586 patents
Page 3 of 30
Utility
Overlapped blank for hot stamping, method of manufacturing overlapped hot stamp molded body, and overlapped hot stamp molded body
21 Jun 22
To solve the problem about the difference in temperature increasing rate between an overlapped part and a one-sheet part so as to further improve the corrosion resistance of plating after hot stamping.
Soshi Fujita, Yuki Suzuki, Masahiro Fuda, Jun Maki, Hideaki Irikawa, Masahiro Nakata
Filed: 5 Apr 19
Utility
Steel sheet
21 Jun 22
A steel sheet includes a predetermined chemical composition, and includes a steel microstructure represented by, in an area ratio, ferrite: 5% to 80%, a hard microstructure constituted of bainite, martensite or retained austenite or an arbitrary combination of the above: 20% to 95%, and a standard deviation of a line fraction of the hard microstructure on a line in a plane perpendicular to a thickness direction: 0.050 or less in a depth range where a depth from a surface when a thickness of a steel sheet is set as t is from 3t/8 to t/2.
Shohei Yabu, Akihiro Uenishi, Koutarou Hayashi
Filed: 8 Aug 17
Utility
Electroplating apparatus
21 Jun 22
An electroplating apparatus is provided that minimizes unplated regions when an alloy plating layer is provided on the surface of a thread on a steel pipe.
Masanari Kimoto, Kazuya Ishii, Masahiro Oshima
Filed: 18 Jun 20
Utility
Method for producing titanium foil or titanium sheet, and cathode electrode
14 Jun 22
A titanium foil or a titanium sheet is produced by electrodeposition from molten salt using constant current pulse, the method comprising: forming an electrodeposited titanium film on a surface of a cathode electrode made of glassy carbon, graphite, Mo, and Ni, and separating thereafter the electrodeposited titanium film from the cathode electrode by performing one or both of applying an external force to the electrodeposited titanium film and removing the cathode electrode.
Tetsuya Uda, Kouhei Funatsu, Akihiro Kishimoto, Kenichi Mori, Hideki Fujii
Filed: 1 Mar 18
Utility
Device for controlling flow in mold and method for controlling flow in mold in thin-slab casting
14 Jun 22
Hiroshi Harada, Keita Ikeda, Masashi Sakamoto, Yui Ito, Takuya Takayama
Filed: 7 Jun 19
Utility
Method for producing press-formed product
14 Jun 22
A method for producing a press-formed product includes a first pressing step and a second pressing step.
Junki Natori, Yoshiaki Nakazawa, Ryuichi Nishimura, Keiji Ogawa
Filed: 3 Apr 17
Utility
Hold device
7 Jun 22
A hold device is attached to press tooling.
Kazunori Oooka, Toshimitsu Aso, Hiroshi Yoshida, Daisuke Yasufuku, Yasuharu Tanaka, Takashi Miyagi, Junichiro Suzuki, Shinobu Yamamoto
Filed: 6 Dec 18
Utility
Automobile suspension part
7 Jun 22
An automobile suspension part includes an arm member and a reinforcement, wherein: the arm member includes a top wall part, a first ridge line part, a second ridge line part, a first side wall part, and a second side wall part; the top wall part includes a first attachment part at a first end part; the top wall part includes a second attachment part at a second end part; the reinforcement includes a bottom wall part, a third ridge line part, and a flange part; the third ridge line part is sandwiched between the bottom wall part and the flange part; the bottom wall part is joined to the first side wall part and the second side wall part; the third ridge line part is connected to the first side wall part and the second side wall part; the flange part is joined to the top wall part between the first attachment part and the second attachment part; and the flange part is connected to the first side wall part and the second side wall part.
Soma Sonobe
Filed: 26 Dec 19
Utility
Surface-treated steel sheet and method for manufacturing surface-treated steel sheet
7 Jun 22
A surface-treated steel sheet of the present invention includes a base steel sheet and a Ni—Co—Fe alloy-plated layer on at least one surface of the base steel sheet, in which, in the alloy-plated layer, a Ni coating weight is 7.1 to 18.5 g/m2, a Co coating weight is 0.65 to 3.6 g/m2, and a total of the Ni coating weight and the Co coating weight is in a range of 9.0 to 20.0 g/m2.
