Patents by Inventor Masafumi Yamakami
Masafumi Yamakami 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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Patent number: 10569369Abstract: A flux-cored wire for gas-shielded arc welding has a steel outer sheath filled with a flux. The flux-cored wire includes specific amounts, relative to a total mass of the wire, of TiO2, at least one of Si, an Si oxide and an Si compound, C, Mn, Mo, Ni, at least one of metal Mg and an Mg alloy, an F compound, a K compound, an Na compound, B and a B compound, and Fe, respectively. A total content of each of Ti and a Ti alloy, metal Al and an Al alloy, and V is restricted to the specific range, respectively. A content of Ti is also restricted to the specific range relative to the total mass of the steel outer sheath.Type: GrantFiled: October 15, 2015Date of Patent: February 25, 2020Assignee: Kobe Steel, Ltd.Inventors: Masafumi Yamakami, Hiroyuki Kawasaki, Masayuki Nagami
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Patent number: 10562134Abstract: Provided is a flux-cored wire for gas-shielded arc welding that contains specific amounts of C, Mn, TiO2, and Ni and specific amounts or less of P and S. The TiO2 has a ratio (?1/?2) of 0.90-1.50 when ?1 (mass %) is the content per wire total mass of particles having a size of 106 ?m or smaller and ?2 (mass %) is the content per wire total mass of particles having a size exceeding 106 ?m.Type: GrantFiled: August 25, 2016Date of Patent: February 18, 2020Assignee: Kobe Steel, Ltd.Inventors: Masafumi Yamakami, Masayuki Nagami, Yoshihiko Kitagawa
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Patent number: 10427249Abstract: Provided is a flux-cored wire for gas-shielded arc welding that contains, per wire total mass, specific amounts of C, Mn, TiO2 and specific amounts or less of P and S, and contains, in the flux, a specific amount of Ni per wire total mass. The Ni has a ratio (?1/?2) of 0.50-1.00 when ?1 (mass %) is the content per wire total mass of particles having a size of 106 ?m or less and ?2 (mass %) is the content per wire total mass of particles having a size exceeding 106 ?m.Type: GrantFiled: August 25, 2016Date of Patent: October 1, 2019Assignee: Kobe Steel, Ltd.Inventors: Masafumi Yamakami, Masayuki Nagami, Yoshihiko Kitagawa
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Publication number: 20190210164Abstract: Disclosed herein is a flux-cored wire for gas-shielded arc welding containing, based on total mass of the wire: C: from 0.03 to 0.12 mass %; Si in terms of Si in Si alloy and Si compound: from 0.20 to 0.70 mass %; Mn: from 1.0 to 4.0 mass %; Ti in terms of Ti in Ti alloy and Ti compound: from 2.4 to 4.5 mass %; Al: from 0.005 to 0.050 mass %; Ca: from 0.03 to 1.0 mass %; at least one of Ni: from 0.30 to 3.50 mass % and B: from 0.0008 to 0.012 mass %; and Fe: 80 mass % or more, and satisfies: (Ti+Mn+Al+Ca)/Si?12; and Ca/Si: from 0.07 to 0.35.Type: ApplicationFiled: September 6, 2017Publication date: July 11, 2019Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hidenori NAKO, Masaki SHIMAMOTO, Yoshitomi OKAZAKI, Masafumi YAMAKAMI, Shinya ISONO, Keito ISHIZAKI
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Publication number: 20190210165Abstract: A flux-cored wire for gas-shielded arc welding, contains, based on the total mass of the wire: C: from 0.03 to 0.12 mass %; Si in terms of Si in Si alloy and Si compound: from 0.10 to 0.50 mass %; Mn: from 1.0 to 4.0 mass %; Ti in terms of Ti in Ti alloy and Ti compound: from 2.4 to 4.5 mass %; Al: from 0.005 to 0.050 mass %; at least one of Ni: from 0.30 to 3.50 mass % and B: from 0.0008 to 0.012 mass %; and Fe: 80 mass % or more, and satisfies (Ti+Mn+Al)/Si?15.Type: ApplicationFiled: September 6, 2017Publication date: July 11, 2019Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Hidenori NAKO, Masaki SHIMAMOTO, Yoshitomi OKAZAKI, Masafumi YAMAKAMI, Shinya ISONO, Keito ISHIZAKI
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Publication number: 20180339370Abstract: Provided is a flux-cored wire for gas-shielded arc welding that contains, per wire total mass, specific amounts of C, Mn, TiO2 and specific amounts or less of P and S, and contains, in the flux, a specific amount of Ni per wire total mass. The Ni has a ratio (?1/?2) of 0.50-1.00 when ?1 (mass %) is the content per wire total mass of particles having a size of 106 ?m or less and ?2 (mass %) is the content per wire total mass of particles having a size exceeding 106 ?m.Type: ApplicationFiled: August 25, 2016Publication date: November 29, 2018Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Masafumi YAMAKAMI, Masayuki NAGAMI, Yoshihiko KITAGAWA
