586 patents
Page 14 of 30
Utility
Blank, forming plate, press formed article manufacturing method, and press formed article
16 Mar 21
A blank that is a material for an elongated press formed article having a substantially hat shaped lateral cross-section profile including a top plate section, a ridge line section, a flange section, and vertical wall section, and configured with a first portion in which the top plate section has a fixed width, and a second portion including a curved portion in which the top plate section exhibits an L-shape in plan view due to the vertical wall section, the ridge line section, and the flange section curving along with the width of the top plate section gradually increasing.
Takashi Miyagi, Kei Misawa, Yasuharu Tanaka, Misao Ogawa, Toshimitsu Aso
Filed: 13 May 14
Utility
Steel sheet for carburizing, and method for manufacturing steel sheet for carburizing
2 Mar 21
Yuri Toda, Kazuo Hikida, Motonori Hashimoto
Filed: 30 Aug 18
Utility
Pressing machine and a method for manufacturing a press-formed product
2 Mar 21
A method for manufacturing a press-formed product includes a first step and a second step.
Yasuhiro Ito
Filed: 25 Jan 17
Utility
Method of resistance spot welding
2 Mar 21
A resistance spot welding method able to form a welded joint having delayed fracture resistance, includes, in order, applying a pressing force P1 (kN) to the plurality of steel sheets by welding electrodes while supplying a supplied current I1 (kA), while applying the pressing force P1, supplying a current Ic (kA) during a cooling time tc (s), repeating two times or more a pressure force raising and lowering cycle of supplying a supplied current I2 (kA) to the welding electrodes while applying a pressing force P2 (kN) to the plurality of steel sheets by the welding electrodes during a pressing time tf (s), then immediately applying a pressing force P3 (kN) during a pressing time ti (s), applying the pressing force P2 during the pressing time tf, and releasing the pressing force and ending the supply of current, satisfying 0≤Ic<I1, 0.3≤I2/I1<1.0, P2/P1≥2, tf≤0.2, P3<P2, and ti≤0.2.
Seiji Furusako
Filed: 21 Oct 16
Utility
Hot-dip galvanized steel sheet and manufacturing method thereof
23 Feb 21
A hot-dip galvanized steel sheet includes a steel sheet and a hot-dip galvanized layer arranged on the steel sheet, in which the Si content and the Al content by mass % of components of the steel sheet satisfy a relationship 0.5<Si+Al<1.0, and a metallographic structure of the steel sheet satisfies a relationship of {(n2)2/3×d2}/{(n1)2/3×d1}×ln(H2/H1)<0.3 when the n1 is the number of a MnS of a surface portion of the steel sheet, the d1 μm is an average equivalent circle diameter of the MnS in the surface portion of the steel sheet, the H1 GPa is a hardness of a martensite of the surface portion of the steel sheet, the n2 is the number of the MnS of a center portion of the steel sheet, the d2 μm is an average equivalent circle diameter of the MnS in the center portion of the steel sheet, and the H2 GPa is the hardness of the martensite of the center portion of the steel sheet.
Toshiki Nonaka, Toshio Ogawa, Nobuhiro Fujita
Filed: 18 Mar 19
Utility
Cooling equipment for continuous annealing furnace
23 Feb 21
Cooling equipment comprising: a plurality of injection units in a continuous annealing furnace including heating zone, soaking zone, and cooling zone through which strip-shaped steel sheet is sequentially fed, the injection units arranged in cooling zone in row along feed direction of steel sheet and injecting, from injection nozzles, cooling gas containing hydrogen, onto steel sheet; and hydrogen concentration adjustment unit adjusts hydrogen concentration of cooling gas such that hydrogen concentration distribution is formed in which, in a space of the cooling zone where plurality of injection units are disposed, hydrogen concentration at upstream region is higher than hydrogen concentration at downstream region; plurality of injection nozzles arranged along feed direction of steel sheet, and each of injection nozzles extending toward steel sheet; and injection nozzles positioned at both sides in array direction inclined to slope toward a center of the array direction on progression toward tips of injection nozzles.
Hirohisa Kawamura
Filed: 5 Apr 16
Utility
Titanium composite material and titanium material for hot rolling
16 Feb 21
A titanium composite material 1 is provided that includes: an inner layer 5 consisting of a commercially pure titanium or a titanium alloy; an outer layer 3 formed on at least one surface of the inner layer 5 and having a chemical composition that is different from a chemical composition of the inner layer 5; and an intermediate layer formed between the inner layer 5 and the outer layer 3 and having a chemical composition that is different from the chemical composition of the inner layer 5.
