Patents by Inventor Katsushi Matsumoto
Katsushi Matsumoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20170233853Abstract: The present invention pertains to an Al—Mg—Si alloy sheet for forming, that contains 0.2-2.0% of Mg, 0.3-2.0% of Si, and 0.005-0.3% of Si (all amounts given with respect to mass), the balance comprising Al and unavoidable impurities, wherein the aluminum alloy sheet for forming is characterized in that the structure of the aluminum alloy sheet is such that the average number density of compounds having a circle-equivalent diameter within a range of 0.3-20 ?m as measured by SEM at 500 times magnification is more than 0/mm2 but not more than 5,000/mm2, and of the compounds measured by SEM, the average count ratio of compounds that contain 0.5% by mass or more of Sn as identified using an X-ray spectrograph, is 0% or more but less than 50%. This aluminum alloy sheet for forming exhibits high BH response and good formability.Type: ApplicationFiled: August 27, 2015Publication date: August 17, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yasuhiro ARUGA, Hisao SHISHIDO, Katsushi MATSUMOTO
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Publication number: 20170204503Abstract: Disclosed are a structural part obtained from a 6000 series aluminum alloy sheet as a shaping raw material and having an improved crash performance; and a method for producing the sheet. For the sheet, a 6000 series aluminum alloy sheet is used which has a specified composition and is produced in the usual way. Even when this sheet is used, strain is given at a high level thereto by a cold work, thereby heightening the average dislocation density of a surface of the resultant structural part, which has been artificially aged. This density is measured by X-ray diffraction. Thus, the structural part is improved in strength and in crash performance, which is estimated in a VDA bending test, when the automobile collides.Type: ApplicationFiled: December 15, 2016Publication date: July 20, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yasuhiro ARUGA, Katsushi MATSUMOTO, Kazufumi SATO
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Publication number: 20170182602Abstract: A laminated aluminum alloy sheet that includes a core material and a sacrificial material being clad on at least one side surface of the core material. The core material contains Mn: from 0.5 to 1.8 mass %, Si: from 0.4 to 1.5 mass % and Cu: from 0.05 to 1.2 mass %, and contains at least one member of Fe: 1.0 mass % or less and Ti: 0.3 mass % or less, with the remainder being Al and unavoidable impurities. The core material has a number density of dispersoids having a particle diameter of 0.01 to 0.5 um of from 20 to 80/um3.Type: ApplicationFiled: March 25, 2015Publication date: June 29, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Katsushi MATSUMOTO, Masao KINEFUCHI, Takahiro IZUMI
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Publication number: 20170173741Abstract: Provided is an aluminium alloy laminated plate having a sacrificial material cladded to at least one side surface of a core material, wherein the core material contains specified amounts of Mn, Si, Cu, Mg, Fe, and Ti, the balance is Al and inevitable impurities, the number density of dispersed particles having a particle size of 0.01-0.5 ?m is 10-100/?m3, and [(the total solid solution amount of Mg, Mn, Si, and Cu)/(the total added amount of Mg, Mn, Si, and Cu)] is 0.10 or more.Type: ApplicationFiled: March 24, 2015Publication date: June 22, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Katsushi MATSUMOTO, Takahiro IZUMI
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Publication number: 20170173742Abstract: Provided are an aluminum alloy clad plate for structural members, and an aluminum alloy clad structural member which have both of a high strength and formability (ductility) and further such a BH response that the plate and the member can gain a required high strength even through a high-temperature and short-period artificial aging. The clad plate is an aluminum alloy clad plate having laminated aluminum alloy layers as illustrated in FIGS. 4 and 5. The clad plate also has mutual diffusion regions in which Mg and Zn are mutually diffused between the laminated aluminum alloy layers as a phase after subjected to diffusion heat treatment, and has an inertial radius Rg and a scattering intensity I0 as shown in FIGS. 1 and 2. The factors Rg and I0 are measured by a small angle X-ray scattering technique.Type: ApplicationFiled: December 16, 2016Publication date: June 22, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Katsushi MATSUMOTO, Yasuhiro ARUGA, Akihiro TSURUNO, Shimpei KIMURA
