586 patents
Page 9 of 30
Utility
Threaded connection for oil well
12 Oct 21
Keita Inose, Masaaki Sugino, Takashi Okada
Filed: 21 Feb 18
Utility
Threaded connection for steel pipe
12 Oct 21
A threaded connection for steel pipe with improved sealability against the internal and external pressures is provided.
Yousuke Oku, Masaaki Sugino
Filed: 6 Nov 18
Utility
Grain-oriented electrical steel sheet
12 Oct 21
A grain-oriented electrical steel sheet includes: a steel sheet; an oxide layer including SiO2 that is formed on the steel sheet; and a tension-insulation coating that is formed on the oxide layer, in which the steel sheet includes, as a chemical composition, by mass %, C: 0.085% or less, Si: 0.80% to 7.00%, Mn: 1.00% or less, acid-soluble Al: 0.065% or less, S: 0.013% or less, Cu: 0% to 0.80%, N: 0% to 0.012%, P: 0% to 0.50%, Ni: 0% to 1.00%, Sn: 0% to 0.30%, Sb: 0% to 0.30%, and a remainder of Fe and impurities, the tension-insulation coating includes a chromium compound, and the Fe content in the oxide layer and the tension-insulation coating is 70 mg/m2 to 250 mg/m2.
Shinsuke Takatani, Shunsuke Okumura, Shohji Nagano, Takashi Kataoka
Filed: 13 Jul 18
Utility
Method and apparatus for producing pressed component
5 Oct 21
A method or apparatus to produce an L-shaped pressed component includes, where a portion of a blank, having tensile strength of 1180 MPa or more, is held in a state of being clamped by a blank holder and a die, and a portion of the blank, to be formed into a top plate is held in a state of being clamped by a pad and a punch; the second step where a vertical wall, a concave ridge and a flange on the inner side of a curved portion are formed by, bend forming with a bending die, forming one, two or more material inflow promoting portion; and the third step where the die is moved in a direction toward a side where the blank holder is disposed to form a vertical wall, a concave ridge, and a flange on the outer side of the curved portion by draw forming.
Yasuharu Tanaka, Toshimitsu Aso, Takashi Miyagi, Misao Ogawa, Shinobu Yamamoto, Keita Ikegami
Filed: 26 Jun 17
Utility
Impact absorption member
5 Oct 21
Toshiya Suzuki, Yoshiaki Nakazawa, Yasuhiro Ito, Satoshi Shirakami
Filed: 26 Jul 17
Utility
Method for extracting metal compound particles, method for analyzing the metal compound particles, and electrolytic solution used therefor
5 Oct 21
Kazumi Mizukami
Filed: 17 Feb 17
Utility
Method for estimating hardness of cold worked component and method for acquiring hardness-equivalent plastic strain curve of steel material
28 Sep 21
There is provided a method for estimating a hardness of a cold worked component including: preparing a test piece for hardness measurement having a dent portion of a shape corresponding to a shape of the contact surface of the punch by using a mounting base on which a test piece is mounted and a punch of which a contact surface to be in contact with the test piece is a curved surface, and compressing the test piece mounted on the mounting base using the punch; measuring hardnesses of the test piece for hardness measurement at a plurality of hardness measurement positions in a measurement direction while taking, as the measurement direction, a direction in the dent portion in which a sheet thickness changes; performing numerical analysis to calculate equivalent plastic strains of the test piece for hardness measurement, and acquiring a hardness-equivalent plastic strain curve on the basis of the hardnesses and the equivalent plastic strains at the hardness measurement positions; and specifying a hardness from the calculated value of equivalent plastic strain of an arbitrary part of the cold worked component on the basis of the hardness-equivalent plastic strain curve by performing numerical analysis to calculate a value of equivalent plastic strain of a cold worked component.
Mitsuharu Yamagata, Nobuo Yoshikawa, Yasushi Tsukano
Filed: 15 Mar 18
Utility
Surface-treated steel sheet part having cut end surface, and cutting method therefor
21 Sep 21
In this part that includes a cut end surface consisting of a surface-treated steel sheet that has been cut, the shape of the cut end surface is such that the length of a first shear droop occurring in the sheet thickness direction is at least 0.10 times the sheet thickness of the surface-treated steel sheet, and the length of a second sheer droop occurring in the planar direction is at least 0.45 times the sheet thickness of the surface-treated steel sheet.