Takehiro Takahashi, Mamoru Saito, Kiyokazu Ishizuka, Yasuto Goto
Filed: 5 Jul 19
Utility
Steel member, steel sheet, and methods for manufacturing same
7 Jun 22
The present invention has as its object the provision of a steel member and steel sheet having high tensile strength and toughness and excellent in hydrogen embrittlement resistance in a corrosive environment and methods for manufacturing the same.
Shinichiro Tabata, Kazuhisa Kusumi, Kazuo Hikida, Hideaki Irikawa
Filed: 5 Feb 20
Utility
Piercing machine, mandrel bar, and method for producing seamless metal pipe using the same
31 May 22
A mandrel bar of a piercing machine includes: a bar body; a coolant channel formed inside the bar body and through which a coolant flows; an inner surface cooling mechanism which is disposed in a cooling zone and is connected to the coolant channel and which, during piercing-rolling or during elongating rolling, ejects the coolant to outside of the bar body to cool an inner surface portion of a hollow shell inside the cooling zone; and an inner surface damming mechanism which is disposed adjacent to the cooling zone on a rearward side of the cooling zone and which, during piercing-rolling or during elongating rolling, suppresses the coolant that is ejected to outside of the bar body from contacting the inner surface portion of the hollow shell that is positioned rearward of the cooling zone.
Haruka Obe, Akihiro Sakamoto, Yasuhiko Daimon
Filed: 28 Nov 18
Utility
Control device, control method, and program for controlling continuous casting process
31 May 22
A control device for continuous casting continuously producing a slab by injecting a molten metal from a nozzle to a mold and extracting the molten metal while solidifying the molten metal, includes a molten metal level meter measuring a molten metal level in the mold, a main control unit obtaining an operation amount of a flow rate adjusting mechanism that adjusts a flow rate of a molten metal injected to the mold from the nozzle such that a molten metal level measured by the molten metal level meter follows a molten metal level target value, a flowmeter measuring the flow rate of the molten metal injected to the mold from the nozzle, an input disturbance correction unit obtaining a first correction amount for the operation amount of the flow rate adjusting mechanism obtained by the main control unit.
Hiroki Yamamoto
Filed: 17 Sep 19
Utility
Overlapping bonded structure
31 May 22
The present invention provides an overlapping bonded structure in which breaking of a bonded section at holes formed during bonding can be prevented when an overlapping section formed by overlapping a plurality of meal plate members is bonded by means of a mechanical bonding means or a friction stir spot-welding means.
Hiroki Fujimoto
Filed: 31 Oct 18
Utility
Shaft part
31 May 22
A shaft part excellent in static torsional strength and torsional fatigue strength containing, by mass %, essential elements of C: 0.35 to 0.70%, Si: 0.01 to 0.40%, Mn: 0.5 to 2.6%, P: 0.050% or less, S: 0.005 to 0.020%, Al: 0.010 to 0.050%, N: 0.005 to 0.025%, and O: 0.003% or less, further containing optional elements, having a balance of Fe and impurities, having a chemical composition satisfying formula (1), having at least one hole at an outer circumferential surface, having a volume ratio (R1) of 4 to 20% of retained austenite at a position of a 2 mm depth from the outer circumferential surface, having a volume ratio of retained austenite at a position of a 2 mm depth from the outer circumferential surface in an axial direction of the hole and at a position of a 20 μm depth from the surface of the hole as R2, and having a reduction rate Δγ of 40% or more of retained austenite found by the formula (A): Δγ=[(R1−R2)/R1]×100: Formula (1): 15.0≤25.9C+6.35Mn+2.88Cr+3.09Mo+2.73Ni≤27.2 (Notations of elements in formula are contents of the elements).