Yoshitsugu Tatsuzawa, Tomonori Kunieda, Koji Mitsuda, Kenichi Mori, Kazuhiro Takahashi, Hideki Fujii, Tomoyuki Kitaura
Filed: 29 Jul 16
Utility
Zn—Al—Mg-based plated steel sheet
9 Feb 21
A Zn—Al—Mg-based plated steel sheet has, an alloy layer formed on a surface of a steel sheet and contains Fe and Si, and a plated layer formed on a surface of the alloy layer opposite to the steel sheet, in which the plated layer and the alloy layer include, in mass %, Al: 45.0 to 65.0%, Si: 0.50 to 5.00%, Mg: 1.00 to 10.00%, and a balance of Zn, Fe, and impurities, the plated layer contains 0.1 to 20.0% of a Mg—Si phase in terms of volume fraction, an average equivalent circle diameter of the Mg—Si phase in the surface layer area is 0.1 to 15.0 μm, and an integrated value of a Si content from the surface to thickness center of the plated layer is 0.55 times or more of an integrated value of the Si content from the surface to an interface.
Nobuyuki Shimoda
Filed: 8 Sep 17
Utility
Break prediction method, break prediction device, program, recording medium, and break discernment standard calculation method
9 Feb 21
A break prediction method according to the present invention predicts a break of a joint portion of an object to be analyzed including a pair of members joined to each other by using a finite element method, and includes a first step of acquiring at least an element size of a base material portion, from among parameters set in an element model for the object to be analyzed; a second step of calculating, as a break discernment standard, a break limit moment defined by a function including the element size of the base material portion as a variable; and a third step of discerning whether the moment applied to the joint portion in a deformation analysis of the element model for the object to be analyzed exceeds the break limit moment, and outputting the result of the discernment as a break prediction result for the joint portion.
Takahiro Aitoh, Yoshiyuki Kaseda, Yusuke Tsunemi
Filed: 17 Feb 16
Utility
Steel cord and method for producing the same
9 Feb 21
There is provided a steel cord including a steel wire and a plating layer that covers the steel wire and has Cu, Zn, and Co, wherein Cu and Zn are alloyed and a region covered with Co and a region not covered with Co are mixed on the outermost surface of the plating layer.
Tetsuya Nakajima, Kenichi Yamashita, Takashi Tokuyama, Shinei Takamura, Masumi Suzuki, Koji Fujisawa, Junichi Kodama
Filed: 13 Oct 16
Utility
Drawn body for vehicle structural member, manufacturing method for drawn body for vehicle structural member, and manufacturing apparatus for drawn body for vehicle structural member
9 Feb 21
A drawn body for a vehicle structural member has a tensile strength of 980 MPa or more, radii of curvature of two first convex ridge portions, a second convex ridge portion, and a concave ridge portion are each 30 mm or less, a corner radius of a corner wall is 30 mm or less, and a forming depth which is a separation distance between a top sheet portion and an outwardly-extending flange is 40 mm or more.
Kenichiro Otsuka, Takashi Miyagi
Filed: 16 Jun 17
Utility
Titanium material for hot rolling
9 Feb 21
A titanium material for hot rolling 1 includes a titanium cast piece 3, and titanium sheets 4 that are welded to faces corresponding to rolling surfaces 3a of the titanium cast piece 3.
Tomonori Kunieda, Yoshitsugu Tatsuzawa, Hideki Fujii
Filed: 29 Jul 16
Utility
Coated metal sheet for automobile excellent in rust resistance in low temperature running environments
9 Feb 21
Provided is a coated metal sheet for automobile comprising: a metal sheet; and a coating film (α) present on at least one surface of the metal sheet.
Kensei Yuasa, Yoichiro Mori, Yusuke Wada, Mitsutaka Nambo
Filed: 30 Sep 15
Utility
Sn-plated steel sheet
9 Feb 21
The Sn-plated steel sheet of the disclosure is an Sn-plated steel sheet including: a steel sheet; an Sn plating layer formed on at least one side of the steel sheet and containing, based on % by mass, from 0.1 g/m2 to 15 g/m2 of metal Sn; and a coating layer formed on the surface of the Sn plating layer and containing zirconium oxide and tin oxide; in which the content of the zirconium oxide in the coating layer is from 0.2 mg/m2 to 50 mg/m2 in terms of metal Zr amount, and the peak position of binding energy of Sn3d5/2 according to X-ray photoelectron spectroscopy of the tin oxide in the coating layer is 1.6 eV or higher than the peak position of binding energy of the metal Sn.
Shintaro Yamanaka, Shigeru Hirano, Morio Yanagihara, Hirokazu Yokoya
Filed: 24 May 17
Utility
Hot-rolled steel sheet
9 Feb 21
A hot-rolled steel sheet includes a predetermined chemical composition, and a structure which include, by area ratio, ferrite and bainite in a range of 80% to 98% in total, and martensite in a range of 2% to 10%, in which in the structure, in a case where a boundary having an orientation difference of equal to or greater than 15° is defined as a grain boundary, and an area which is surrounded by the grain boundary, and has an equivalent circle diameter of equal to or greater than 0.3 μm is defined as a grain, the ratio of the grains having an intragranular orientation difference in a range of 5° to 14° is, by area ratio, in a range of 10% to 60%.