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Patent number: 9682446Abstract: There are provided a flux cored wire for joining dissimilar materials with each other, capable of enhancing a bonding strength upon joining an aluminum-base material with a steel-base material, and excellent in bonding efficiency, a method for joining the dissimilar materials with each other, and a bonded joint obtained by the method. In particular, there is provided a method for joining dissimilar materials with each other, in the case of melt weld-bonding of high-strength dissimilar materials with each other, that is, the high-strength steel member with the high-strength 6000 series aluminum alloy member and in the case of the steel member being a galvanized steel member. In one mode, use is made of a flux cored wire wherein the interior of an aluminum alloy envelope is filled up with a flux, the flux has fluoride composition containing a given amount of AlF3 without containing chloride, and the aluminum alloy of the envelope contains Si in a range of 1 to 13 mass %.Type: GrantFiled: February 6, 2007Date of Patent: June 20, 2017Assignee: Kobe Steel, Ltd.Inventors: Jun Katoh, Mikako Takeda, Seiji Sasabe, Katsushi Matsumoto, Hidekazu Ido, Tsuyoshi Matsumoto
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Publication number: 20170144411Abstract: Provided are an aluminum alloy clad plate for structural members, and an aluminum alloy clad structural member which have both of a high strength and formability (ductility) and further such a BH response that the plate and the member can gain a required high strength even through a high-temperature and short-period artificial aging. The clad plate is an aluminum alloy clad plate having laminated aluminum alloy layers as illustrated in FIGS. 4 and 5. The clad plate also has mutual diffusion regions in which Mg and Zn are mutually diffused between the laminated aluminum alloy layers as a phase after subjected to diffusion heat treatment, and has an inertial radius Rg and a scattering intensity I0 as shown in FIGS. 1 and 2. The factors Rg and I0 are measured by a small angle X-ray scattering technique.Type: ApplicationFiled: November 18, 2016Publication date: May 25, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Katsushi MATSUMOTO, Kazufumi SATO, Hiroshi OKUDA
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Publication number: 20170145546Abstract: Provided is an aluminum alloy clad sheet that resolves the contradiction between a high strength level and ductility in a single sheet of the existing 7000-series aluminum alloy or the like, and has high strength, good formability (high ductility), and a good BH property through short-time artificial age hardening. An aluminum alloy clad sheet subjected to diffusion heat treatment includes a plurality of aluminum alloy layers being laminated. In the clad sheet, aluminum alloy layers having specific compositions are adjacently laminated such that the contents of Mg or Zn are different from each other, and a microstructure after the diffusion heat treatment has fine grain size and an interdiffusion region of Mg and Zn. In addition, the clad sheet has a specific DSC characteristic. Consequently, high strength and good formability (high ductility) are exhibited, and a BH property through short-time artificial age hardening is improved.Type: ApplicationFiled: November 2, 2016Publication date: May 25, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Kazufumi SATO, Katsushi MATSUMOTO
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Publication number: 20170081749Abstract: Disclosed is a 7xxx-series aluminum alloy sheet that has a specific chemical composition and is produced by a common procedure. The sheet maintains high strength via a good balance between Zn and Mg, while the Zn content is controlled. The average compositional ratio of Zn to Mg in grain-boundary precipitates is controlled in the sheet that is naturally aged after production; and the average compositional ratio of Zn to Mg in intragranular precipitates is controlled in the sheet that is further artificially aged after the natural aging. Thus, the aluminum alloy sheet is allowed to have formability, corrosion resistance, and such high strength as to be demanded of structural components.Type: ApplicationFiled: March 16, 2015Publication date: March 23, 2017Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Katsushi MATSUMOTO, Yasuhiro ARUGA, Hisao SHISHIDO
