Patents by Inventor Jun Katoh
Jun Katoh 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).
-
Patent number: 10981228Abstract: A high-quality porous aluminum sintered compact, which can be produced efficiently at a low cost; has an excellent dimensional accuracy with a low shrinkage ratio during sintering; and has sufficient strength, and a method of producing the porous aluminum sintered compact are provided. The porous aluminum sintered compact is the porous aluminum sintered compact (10) that includes aluminum substrates (11) sintered to each other. The junction (15), in which the aluminum substrates (11) are bonded to each other, includes the Ti—Al compound (16) and the Mg oxide (17). It is preferable that the pillar-shaped protrusions projecting toward the outside are formed on outer surfaces of the aluminum substrates (11), and the pillar-shaped protrusions include the junction (15).Type: GrantFiled: May 18, 2015Date of Patent: April 20, 2021Assignee: MITSUBISHI MATERIALS CORPORATIONInventors: Ji-bin Yang, Koichi Kita, Toshihiko Saiwai, Koji Hoshino, Jun Katoh
-
Patent number: 10981230Abstract: A high quality porous aluminum body, which has excellent joint strength between the porous aluminum body and the aluminum bulk body, and a method of producing the porous aluminum complex, are provided. The porous aluminum complex (10) includes: a porous aluminum body (30) made of aluminum or aluminum alloy; and an aluminum bulk body (20) made of aluminum or aluminum alloy, the porous aluminum body (30) and the aluminum bulk body (20) being joined to each other. The junction (15) between the porous aluminum body (30) and the aluminum bulk body (20) includes a Ti—Al compound. It is preferable that pillar-shaped protrusions (32) projecting toward the outside are formed on outer surfaces of one of or both of the porous aluminum body (30) and the aluminum bulk body (20), and the pillar-shaped protrusions (32) include the junction (15).Type: GrantFiled: June 1, 2015Date of Patent: April 20, 2021Assignee: MITSUBISHI MATERIALS CORPORATIONInventors: Ji-bin Yang, Koichi Kita, Toshihiko Saiwai, Koji Hoshino, Jun Katoh
-
Patent number: 10532407Abstract: A porous copper sintered material (10) includes: a plurality of copper fibers (11) sintered each other, wherein the copper fibers (11) are made of copper or copper alloy, a diameter R of the copper fibers (11) is in a range of 0.02 mm or more and 1.0 mm or less, and a ratio L/R of a length L of the copper fibers to the diameter R is in a range of 4 or more and 2500 or less (11), redox layers (12) formed by redox treatment are provided on surfaces of copper fibers (11, 11), and concavities and convexities are formed by the redox layer (12), and each of redox layers (12, 12) formed on each of the copper fibers (11) is integrally bonded in a junction of the copper fibers (11).Type: GrantFiled: October 21, 2015Date of Patent: January 14, 2020Assignee: MITSUBISHI MATERIALS CORPORATIONInventors: Koichi Kita, Koji Hoshino, Toshihiko Saiwai, Jun Katoh
-
Patent number: 10478895Abstract: A high-quality porous aluminum sintered compact, which can be produced efficiently at a low cost; has an excellent dimensional accuracy with a low shrinkage ratio during sintering; and has sufficient strength, and a method of producing the porous aluminum sintered compact are provided. The porous aluminum sintered compact is the porous aluminum sintered compact that includes aluminum substrates sintered each other. The junction, in which the aluminum substrates are bonded each other, includes the Ti—Al compound and the eutectic element compound capable of eutectic reaction with Al. It is preferable that the pillar-shaped protrusions projecting toward the outside are formed on outer surfaces of the aluminum substrates, and the pillar-shaped protrusions include the junction.Type: GrantFiled: May 18, 2015Date of Patent: November 19, 2019Assignee: MITSUBISHI MATERIALS CORPORATIONInventors: Ji-Bin Yang, Koichi Kita, Toshihiko Saiwai, Koji Hoshino, Jun Katoh
-
Publication number: 20170274479Abstract: 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: ApplicationFiled: April 28, 2017Publication date: September 28, 2017Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)Inventors: Jun KATOH, Mikako TAKEDA, Seiji SASABE, Katsushi MATSUMOTO, Hidekazu IDO, Tsuyoshi MATSUMOTO