Hirokazu Sasaki, Naofumi Nakamura, Yudai Yamamoto
Filed: 25 Jun 19
Utility
Non-oriented electrical steel sheet and method for manufacturing non-oriented electrical steel sheet
21 Sep 21
This non-oriented electrical steel sheet including, as a chemical composition, by mass %: C: 0.0100% or less; Si: more than 3.0% and 5.0% or less; Mn: 0.1 to 3.0%; P: 0.20% or less: S: 0.0018% or less: N: 0.0040% or less; Al: 0 to 0.9%; one or more selected from the group consisting of Sn and Sb: 0 to 0.100%; Cr 0 to 5.0%; Ni: 0 to 5.0%; Cu: 0 to 5.0%; Ca: 0 to 0.01%; rare earth elements (REM): 0 to 0.010%; and a remainder including Fe and impurities, in which an area ratio of a crystal structure A composed of crystal grains having a grain size of 100 μm or greater in a cross section parallel to a rolled surface of the non-oriented electrical steel sheet is 1 to 30%, an average grain size of a crystal structure B that is a crystal structure other than the crystal structure A is 25 μm or less, and a Vickers hardness HvA of the crystal structure A and a Vickers hardness HvB of the crystal structure B satisfy HvA/HvB≤1.000.
Hiroshi Fujimura, Takeru Ichie, Yoshiaki Natori, Hiroyoshi Yashiki
Filed: 7 Mar 18
Utility
Threaded tubular connection provided with a metallic coating on the threading and on the sealing surface
21 Sep 21
A threaded tubular connection for drilling or operating hydrocarbon wells contains a portion of a tubular element with a male end having an axis of revolution and provided with a first threading extending about the axis of revolution, the male end portion being complementary with a portion of a tubular element with a female end having an axis of revolution and provided with a second threading extending about the axis of revolution, the male and female end portions being capable of being connected by makeup, each of the male and female end portions further comprising a sealing surface with a metal-metal interference, wherein the threading and the sealing surfaces of the male and female end portions are coated with a metallic anti-corrosion and anti-galling layer wherein zinc (Zn) is the major element by weight.
Arnaud Verleene, Nicolas Baudin, Cedric Vogt, Adil Jaafar
Filed: 21 Apr 16
Utility
Microswitch and electronic device in which same is used
21 Sep 21
Hiroshi Kajiro, Toru Nagai, Kentaro Kinoshita
Filed: 20 Jan 17
Utility
Automotive framework member
14 Sep 21
An automotive framework member 1 includes a first steel sheet 10, a second steel sheet 20, and a first weld metal part 40 joining an interface between the first steel sheet 10 and the second steel sheet 20, in which tensile strength of the first steel sheet 10 is 1.0 GPa or more and 1.6 GPa or less, tensile strength of the second steel sheet 20 is 1.8 GPa or more and 2.5 GPa or less, the first steel sheet 10 includes a groove part 18, the second steel sheet 20 is overlapped with the groove part 18, and a minimum Vickers hardness of a region within 4 mm of a periphery of the first weld metal part 40 of the second steel sheet 20 is 80% or more of a hardness of an outside of the region of the second steel sheet 20.
Yasuhiro Ito, Hiroki Fujimoto
Filed: 30 Oct 19
Utility
Watch part
14 Sep 21
A watch part containing a titanium alloy, the titanium alloy, in mass %, includes: Al: 1.0 to 3.5%; Fe: 0.1 to 0.4%; O: 0.00 to 0.15%; C: 0.00 to 0.10%; Sn: 0.00 to 0.20%; Si: 0.00 to 0.15%; and the balance: Ti and impurities, an average grain diameter of α phase crystal grains is 15.0 μm or less, an average aspect ratio of the α phase crystal grains is 1.0 or more and 3.0 or less, and a coefficient of variation of a number density of β-phase crystal grains distributed in the α phase is 0.30 or less.
Genki Tsukamoto, Kazuhiro Takahashi, Hideto Seto, Naoki Okamura, Junichi Sato
Filed: 28 Aug 18
Utility
Rolled wire rod for spring steel
14 Sep 21
A rolled wire rod for spring steel contains, as a chemical composition, by mass %: C: 0.42% to 0.60%; Si: 0.90% to 3.00%; Mn: 0.10% to 1.50%; Cr: 0.10% to 1.50%; B: 0.0010% to 0.0060%; N: 0.0010% to 0.0070%; Mo: 0% to 1.00%; V: 0% to 1.00%; Ni: 0% to 1.00%; Cu: 0% to 0.50%; Al: 0% to 0.100%; Ti: 0% to 0.100%; Nb: 0% to 0.100%; P: limited to less than 0.020%; S: limited to less than 0.020%; and a remainder including Fe and impurities, the carbon equivalent (Ceq) is 0.75% to 1.00%, the area fraction of tempered martensite and bainite included in a microstructure is 90% or greater, the tensile strength is 1,350 MPa or less, and the reduction of area is 40% or greater.