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Patent number: 9574258Abstract: An aluminum-alloy sheet includes 0.10 to 0.40 mass % of Si, 0.35 to 0.80 mass % of Fe, 0.10 to 0.35 mass % of Cu, 0.20 to 0.80 mass % of Mn, and 1.5 to 2.5 mass % of Mg, the balance being Al and unavoidable impurities, wherein a content ratio (Si/Fe) of the Si to the Fe is 0.75 or less, the area fraction of Mg2Si intermetallic compound grains having a maximum length of 1 ?m or more is 0.10% or more in a region of a section of the aluminum-alloy sheet, the region being a central region in the thickness direction of the aluminum-alloy sheet, and the aluminum-alloy sheet has a proof stress of 225 to 270 N/mm2 after having been baked at 270° C. for 20 seconds.Type: GrantFiled: February 23, 2012Date of Patent: February 21, 2017Assignee: Kobe Steel, Ltd.Inventors: Yuji Inoue, Yasuhiro Aruga, Katsushi Matsumoto, Kiyohito Tsuruda, Kazuharu Masada
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Patent number: 9551065Abstract: Film-formation rate can be increased in the pre-sputtering and in the subsequent sputtering onto a substrate or the like, and sputtering failures such as splashes can be inhibited, by making an Al-based alloy or Cu-based alloy spurting target fulfill the following requirements (1) and/or (2) when the total area ratio of crystal orientations <001>±15°, <011>±15°, <111>±15°, <112>±15°, and <012>±15° in the sputtering surface normal direction in the depth within 1 mm from the uppermost surface of the sputtering target is referred to as a P value: (1) the area ratio PA of <011>±15° to the P value: 40% or lower; and (2) the total area ratio PB of <001>±15° and <111>±15° to the P value: 20% or higher.Type: GrantFiled: December 20, 2011Date of Patent: January 24, 2017Assignees: Kobe Steel, Ltd., KOBELCO RESEARCH INSTITUTE, INC.Inventors: Katsushi Matsumoto, Junichi Nakai, Toshiaki Takagi
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Patent number: 9546411Abstract: An aluminum-alloy sheet includes 0.10 to 0.40 mass % of Si, 0.35 to 0.80 mass % of Fe, 0.10 to 0.35 mass % of Cu, 0.20 to 0.80 mass % of Mn, and 1.5 to 2.5 mass % of Mg, the balance being Al and unavoidable impurities, wherein a content ratio (Si/Fe) of the Si to the Fe is 0.75 or less, the solute Mn content is 0.12 to 0.20 mass %, and the aluminum-alloy sheet has a proof stress of 225 N/mm2 or more after having been baked at 270° C. for 20 seconds.Type: GrantFiled: February 23, 2012Date of Patent: January 17, 2017Assignee: Kobe Steel, Ltd.Inventors: Yuji Inoue, Yasuhiro Aruga, Katsushi Matsumoto, Kiyohito Tsuruda, Kazuharu Masada
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Patent number: 9514856Abstract: Disclosed is a copper alloy containing 1.0% to 3.6% of Ni, 0.2% to 1.0% of Si, 0.05% to 3.0% of Sn, 0.05% to 3.0% of Zn, with the remainder including copper and inevitable impurities. The copper alloy has an average grain size of 25 ?m or less and has a texture having an average area percentage of cube orientation of 20% to 60% and an average total area percentage of brass orientation, S orientation and copper orientation of 20% to 50%. The copper alloy has a KAM value of 0.8 to 3.0 and does not suffer from cracking even when subjected to U-bending. The copper alloy has excellent balance between strengths (particularly yield strength in a direction perpendicular to the rolling direction) and bending workability.Type: GrantFiled: August 4, 2011Date of Patent: December 6, 2016Assignee: Kobe Steel, Ltd.Inventors: Hisao Shishido, Yasuhiro Aruga, Shinya Katsura, Katsushi Matsumoto
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Publication number: 20160305000Abstract: The present invention relates to an Al—Mg—Si-based aluminum alloy plate for molding which contains, in mass %, Mg: 0.3-1.3%, Si: 0.5-1.5% and Sn: 0.005-0.2%, the remainder being Al and unavoidable impurities, wherein when the Sn content in the residue compound separated by a hot phenol residue extraction method and having a particle size exceeding 0.1 ?m is subtracted from the Sn content in the aluminum alloy plate, the resulting difference is a 0.005 mass % or greater quantity of Sn. The aluminum alloy plate for molding combines moldability and BH properties after long-term aging at room temperature.Type: ApplicationFiled: December 8, 2014Publication date: October 20, 2016Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Yasuhiro ARUGA, Hisao SHISHIDO, Katsushi MATSUMOTO
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Patent number: 9453273Abstract: This aluminum alloy sheet is a 6000-series aluminum alloy sheet of a specific composition which, after rolling, has undergone solution hardening and reheating as tempering treatments. The aluminum alloy sheet in differential scanning calorimetry gives a curve in which the exothermic-peak heights A, B, and C in respective specific temperature ranges have relationships within specific given ranges to thereby raise the increase in 0.2% proof stress through low-temperature short-time artificial age-hardening to 100 MPa or more.Type: GrantFiled: January 29, 2013Date of Patent: September 27, 2016Assignee: Kobe Steel, Ltd.Inventors: Katsushi Matsumoto, Yasuhiro Aruga, Hisao Shishido