Hiroshi Shuto, Natsuko Sugiura, Mitsuru Yoshida, Tatsuo Yokoi, Masayuki Wakita
Filed: 22 Feb 16
Utility
Cold rolled steel sheet for drawn can and method for manufacturing same
2 Feb 21
A steel sheet for a drawn can has a predetermined chemical composition and has a ferrite single-phase structure with a crystal grain size number of 11.0 or more, the sheet thickness is 0.15 to 0.50 mm, in an L direction of the steel sheet after an ageing treatment at 100° C. for one hour, an yield strength YP is 220 to 290 MPa, a tensile strength TS is 330 to 390 MPa, a total elongation EL is 32% or more, an yield point elongation YP-EL is 0%, an average plastic strain ratio rm is more than 1.35, and an in-plane anisotropy Δr is −0.30 to +0.15.
Masaharu Oka, Nobusato Kojima, Yuta Dairokuno, Michihiro Nono
Filed: 19 Apr 18
Utility
Grain-oriented electrical steel sheet
2 Feb 21
Provided is a grain-oriented electrical steel sheet including a steel sheet having a steel sheet surface in which a groove, which extends in a direction intersecting a rolling direction and of which a groove depth direction matches a sheet thickness direction, is formed.
Hideyuki Hamamura, Tatsuhiko Sakai, Hisashi Mogi, Fumiaki Takahashi, Hirofumi Imai, Shunsuke Okumura
Filed: 19 Apr 16
Utility
Grain-oriented electrical steel sheet and decarburized steel sheet used for manufacturing the same
2 Feb 21
A grain-oriented electrical steel sheet includes: a chemical composition represented by, in mass %, Si: 1.8% to 7.0%, Cu: 0.03% to 0.60%, and the balance: Fe and impurities; and a primary coating film containing forsterite on a surface of the steel sheet, in which a Cu/Fe light-emitting intensity ratio at an interface region between the primary coating film and the surface of the steel sheet is 0.30 or less.
Hiroshi Fujimura, Fumiaki Takahashi, Takashi Kataoka
Filed: 26 Oct 16
Utility
Steel sheet
2 Feb 21
A steel sheet according to an aspect of the present invention has a chemical composition within a predetermined range; in which a metallographic structure at a thickness ¼ portion includes, by unit area %, ferrite: 10% or more and less than 50%, granular bainite: 5% or more and less than 50%, and martensite: 20% or more and less than 60%; in the metallographic structure at the thickness ¼ portion, a total of upper bainite, lower bainite, residual austenite, and pearlite is 0% or more and less than 15% by unit area %; at the thickness ¼ portion, a product of an area ratio Vm of the martensite and an average hardness Hv of the martensite is 12,000 to 34,000; and a tensile strength is 980 MPa or higher.
Yuri Toda, Kunio Hayashi, Katsuya Nakano, Hiroyuki Kawata, Akihiro Uenishi
Filed: 13 Sep 16
Utility
Hot rolled steel sheet
26 Jan 21
A hot rolled steel sheet having a chemical composition consisting of, in mass %, C: 0.020-0.180%, Si: 0.05-1.70%, Mn: 0.50-2.50%, Al: 0.010-1.000%, N: 0.0060%, P≤0.050%, S≤0.005%, Ti: 0-0.150%, Nb: 0-0.100%, V: 0-0.300%, Cu: 0-2.00%, Ni: 0-2.00%, Cr: 0-2.00%, Mo: 0-1.00%, B: 0-0.0100%, Mg: 0-0.0100%, Ca: 0-0.0100%, REM: 0-0.1000%, Zr: 0-1.000%, Co: 0-1.000%, Zn: 0-1.000%, W: 0-1.000%, the balance: Fe and impurities, wherein a metal microstructure includes, in area %, at a position ¼ W or ¾ W from an end face of the steel sheet and ¼ t or ¾ t from a surface, martensite: more than 2%-10%, retained austenite <2%, bainite 40%, pearlite 2%, the balance: ferrite, an average circle-equivalent diameter of a metallic phase constituted of martensite/retained austenite is 1.0-5.0 μm, an average of minimum distances between adjacent metallic phases is 3 μm or more, and a standard deviation of nano hardness is 2.0 GPa or less.
Tatsuo Yokoi, Nobuo Yoshikawa, Shigeru Yonemura, Kazuya Ootsuka
Filed: 31 Mar 17