: 0.01 to 0.10%; B: 0.0005 to 0.010%; Cr: 0 to 1.0%; Ni: 0 to 2.0%; Cu; 0 to 1.0%; Mo: 0 to 1.0%; V: 0 to 1.0%; Ca: 0 to 0.01%; Al: 0 to 1.0%; Nb: 0 to 1.0%; REM: 0 to 0.1%; and the balance: Fe and impurities.
Yoshihiro Suwa, Shinichiro Tabata, Masafumi Azuma, Kazuo Hikida
Filed: 6 Apr 16
Utility
Induction heating device for metal strip
17 Feb 20
An induction heating device for a metal strip, including: an induction coil provided on one side or on both sides of a front face side or a reverse face side of a metal strip, and that induces an induction current in the strip when a primary current is passed through the coil, the induction current configuring a closed loop as viewed from a direction perpendicular to a metal strip face; plural magnetic cores disposed at a specific position, this being a position at a back face side of the coil and separated from the strip by a specific distance, to concentrate magnetic flux generated by the coil in the strip; and a moving mechanism coupled to the magnetic cores, and that moves the cores to increase or decrease a disposed number of the cores at the specific position disposed side-by-side along a metal strip width direction.
Masato Taira, Yoshiaki Hirota, Takeo Itoh
Filed: 2 Sep 15
Utility
Coated steel
17 Feb 20
The invention provides a coated steel including a steel, a coated metal layer coated on a surface of the steel, and an interfacial alloy layer formed at the boundary between the steel and the coated metal layer, in which the coated metal layer has a predetermined composition and structure, and in which the thickness of the coated metal layer is 0.1 μm or more, and the thickness of the interfacial alloy layer is 500 nm or less.
Akinobu Kobayashi, Kohei Tokuda, Nobuyuki Shimoda, Yasuto Goto, Kenichiro Matsumura
Filed: 28 Sep 16
Utility
Low alloy oil-well steel pipe
17 Feb 20
Provided is a low alloy oil-well steel pipe having a yield strength of 827 MPa or more, and an excellent SSC resistance.
Keiichi Kondo, Yuji Arai
Filed: 20 Jul 15
Utility
Rail and production method therefor
17 Feb 20
A rail provided by the present invention includes: has a predetermined chemical components, wherein, in a region from a head surface constituted of a surface of a top head portion and a surface of a corner head portion to a depth of 10 mm, a total amount of pearlite structures and bainite structures is 95% by area or more, and an amount of the bainite structures is 20% by area or more and less than 50% by area, and an average hardness of the region from the head surface to a depth of 10 mm is in a range of Hv 400 to Hv 500.
Masaharu Ueda, Teruhisa Miyazaki, Takuya Tanahashi
Filed: 28 May 15
Utility
Induction heating device for metal strip
17 Feb 20
An induction heating device for a metal strip includes a first induction coil member and a second induction coil member provided in parallel with a metal strip across the metal strip that travels in a longitudinal direction, provided to protrude from the metal strip, and provided so as not to overlap each other in the traveling direction of the metal strip, and a magnetic core member provided between the first induction coil member and the second induction coil member, and provided to cover a large area of an end portion in the sheet width direction of the metal strip on the side of each of the first induction coil member and the second induction coil member, and cover a small area of the end at a center portion between the first induction coil member and the second induction coil member.
Yoshiaki Hirota, Masato Taira
Filed: 3 Sep 15
Utility
Exterior panel and manufacturing method of exterior panel
10 Feb 20
Satoshi Shirakami, Yoshiaki Nakazawa, Nobutaka Shimizu
Filed: 11 Dec 17
Utility
Welded joint and method of manufacturing welded joint
10 Feb 20
Kana Jotoku, Hiroyuki Hirata, Tomohiko Omura, Jun Nakamura, Takahiro Osuki
Filed: 19 Feb 15
Utility
Ni—Cr alloy material and seamless oil country tubular goods using the same
10 Feb 20
A Ni—Cr alloy material has a chemical composition that consists of; Si: 0.01 to 0.5%, Mn: 0.01 to less than 1.0%, Cu: 0.01 to less than 1.0%, Ni: 48 to less than 55%, Cr: 22 to 28%, Mo: 5.6 to less than 7.0%, N: 0.04 to 0.16%, sol.Al: 0.03 to 0.20%, REM: 0.01 to 0.074%, W: 0% or more and less than 8.0%, Co: 0 to 2.0%; one or more of Ca and Mg: 0.0003 to 0.01% in total, and one or more of Ti, Nb, Zr, and V: 0 to 0.5% in total, the balance thereof being Fe and impurities.
Yusaku Tomio, Masayuki Sagara
Filed: 10 Nov 14
Utility
Electrical steel sheet
3 Feb 20
An electrical steel sheet (1) includes a base material (2) of electrical steel, and an insulating film (3) formed on a surface of the base material (2), the insulating film (3) containing a polyvalent metal phosphate and Fe.
Masaru Takahashi, Shuichi Yamazaki, Kazutoshi Takeda, Hiroyasu Fujii
Filed: 20 Dec 15
Utility
Hot-dip zinc-based plated steel sheet
3 Feb 20
Yasuaki Kawamura, Koji Akioka, Akihiro Sengoku
Filed: 30 Mar 16
Utility
Method of welding overlapped portion, method of manufacturing overlap-welded member, overlap-welded member, and automotive part
3 Feb 20
A method of welding an overlapped portion according to the present invention in which a plurality of steel sheet members are joined at an overlapped portion, and at least one of the plurality of steel sheet members contains martensite, includes: forming a spot-welded portion having a nugget in the overlapped portion; and emitting a laser beam to form a melted and solidified portion crossing an end of the nugget and located between the nugget and a position externally spaced apart from an end of the nugget by not less than 3 mm, this melted and solidified portion being formed in the steel sheet member containing the martensite so as to have a depth of not less than 50% of the thickness of the steel sheet member containing the martensite at a position externally spaced apart from the end of the nugget by 1 mm.
Hiroki Fujimoto, Tohru Okada, Masanori Yasuyama
Filed: 7 Aug 13
Utility
Ni-based alloy pipe or tube for nuclear power
3 Feb 20
Kiyoko Takeda, Shoji Kinomura
Filed: 20 Jun 16
Utility
Steel material and oil-well steel pipe
3 Feb 20
Yuji Arai
Filed: 19 Feb 17
Utility
Hot-stamped steel, cold-rolled steel sheet and method for producing hot-stamped steel
27 Jan 20
A hot-stamped steel according to the present invention has a predetermined chemical composition, satisfies (5×[Si]+[Mn])/[C]>10 when [C] is the amount of C by mass %, [Si] is the amount of Si by mass %, and [Mn] is the amount of Mn by mass %, includes 40% to 95% ferrite and 5% to 60% martensite in area fraction, and optionally further includes 10% or less pearlite in area fraction, 5% or less retained austenite in volume fraction, and less than 40% bainite in area fraction.
Yoshihiro Suwa, Toshiki Nonaka, Koichi Sato, Manabu Naruse, Yasunori Iwasa, Yoshifumi Kobayashi
Filed: 26 Mar 14
Utility
Heat treatment device, heat treatment method, and rail steel
27 Jan 20
An object of the present invention is to provide a heat treatment device, a heat treatment method, and a rail steel which are suitable for preventing the occurrence of brittle fractures which originate in a base portion of a weld of the rail steel.
Kenichi Karimine, Masaharu Ueda, Kenji Saita
Filed: 5 Apr 15