-
Publication number: 20170239729Abstract: A porous copper sintered material (10) includes: a plurality of copper fibers (11) sintered each other, wherein the copper fibers (11) are made of copper or copper alloy, a diameter R of the copper fibers (11) is in a range of 0.02 mm or more and 1.0 mm or less, and a ratio L/R of a length L of the copper fibers to the diameter R is in a range of 4 or more and 2500 or less (11), redox layers (12) formed by redox treatment are provided on surfaces of copper fibers (11, 11), and concavities and convexities are formed by the redox layer (12), and each of redox layers (12, 12) formed on each of the copper fibers (11) is integrally bonded in a junction of the copper fibers (11).Type: ApplicationFiled: October 21, 2015Publication date: August 24, 2017Inventors: Koichi Kita, Koji Hoshino, Toshihiko Saiwai, Jun Katoh
-
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
-
Publication number: 20170043401Abstract: A high quality porous aluminum body, which has excellent joint strength between the porous aluminum body and the aluminum bulk body, and a method of producing the porous aluminum complex, are provided. The porous aluminum complex includes: a porous aluminum body made of aluminum or aluminum alloy; and an aluminum bulk body made of aluminum or aluminum alloy, the porous aluminum body and the aluminum bulk body being joined each other. The junction between the porous aluminum body and the aluminum bulk body includes a Ti—Al compound. It is preferable that pillar-shaped protrusions projecting toward the outside are formed on outer surfaces of one of or both of the porous aluminum body and the aluminum bulk body, and the pillar-shaped protrusions include the junction.Type: ApplicationFiled: June 1, 2015Publication date: February 16, 2017Inventors: Ji-bin Yang, Koichi Kita, Toshihiko Saiwai, Koji Hoshino, Jun Katoh
-
Publication number: 20170043398Abstract: A high-quality porous aluminum sintered compact, which can be produced efficiently at a low cost; has an excellent dimensional accuracy with a low shrinkage ratio during sintering; and has sufficient strength, and a method of producing the porous aluminum sintered compact are provided. The porous aluminum sintered compact is the porous aluminum sintered compact that includes aluminum substrates sintered each other. The junction, in which the aluminum substrates are bonded each other, includes the Ti—Al compound and the Mg oxide. It is preferable that the pillar-shaped protrusions projecting toward the outside are formed on outer surfaces of the aluminum substrates, and the pillar-shaped protrusions include the junction.Type: ApplicationFiled: May 18, 2015Publication date: February 16, 2017Applicant: Mitsubishi Materials CorporationInventors: Ji-bin Yang, Koichi Kita, Toshihiko Saiwai, Koji Hoshino, Jun Katoh
-
Publication number: 20170028473Abstract: A high-quality porous aluminum sintered compact, which can be produced efficiently at a low cost; has an excellent dimensional accuracy with a low shrinkage ratio during sintering; and has sufficient strength, and a method of producing the porous aluminum sintered compact are provided. The porous aluminum sintered compact is the porous aluminum sintered compact that includes aluminum substrates sintered each other. The junction, in which the aluminum substrates are bonded each other, includes the Ti—Al compound and the eutectic element compound capable of eutectic reaction with Al. It is preferable that the pillar-shaped protrusions projecting toward the outside are formed on outer surfaces of the aluminum substrates, and the pillar-shaped protrusions include the junction.Type: ApplicationFiled: May 18, 2015Publication date: February 2, 2017Inventors: Ji-Bin Yang, Koichi Kita, Toshihiko Saiwai, Koji Hoshino, Jun Katoh
-
