Patents by Inventor Tomohito Kurosaki
Tomohito Kurosaki 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: 20220170142Abstract: An aluminum-alloy material (1) has an Al matrix and second-phase particles dispersed in the Al matrix, wherein the value of a metallographic-structure factor F indicated in Equation (1) below is 0.005 or more. F=A·?·L·exp(B·E)??(1) Therein, in the above-mentioned Equation (1), L is the total [?m/?m2] of the perimeters of the second-phase particles, from among the second-phase particles present in an arbitrary cross section, whose circle-equivalent diameters are 0.2 ?m or more, ? is the dislocation density [?m?2], E is the electrical conductivity [% IACS] at 25° C., A and B are correction coefficients determined in accordance with the chemical composition of the aluminum-alloy material, 0.2×10?15?A?20×10?15, and 0.1?B?1.0.Type: ApplicationFiled: May 21, 2020Publication date: June 2, 2022Inventors: Tomohito KUROSAKI, Hiroki TANAKA, Kotaro KITAWAKI
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Publication number: 20220127702Abstract: An aluminum alloy material contains Mg: 7.0% to 10.0% (% by mass, the same applies hereinafter) and Ca: not more than 0.1%, and the aluminum alloy material contains a remainder constituted by aluminum and an inevitable impurity. The aluminum alloy material has a tensile strength of not less than 300 MPa and less than 500 MPa and an elongation of not less than 20%.Type: ApplicationFiled: October 8, 2020Publication date: April 28, 2022Inventors: Tomohito Kurosaki, Tadashi Minoda, Mitsuhiro Tamaki, Jin-Gyo Kim
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Publication number: 20220127701Abstract: An aluminum alloy material contains Mg: 7.0% to 10.0% (% by mass, the same applies hereinafter) and Ca: not more than 0.1%, and the aluminum alloy material contains a remainder constituted by aluminum and an inevitable impurity. The aluminum alloy material has a tensile strength of not less than 500 MPa and an elongation of not less than 3% and less than 10%.Type: ApplicationFiled: October 8, 2020Publication date: April 28, 2022Inventors: Tomohito Kurosaki, Tadashi Minoda, Mitsuhiro Tamaki, Jin-Gyo Kim
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Patent number: 10408550Abstract: There is provided a heat exchanger and a fin material for the heat exchanger that can suppress occurrence of hollow corrosion in a fin and hold cooling performance for a long period of time under a high corrosion environment. The heat exchanger includes an aluminum tube through which a working fluid circulates and an aluminum fin which is bonded to the tube. The fin has a region B around a grain boundary, and a region A around the region B. In the region B, 5.0×104 pieces/mm2 less of Al—Fe—Mn—Si based intermetallic compound, each of which has equivalent circle diameters of 0.1 to 2.5 ?m, are present. In the region A, 5.0×104 pieces/mm2 to 1.0×107 pieces/mm2 of Al—Fe—Mn—Si based intermetallic compound, each of which has equivalent circle diameters of 0.1 to 2.5 ?m, are present.Type: GrantFiled: June 2, 2014Date of Patent: September 10, 2019Assignee: UACJ CorporationInventors: Takashi Murase, Kotaro Kitawaki, Tomohito Kurosaki, Junji Ninomiya
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Publication number: 20190162492Abstract: An aluminum alloy fin material includes an aluminum alloy containing 1.50 to 5.00 mass % Si with the balance of Al and inevitable impurities, and has the function of being bonded by heating with a single layer. Assuming that in a cross section along the thickness direction of the fin material, the equivalent circle diameter of a Si particle is represented by D, a distance from a surface layer to the center of the Si particle is represented by L, the thickness of the fin material is represented by t, and a length parallel to the surface layer is represented by W, all Si particles that are present in the range of the length W and satisfy D?L and L+D>0.04 t also satisfy 0???D2<0.08 tW. An aluminum alloy brazing sheet includes, as a skin material, the fin material that is clad on a core material including an aluminum alloy. A heat exchanger includes the fin material or the brazing sheet that is used in a fin.Type: ApplicationFiled: April 12, 2017Publication date: May 30, 2019Inventors: Tomohito KUROSAKI, Junji NINOMIYA, Yoshihiko MIZUTA, Ryoko FUJIMURA
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Publication number: 20190153576Abstract: To provide an aluminum alloy material having a heat-joining function in monolayer, in which a decrease in deformation resistance caused by working before brazing is suppressed. The present invention is an aluminum alloy material including Si: 1.5 mass % to 5.0 mass %, Mn: 0.05 mass % to 2.0 mass %, Fe: 0.01 mass % to 2.0 mass %, and balance: Al and inevitable impurities and having a heat-joining function in monolayer. The aluminum alloy material has a fibrous structure, the number density of second phase particles including an Si-based compound or an AlMnFeSi-based compound and having an equivalent circle diameter of 5.0 ?m to 10.0 ?m is 1,000/mm2 or less, the work hardening exponent n between two points from a nominal strain that is 0.9 times the nominal strain at maximum load to the nominal strain at maximum load is 0.03 or more, and the local elongation is 1% or more.Type: ApplicationFiled: November 1, 2018Publication date: May 23, 2019Inventor: Tomohito KUROSAKI