Takahisa Suzuki, Yutaka Neishi, Shuji Kozawa
Filed: 15 Jun 18
Utility
Galvannealed steel sheet
14 Sep 21
A steel sheet includes a hot-dip galvanized layer or a galvannealed layer on a surface of the steel sheet, the steel sheet including: in mass %, C: 0.06% or more and 0.22% or less; Si: 0.50% or more and 2.00% or less; Mn: 1.50% or more and 2.80% or less; Al: 0.02% or more and 1.00% or less; P: 0.001% or more and 0.100% or less; S: 0.0005% or more and 0.0100% or less; N: 0.0005% or more and 0.0100% or less; and a balance: Fe and impurities.
Kohichi Sano, Hiroyuki Kawata, Yuji Yamaguchi, Satoshi Uchida, Yoshinori Imai, Riki Okamoto
Filed: 30 Mar 18
Utility
Non-oriented electrical steel sheet
7 Sep 21
A non-oriented electrical steel sheet including, as a chemical composition, by mass %: C: 0.0030 % or less; Si: 2.00 % to 4.00 %; Al: 0.01 % to 3.00 %; Mn: 0.10 % to 2.00 %; P: 0.005 % to 0.200 %; S: 0.0030 % or less; Cu: more than 1.0 % and 3.0 % or less; Ni: 0.10 % to 3.0 %; one or more coarse precipitate forming element: more than 0.0005 % and 0.0100 % or less in total; a parameter Q (Q=[Si] +2 [Al] [Mn]) is 2.00 or more; Sn: 0.00 % to 0.40 %; Cr: 0.0 % to 10.0 %, and a remainder: Fe and impurities, wherein a number of Cu particles having a diameter of less than 100 nm is 5 or more per 10 μm2, a {100} crystal orientation intensity is 2.4 or more, a thickness is 0.10 mm to 0.60 mm, and an average grain size is 70 μm to 200 μm.
Tesshu Murakawa, Hiroshi Fujimura, Satoshi Kano
Filed: 25 Mar 19
Utility
Railway wheel
7 Sep 21
To provide a railway wheel which is excellent in corrosion fatigue resistance.
Manabu Kubota
Filed: 28 Feb 17
Utility
Non-heat treated steel bar
7 Sep 21
Yusuke Miyakoshi, Motoki Takasuga
Filed: 23 Feb 18
Utility
Steel for cold forging and manufacturing method thereof
7 Sep 21
A steel for cold forging has a predetermined chemical composition, satisfies d+3σ≤10.0 and SA/SB<0.30, includes 1200/mm2 or more of sulfides having an equivalent circle diameter of 1.0 to 10.0 μm in a microstructure, and has an average distance between the sulfides of less than 30.0 μm.
Akira Shiga, Manabu Kubota, Hajime Hasegawa
Filed: 30 Sep 16
Utility
Ferritic stainless steel sheet, hot coil, and automobile exhaust flange member
7 Sep 21
A ferritic stainless steel plate having a sheet thickness t of 5.0 to 12.0 mm, including a chemical composition consisting of, in mass percent, C: 0.001 to 0.010%, Si: 0.01 to 1.0%, Mn: 0.01 to 1.0%, P: 0.04% or less, S: 0.010% or less, Cr: 10.0 to 20.0%, Ni: 0.01 to 1.0%, Ti: 0.10 to 0.30%, V: 0.01 to 0.40%, Al: 0.005 to 0.3%, N: 0.001 to 0.02%, and as necessary, one or more of B, Mo, Cu, Mg, Sn, Sb, Zr, Ta, Nb, Hf, W, Co, Ca, REM, and Ga, with the balance being Fe and unavoidable impurities, wherein in a steel micro-structure, on a cross section parallel to a rolling direction, an area ratio of structures each satisfying: major grain diameter/minor grain diameter being less than 5.0 is 90% or more, and an average minor grain diameter of the structures is 55 μm or less.
Shinichi Teraoka, Shinichi Tamura, Akihiro Nishimura
Filed: 28 Feb 17