Tatsuya Iwasaki, Koji Watari, Hidekazu Sueno
Filed: 20 Sep 17
Utility
Grain-oriented electrical steel sheet
31 May 22
A grain-oriented electrical steel sheet includes: a base steel sheet; an intermediate layer arranged in contact with the base steel sheet; and an insulation coating arranged in contact with the intermediate layer to be an outermost surface, in which the insulation coating has a crystalline phosphide-containing layer containing a crystalline phosphide in an area in contact with the intermediate layer when viewing a cross section whose cutting direction is parallel to a thickness direction.
Seiki Takebayashi, Shuichi Nakamura, Hiroyasu Fujii, Yoshiyuki Ushigami, Shinsuke Takatani
Filed: 13 Jul 18
Utility
Threaded connection for steel pipes
24 May 22
A threaded connection for steel pipes having improved sealing performance is provided.
Keita Inose, Masaaki Sugino
Filed: 5 Apr 18
Utility
Hot-stamped body
24 May 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 5 μm, and is located in an interface between the metallic layer and the steel base metal; and a principal layer that includes coexisting MgZn2 phases and insular FeAl2 phases, is located on the interface layer, and has a thickness of 3 μm to 40 μm.
Kohei Tokuda, Takuya Mitsunobu, Akihiro Sengoku, Kenichiro Matsumura
Filed: 20 Mar 18
Utility
Austenitic stainless steel
24 May 22
A austenitic stainless steel which has a chemical composition consisting of, by mass %, C: 0.04 to 0.12%, Si: 0.25 to 0.55%, Mn: 0.7 to 2.0%, P: 0.035% or less, S: 0.0015% or less, Cu: 0.02 to 0.80%, Co: 0.02 to 0.80%, Ni: 10.0 to 14.0%, Cr: 15.5 to 17.5%, Mo: 1.5 to 2.5%, N: 0.01 to 0.10%, Al: 0.030% or less, O: 0.020% or less, Sn: 0 to 0.01%, Sb: 0 to 0.01%, As: 0 to 0.01%, Bi: 0 to 0.01%, V: 0 to 0.10%, Nb: 0 to 0.10%, Ti: 0 to 0.10%, W: 0 to 0.50%, B: 0 to 0.005%, Ca: 0 to 0.010%, Mg: 0 to 0.010% and REM: 0 to 0.10%, with the balance being Fe and impurities, and satisfying [18.0≤Cr+Mo+1.5×Si≤20.0] and [14.5≤Ni+30×(C+N)+0.5×(Mn+Cu+Co)≤19.5].
Hiroyuki Hirata, Katsuki Tanaka, Kana Jotoku
Filed: 3 Oct 18
Utility
Austenitic stainless steel weld metal and welded structure
24 May 22
A austenitic stainless steel weld metal which has a chemical composition consisting of, by mass %, C: 0.01 to 0.10%, Si: 0.20 to 0.70%, Mn: 0.8 to 2.5%, P: 0.035% or less, S: 0.0030% or less, Cu: 0.01 to 0.60%, Co: 0.01 to 1.00%, Ni: 8.0 to 12.0%, Cr: 14.5 to 17.5%, Mo: 1.0 to 2.2%, N: 0.02 to 0.10%, Al: 0.030% or less, O: 0.020% or less, Sn: 0 to 0.01%, Sb: 0 to 0.01%, As: 0 to 0.01%, Bi: 0 to 0.01%, V: 0 to 0.10%, Nb: 0 to 0.10%, Ti: 0 to 0.10%, W: 0 to 0.50%, B: 0 to 0.005%, Ca: 0 to 0.010%, Mg: 0 to 0.010% and REM: 0 to 0.10%, with the balance being Fe and impurities, and satisfying [17.5≤Cr+Mo+1.5×Si≤19.5] and [11.0≤Ni+30×(C+N)+0.5×(Mn+Cu+Co)≤17.0].
Hiroyuki Hirata, Katsuki Tanaka, Kana Jotoku
Filed: 3 Oct 18
Utility
Piercer plug and method of manufacturing the same
17 May 22
A piercer plug with increased life and a method of manufacturing it are provided.
Yasuyoshi Hidaka, Yasuto Higashida, Yuichi Yamanari, Yuji Yamamoto, Tatsuya Miyai
Filed: 12 Aug 16