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Patent number: 9903008Abstract: Aluminum alloy material containing Si: 1.0 to 5.0 mass % and Fe: 0.01 to 2.0 mass % with balance being Al and inevitable impurities, wherein 250 pcs/mm2 or more to 7×105 pcs/mm2 or less of Si-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 ?m are present in a cross-section of the aluminum alloy material, while 100 pcs/mm2 or more to 7×105 pcs/mm2 or less of Al-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 ?m are present in a cross-section of the aluminum alloy material. An aluminum alloy structure is manufactured by bonding two or more members in vacuum or a non-oxidizing atmosphere at temperature at which a ratio of a mass of a liquid phase generated in the aluminum alloy material to a total mass of the aluminum alloy material is 5% or more and 35% or less.Type: GrantFiled: January 20, 2017Date of Patent: February 27, 2018Assignee: UACJ CorporationInventors: Akio Niikura, Kazuko Fujita, Takashi Murase, Yoshiyuki Oya, Tomohito Kurosaki
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Publication number: 20170137919Abstract: Aluminum alloy material containing Si: 1.0 to 5.0 mass % and Fe: 0.01 to 2.0 mass % with balance being Al and inevitable impurities, wherein 250 pcs/mm2 or more to 7×105 pcs/mm2 or less of Si-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 ?m are present in a cross-section of the aluminum alloy material, while 100 pcs/mm2 or more to 7×105 pcs/mm2 or less of Al-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 ?m are present in a cross-section of the aluminum alloy material. An aluminum alloy structure is manufactured by bonding two or more members in vacuum or a non-oxidizing atmosphere at temperature at which a ratio of a mass of a liquid phase generated in the aluminum alloy material to a total mass of the aluminum alloy material is 5% or more and 35% or less.Type: ApplicationFiled: January 20, 2017Publication date: May 18, 2017Inventors: Akio NIIKURA, Kazuko FUJITA, Takashi MURASE, Yoshiyuki OYA, Tomohito KUROSAKI
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Patent number: 9574253Abstract: An aluminum alloy material contains Si: 1.0 mass % to 5.0 mass % and Fe: 0.01 mass % to 2.0 mass % with balance being Al and inevitable impurities, wherein 250 pcs/mm2 or more to 7×105 pcs/mm2 or less of Si-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 ?m are present in a cross-section of the aluminum alloy material, while 100 pcs/mm2 to 7×105 pcs/mm2 of Al-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 ?m are present in a cross-section of the aluminum alloy material. An aluminum alloy structure is manufactured by bonding two or more members in vacuum or a non-oxidizing atmosphere at temperature at which a ratio of a mass of a liquid phase generated in the aluminum alloy material to a total mass of the aluminum alloy material is 5% or more and 35% or less.Type: GrantFiled: October 1, 2012Date of Patent: February 21, 2017Assignee: UACJ CorporationInventors: Akio Niikura, Kazuko Fujita, Takashi Murase, Yoshiyuki Oya, Tomohito Kurosaki
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Publication number: 20160116234Abstract: There is provided a heat exchanger and a fin material for the heat exchanger that can suppress occurrence of hollow corrosion in a fin and hold cooling performance for a long period of time under a high corrosion environment. The heat exchanger includes an aluminum tube through which a working fluid circulates and an aluminum fin which is bonded to the tube. The fin has a region B around a grain boundary, and a region A around the region B. In the region B, 5.0×104 pieces/mm2 less of Al—Fe—Mn—Si based intermetallic compound, each of which has equivalent circle diameters of 0.1 to 2.5 ?m, are present. In the region A, 5.0×104 pieces/mm2 to 1.0×10? pieces/mm2 of Al—Fe—Mn—Si based intermetallic compound, each of which has equivalent circle diameters of 0.1 to 2.5 ?m, are present.Type: ApplicationFiled: June 2, 2014Publication date: April 28, 2016Applicant: UACJ CorporationInventors: Takashi MURASE, Kotaro KITAWAKI, Tomohito KUROSAKI, Junji NINOMIYA
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Publication number: 20160089860Abstract: This invention provides an aluminum alloy material capable of being thermally bonded in a single layer without using a bonding agent, such as a brazing or welding filler metal. This invention also provides a bonding method for the aluminum alloy material, and an aluminum bonded body using the aluminum alloy material. The aluminum alloy material is made of an aluminum alloy containing Si: 1.0 to 5.0 mass % and Fe: 0.01 to 2.0 mass % with the balance Al and inevitable impurities. The aluminum alloy material contains 10 to 1×104 pieces/?m3 of Al-based intermetallic compounds having equivalent circle diameters of 0.01 to 0.5 ?m and 200 pieces/mm2 or less of Si-based intermetallic compounds having equivalent circle diameters of 5.0 to 10 ?m.Type: ApplicationFiled: May 14, 2013Publication date: March 31, 2016Applicant: UACJ CORPORATIONInventors: Tomohito Kurosaki, Akio Niikura, Kazuko Terayama, Takashi Murase, Yu Matsui, Junichi Mochiduki, Toshio Araki
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Publication number: 20150050520Abstract: An aluminum alloy material contains Si: 1.0 mass % to 5.0 mass % and Fe: 0.01 mass % to 2.0 mass % with balance being Al and inevitable impurities, wherein 250 pcs/mm2 or more to 7×105 pcs/mm2 or less of Si-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 ?m are present in a cross-section of the aluminum alloy material, while 100 pcs/mm2 to 7×105 pcs/mm2 of Al-based intermetallic compound particles having equivalent circle diameters of 0.5 to 5 ?m are present in a cross-section of the aluminum alloy material. An aluminum alloy structure is manufactured by bonding two or more members in vacuum or a non-oxidizing atmosphere at temperature at which a ratio of a mass of a liquid phase generated in the aluminum alloy material to a total mass of the aluminum alloy material is 5% or more and 35% or less.Type: ApplicationFiled: October 1, 2012Publication date: February 19, 2015Inventors: Akio Niikura, Kazuko Fujita, Takashi Murase, Yoshiyuki Oya, Tomohito Kurosaki