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Publication number: 20180326544Abstract: Provided is a flux-cored wire for gas-shielded arc welding that contains specific amounts of C, Mn, TiO2, and Ni and specific amounts or less of P and S. The TiO2 has a ratio (?1/?2) of 0.90-1.50 when ?1 (mass %) is the content per wire total mass of particles having a size of 106 ?m or smaller and ?2 (mass %) is the content per wire total mass of particles having a size exceeding 106 ?m.Type: ApplicationFiled: August 25, 2016Publication date: November 15, 2018Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Masafumi YAMAKAMI, Masayuki NAGAMI, Yoshihiko KITAGAWA
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Publication number: 20170297148Abstract: A flux-cored wire for gas-shielded arc welding has a steel outer sheath filled with a flux. The flux-cored wire includes specific amounts, relative to a total mass of the wire, of TiO2, at least one of Si, an Si oxide and an Si compound, C, Mn, Mo, Ni, at least one of metal Mg and an Mg alloy, an F compound, a K compound, an Na compound, B and a B compound, and Fe, respectively. A total content of each of Ti and a Ti alloy, metal Al and an Al alloy, and V is restricted to the specific range, respectively. A content of Ti is also restricted to the specific range relative to the total mass of the steel outer sheath.Type: ApplicationFiled: October 15, 2015Publication date: October 19, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Masafumi YAMAKAMI, Hiroyuki KAWASAKI, Masayuki NAGAMI
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Patent number: 9156112Abstract: The objective of the present invention is to provide a similar-metal-composition welding solid wire, and weld metals therefor, with which both excellent bead shape and high ultralow-temperature toughness for the weld joints can be achieved when welding 9% Ni steels together by means of a high-efficiency MIG welding method. A fixed ratio of a REM and O are included in a similar-metal-composition welding solid wire of a 9% NI steel base material, and oxygen is supplied in a trace amount in a range that does not hinder the ultralow-temperature toughness of the weld joint (1a) but that is capable of forming fine REM oxides in the weld metal (3) and of controlling the weld metal to produce an excellent bead shape. In addition, both Al and Ti are regulated and an argon gas that contains little or no carbon dioxide gas is used as the shield gas in the MIG welding method. Thus, both an excellent bead shape and high ultralow-temperature toughness for the weld joint (1a) can be achieved.Type: GrantFiled: December 22, 2010Date of Patent: October 13, 2015Assignee: Kobe Steel, Ltd.Inventors: Yoshitomi Okazaki, Hidenori Nako, Munenobu Sato, Masafumi Yamakami
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Publication number: 20130270246Abstract: The objective of the present invention is to provide a similar-metal-composition welding solid wire, and weld metals therefor, with which both excellent bead shape and high ultralow-temperature toughness for the weld joints can be achieved when welding 9% Ni steels together by means of a high-efficiency MIG welding method. A fixed ratio of a REM and O are included in a similar-metal-composition welding solid wire of a 9% NI steel base material, and oxygen is supplied in a trace amount in a range that does not hinder the ultralow-temperature toughness of the weld joint (1a) but that is capable of forming fine REM oxides in the weld metal (3) and of controlling the weld metal to produce an excellent bead shape. In addition, both Al and Ti are regulated and an argon gas that contains little or no carbon dioxide gas is used as the shield gas in the MIG welding method. Thus, both an excellent bead shape and high ultralow-temperature toughness for the weld joint (1a) can be achieved.Type: ApplicationFiled: December 22, 2010Publication date: October 17, 2013Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yoshitomi Okazaki, Hidenori Nako, Munenobu Sato, Masafumi Yamakami