Patent number: 8523722Abstract: Disclosed is a pulley capable of meeting requirements for both enhancement in friction coefficient, and maintenance of abrasion resistance, required of a belt CVT (continuously variable transmission). The pulley is a pulley of the continuously variable transmission for effecting power transmission between an element and the pulley, being composed of a steel stock containing a predetermined amount of Mn, wherein the surface of the steel stock has a surface-hardened layer of either a nitriding layer or a carbonitriding layer, containing the predetermined amount of Mn, and the surface-hardened layer has properties for stably securing friction coefficient not lower than 0.115, exceeding the friction coefficient of SCr420H steel currently in use, and maintaining abrasion resistance equivalent to the abrasion resistance of the SCr420H steel, or improving the same.Type: GrantFiled: August 17, 2007Date of Patent: September 3, 2013Assignee: Kobe Steel, Ltd.Inventors: Jun Katoh, Hideo Hata, Kenji Yamamoto
-
Patent number: 8487206Abstract: Provided is a joint product of a steel product and an aluminum material, the joint product being formed by joining the steel product having a sheet thickness t1 of 0.3 to 3.0 mm with the aluminum material having a sheet thickness t2 of 0.5 to 4.0 mm by spot welding, wherein a nugget area in a joint part is from 20×t20.5 to 100×t20.5 mm2, an area of a portion where a thickness of an interface reaction layer is from 0.5 to 3 ?m is 10×t20.5 mm2 or more, and a difference between the thickness of the interface reaction layer at a joint part center and the thickness of the interface reaction layer at a point distant from the joint part center by a distance of one-fourth of a joint diameter is 5 ?m or less, and wherein the aluminum material is pure aluminum or an aluminum alloy material.Type: GrantFiled: July 27, 2011Date of Patent: July 16, 2013Assignee: Kobe Steel, Ltd.Inventors: Wataru Urushihara, Mikako Takeda, Katsushi Matsumoto, Jun Katoh
-
Publication number: 20120021240Abstract: Provided is a joint product of a steel product and an aluminum material, the joint product being formed by joining the steel product having a sheet thickness t1 of 0.3 to 3.0 mm with the aluminum material having a sheet thickness t2 of 0.5 to 4.0 mm by spot welding, wherein a nugget area in a joint part is from 20×t20.5 to 100×t20.5 mm2, an area of a portion where a thickness of an interface reaction layer is from 0.5 to 3 ?m is 10×t20.5 mm2 or more, and a difference between the thickness of the interface reaction layer at a joint part center and the thickness of the interface reaction layer at a point distant from the joint part center by a distance of one-fourth of a joint diameter is 5 ?m or less, and wherein the aluminum material is pure aluminum or an aluminum alloy material.Type: ApplicationFiled: July 27, 2011Publication date: January 26, 2012Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Wataru Urushihara, Mikako Takeda, Katsushi Matsumoto, Jun Katoh
-
Patent number: 7951465Abstract: To provide a steel-aluminum welded material and a spot welding method therefor having high weld strength. The steel-aluminum welded material 3 includes a steel material 1 and an aluminum material 2 having predetermined widths. The area of a nugget 5 of a spot-welded part is determined as a function of the thickness of the aluminum material 2, and the area of a part of the nugget 5 corresponding to a part having a thickness in a range between 0.5 and 10 ?m of an interface reaction layer 6 is defined as a function of the thickness of the aluminum material 2.Type: GrantFiled: April 20, 2005Date of Patent: May 31, 2011Assignee: Kobe Steel, Ltd.Inventors: Wataru Urushihara, Mikako Takeda, Katsushi Matsumoto, Jun Katoh, Yasuaki Sugizaki, Hidekazu Ido
-
Publication number: 20100009795Abstract: Disclosed is a pulley capable of meeting requirements for both enhancement in friction coefficient, and maintenance of abrasion resistance, required of a belt CVT (continuously variable transmission). The pulley is a pulley of the continuously variable transmission for effecting power transmission between an element and the pulley, being composed of a steel stock containing a predetermined amount of Mn, wherein the surface of the steel stock has a surface-hardened layer of either a nitriding layer or a carbonitriding layer, containing the predetermined amount of Mn, and the surface-hardened layer has properties for stably securing friction coefficient not lower than 0.115, exceeding the friction coefficient of SCr420H steel currently in use, and maintaining abrasion resistance equivalent to the abrasion resistance of the SCr420H steel, or improving the same.Type: ApplicationFiled: August 17, 2007Publication date: January 14, 2010Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Jun Katoh, Hideo Hata, Kenji Yamamoto