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Publication number: 20160222491Abstract: A high strength 6000-series aluminum alloy sheet improved with good bendability is provided. Amounts of solute Mg and solute Si are increased in a good balance, on the premise of not greatly changing the composition and the manufacturing condition of the aluminum alloy sheet, thereby promoting formation of Mg—Si clusters in a good balance between the number of Mg and Si atoms to increase the strength after BH without deteriorating the bendability even after natural aging.Type: ApplicationFiled: February 2, 2016Publication date: August 4, 2016Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yasuhiro ARUGA, Hisao Shishido, Katsushi Matsumoto
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Publication number: 20160222492Abstract: A 6000-series aluminum alloy sheet used for structural materials such as structural materials and reinforcing materials increased in the strength without deteriorating bendability is provided. The strength of the Al—Mg—Si alloy sheet after BH is increased without deteriorating the bendability also after natural aging by defining the microstructure such that the content of Mg and Si are balanced so as to satisfy (Mg content)+(Si content)?1.5% and 0.6?(Mg content)/(Si content)?2.0, and an exothermic peak of a predetermined height is present only by one in a temperature range of 230 to 330° C. of a differential scanning calorimeter measurement curve of the sheet shown in FIG. 1.Type: ApplicationFiled: February 2, 2016Publication date: August 4, 2016Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hisao SHISHIDO, Katsushi Matsumoto, Yasuhiro Aruga
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Patent number: 9399808Abstract: This aluminum alloy sheet has increased BH properties under low-temperature short-time-period conditions after long-term room-temperature aging by means of causing aggregates of specific atoms to be contained having a large effect in BH properties, the distance between atoms being no greater than a set distance, and containing either Mg atoms or Si atoms measured by 3D atom probe field ion microscopy in a 6000 aluminum alloy sheet containing a specific amount of Mg and Si.Type: GrantFiled: March 13, 2012Date of Patent: July 26, 2016Assignee: Kobe Steel, Ltd.Inventors: Katsushi Matsumoto, Yasuhiro Aruga, Hidemasa Tsuneishi
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Publication number: 20160208365Abstract: A titanium plate according to the present invention contains a predetermined amount of Fe and O with the remainder consisting of titanium and inevitable impurities, and has a grain microstructure of the ?-phase having a HCP structure. In the titanium plate, the total area in which ?-phase grains specified by a first angle (?) are included is a predetermined value of a ratio (P) or (R) and the total area in which ?-phase grains specified by a second angle (?) are included is a predetermined value of an area ratio (Q) or (S) in a (0001) pole figure of ?-phase grains, and the average value and the maximum value of an equivalent circle diameter in the ?-phase grains are respectively predetermined values.Type: ApplicationFiled: September 19, 2014Publication date: July 21, 2016Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Katsushi MATSUMOTO, Yoshinori ITO
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Publication number: 20160201168Abstract: One of the purposes of the present invention is to provide a 6000-series aluminum alloy plate exhibiting bake hardening (BH) properties and molding properties after aging at room temperature for a long period. In one embodiment of the present invention, in a Sn-containing 6000-series aluminum alloy plate, specific clusters that greatly contribute to the development of the BH properties, which are determined by means of a three-dimensional atom probe field ion microscope, are contained at a predetermined density or more, and the sizes of the atom clusters that meet the aforementioned requirement are uniformed to adjust the average radius of an equivalent circle diameter of each of the clusters to a value falling within a specified range and reduce the standard deviation of the radius of the equivalent circle diameter, whereby the BH properties after aging at room temperature for a long period can be improved.Type: ApplicationFiled: September 4, 2014Publication date: July 14, 2016Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Hisao SHISHIDO, Katsushi MATSUMOTO, Yasuhiro ARUGA