-
Patent number: 7521129Abstract: Disclosed is a steel sheet for dissimilar materials weldbonding to an aluminum material, the steel sheet containing, in mass, C: 0.02 to 0.3%, Si: 0.2 to 5.0%, Mn: 0.2 to 2.0%, and Al: 0.002 to 0.1%, further one or more of Ti: 0.005 to 0.10%, Nb: 0.005 to 0.10%, Cr: 0.05 to 1.0%, and Mo: 0.01 to 1.0%, and the balance consisting of Fe and unavoidable impurities. In the steel sheet, (i) the proportion of the oxide containing Mn and Si by 1 at.Type: GrantFiled: May 19, 2006Date of Patent: April 21, 2009Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Mikako Takeda, Wataru Urushihara, Katsushi Matsumoto, Jun Katoh
-
Publication number: 20090017328Abstract: 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: ApplicationFiled: February 6, 2007Publication date: January 15, 2009Applicant: Kabkushiki Kaisha Kobe Seiko Sho (Kobe Stell, Ltd.Inventors: Jun Katoh, Mikako Takeda, Seiji Sasabe, Katsushi Matsumoto, Hidekazu Ido, Tsuyoshi Matsumoto
-
Publication number: 20090011269Abstract: To provide a joint product of a steel product and an aluminum material, and a spot welding method for the joint product, ensuring that spot welding with high bonding strength can be performed. In one embodiment, a steel product 1 having a sheet thickness t1 of 0.3 to 3.0 mm and an aluminum material 2 having a sheet thickness t2 of 0.5 to 4.0 mm are joined together by spot welding to form a joint product of a steel product and an aluminum produce. In this joint product, the nugget area in the joint part is from 20×t20.5 to 100×t20.5 mm2, the area of a portion where the thickness of the interface reaction layer is from 0.5 to 3 ?m is 10×t20.5 mm2 or more, and the difference between the interface reaction layer thickness at the joint part center and the interface reaction layer thickness at a point distant from the joint part center by a distance of one-fourth of the joint diameter Dc is 5 ?m or less.Type: ApplicationFiled: February 21, 2007Publication date: January 8, 2009Inventors: Wataru Urushihara, Mikako Takeda, Katsushi Matsumoto, Jun Katoh
-
Patent number: 7473864Abstract: A joined part of an aluminum-coated steel sheet and an aluminum sheet is composed of an intermetallic compound layer which exists in a region in which a part of a coated layer exists before the joining and an aluminum melted and solidified part which also exists on the side of the aluminum sheet to enclose the intermetallic compound layer. The atoms existing on the surface of the aluminum melted and solidified part are intermetallic-bonded with atoms which exist on the surface of the steel sheet except in the region in which the intermetallic compound layer exists seen in the plan view. Further, the area of the intermetallic compound layer is limited to 60% or less of the total area of the joined part at the interface between the aluminum-coated steel sheet and the aluminum sheet. Thus, the area of the aluminum melted and solidified part exceeds 40% of the total area of the joined part. The strong joining having a high fracture energy can be provided at a high efficiency.Type: GrantFiled: May 19, 2004Date of Patent: January 6, 2009Assignees: Kobe Steel, Ltd., Nisshin Steel Co., Ltd.Inventors: Tetsu Iwase, Seiji Sasabe, Mitsuo Hino, Kensuke Tsubota, Fumihiro Sato, Shunichi Hashimoto, Jun Katoh, Hiroyuki Takeda
-
Publication number: 20070212565Abstract: To provide a steel-aluminum welded material and a spot welding method therefor having high weld strength. The steel-aluminum welded material 3 includes a steel material 1 and an aluminum material 2 having predetermined widths. The area of a nugget 5 of a spot-welded part is determined as a function of the thickness of the aluminum material 2, and the area of a part of the nugget 5 corresponding to a part having a thickness in a range between 0.5 and 10 ?m of an interface reaction layer 6 is defined as a function of the thickness of the aluminum material 2.Type: ApplicationFiled: April 20, 2005Publication date: September 13, 2007Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Wataru Urushihara, Mikako Takeda, Katsushi Matsumoto, Jun Katoh, Yasuaki Sugizaki, Hidekazu Ido