Patents by Inventor Yasuhito Totsuka
Yasuhito Totsuka 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).
-
Publication number: 20220281024Abstract: A flux-cored wire according to an aspect of the present invention includes: a steel sheath; and a flux filling the inside of the steel sheath, in which the flux contains 0.11% or more in total of a fluoride in terms of F-equivalent value, 4.30% to 7.50% of a Ti oxide in terms of TiO2 equivalent, 0.30% to 2.40% in total of an oxide in terms of mass %, and 0% to 0.60% in total of a carbonate in terms of mass %, the amount of a Ca oxide in terms of CaO is less than 0.20% in terms of mass %, the amount of CaF2 is less than 0.50%, a chemical composition of the flux-cored wire is within a predetermined range, a Z value is 2.00% or less, a V value is 5.0 to 27.0, and Ceq is 0.30% to 1.00% or less.Type: ApplicationFiled: May 23, 2022Publication date: September 8, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Hiroki FUJIMOTO, Kotaro WATANABE, Yasuhito TOTSUKA
-
Patent number: 11400539Abstract: A flux-cored wire according to an aspect of the present invention includes: a steel sheath; and a flux filling the inside of the steel sheath, in which the flux contains 0.11% or more in total of a fluoride in terms of F-equivalent value, 4.30% to 7.50% of a Ti oxide in terms of TiO2 equivalent, 0.30% to 2.40% in total of an oxide in terms of mass %, and 0% to 0.60% in total of a carbonate in terms of mass %, the amount of a Ca oxide in terms of CaO is less than 0.20% in terms of mass %, the amount of CaF2 is less than 0.50%, a chemical composition of the flux-cored wire is within a predetermined range, a Z value is 2.00% or less, a V value is 5.0 to 27.0, and Ceq is 0.30% to 1.00% or less.Type: GrantFiled: November 8, 2016Date of Patent: August 2, 2022Assignee: NIPPON STEEL CORPORATIONInventors: Hiroki Fujimoto, Kotaro Watanabe, Yasuhito Totsuka
-
Patent number: 11331742Abstract: According to an aspect of the present invention, there is provided a flux-cored wire including a steel sheath and a flux that fills the steel sheath. The flux contains fluorides of which a total value ? of F-equivalent values is 0.21% or more, oxides of which the total value ? of amounts ranges from 0.30% to less than 3.50%, and carbonates of which a total value of amounts ranges from 0% to 3.50%. An amount of CaO ranges from 0% to less than 0.20%. An amount of iron powder ranges from 0% to less than 10.0%. A X-value is 5.0% or less. The amount of CaF2 is less than 0.50%. The amount of Ti oxides ranges from 0.10% to less than 2.50%. A ratio of ? to ? ranges from 0.10 to 4.00. A total value of amounts of MgCO3, Na2CO3, and LiCO3 ranges from 0% to 3.00%. Other chemical composition is within a predetermined range. Ceq ranges from 0.45% to 1.20%.Type: GrantFiled: March 8, 2016Date of Patent: May 17, 2022Assignee: NIPPON STEEL CORPORATIONInventors: Kotaro Watanabe, Tatsuya Kumagai, Hiroki Fujimoto, Yasuhito Totsuka
-
Publication number: 20200070273Abstract: According to an aspect of the present invention, there is provided a flux-cored wire including a steel sheath and a flux that fills the steel sheath. The flux contains fluorides of which a total value a of F-equivalent values is 0.21% or more, oxides of which the total value ? of amounts ranges from 0.30% to less than 3.50%, and carbonates of which a total value of amounts ranges from 0% to 3.50%. An amount of CaO ranges from 0% to less than 0.20%. An amount of iron powder ranges from 0% to less than 10.0%. A X-value is 5.0% or less. The amount of CaF2 is less than 0.50%. The amount of Ti oxides ranges from 0.10% to less than 2.50%. A ratio of ? to ? ranges from 0.10 to 4.00. A total value of amounts of MgCO3, Na2CO3, and LiCO3 ranges from 0% to 3.00%. Other chemical composition is within a predetermined range. Ceq ranges from 0.45% to 1.20%.Type: ApplicationFiled: March 8, 2016Publication date: March 5, 2020Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kotaro WATANABE, Tatsuya KUMAGAI, Hiroki FUJIMOTO, Yasuhito TOTSUKA
-
Patent number: 10464174Abstract: A wire includes, in terms of % by mass with respect to a total mass of the wire, as a total in a steel outer skin and a flux, 0.03 to 0.09% of C, 0.1 to 0.6% of Si, 1.3 to 2.6% of Mn, 0.01 to 0.5% of Cu, 0.05 to 0.5% of Ti, 0.002 to 0.015% of B, and 0.05% or less of Al, and further including, in the flux, 5 to 9% in terms of TiO2, 0.1 to 0.6% of in terms of SiO2, 0.02 to 0.3% in terms of Al2O3, 0.1 to 0.8% of Mg, 0.05 to 0.3% in terms of F, 0.05 to 0.3% in terms of Na and K in a fluorine compound, 0.05 to 0.2% of Na2O and K2O, and 0.1% or less in terms of ZrO2.Type: GrantFiled: November 15, 2016Date of Patent: November 5, 2019Assignee: NIPPON STEEL WELDING & ENGINEERING CO., LTD.Inventors: Kiyohito Sasaki, Rikiya Takayama, Yasuhito Totsuka
-
Publication number: 20190329347Abstract: A flux-cored wire according to an aspect of the present invention includes: a steel sheath; and a flux filling the inside of the steel sheath, in which the flux contains 0.11% or more in total of a fluoride in terms of F-equivalent value, 4.30% to 7.50% of a Ti oxide in terms of TiO2 equivalent, 0.30% to 2.40% in total of an oxide in terms of mass %, and 0% to 0.60% in total of a carbonate in terms of mass %, the amount of a Ca oxide in terms of CaO is less than 0.20% in terms of mass %, the amount of CaF2 is less than 0.50%, a chemical composition of the flux-cored wire is within a predetermined range, a Z value is 2.00% or less, a V value is 5.0 to 27.0, and Ceq is 0.30% to 1.00% or less.Type: ApplicationFiled: November 8, 2016Publication date: October 31, 2019Applicant: NIPPON STEEL CORPORATIONInventors: Hiroki FUJIMOTO, Kotaro WATANABE, Yasuhito TOTSUKA
-
Patent number: 10160065Abstract: A flux-cored wire for carbon dioxide gas shielded arc welding including, in terms of % by mass with respect to a total mass of the wire, 0.03 to 0.08% of C, 0.2 to 0.7% of Si, 1.4 to 3.0% of Mn, 0.01 to 0.5% of Cu, 0.8 to 3.0% of Ni, 0.05 to 0.5% of Ti, 0.002 to 0.015% of B, 0.05% or less of Al, 4 to 8% in terms of TiO2, 0.1 to 0.6% of in terms of SiO2, 0.02 to 0.3% in terms of Al2O3, 0.1 to 0.8% of Mg, 0.05 to 0.3% in terms of F, 0.05 to 0.3% in terms of Na and K in a fluorine compound, 0.05 to 0.2% of Na2O and K2O, and 0.2% or less in terms of ZrO2.Type: GrantFiled: January 13, 2016Date of Patent: December 25, 2018Assignee: NIPPON STEEL & SUMIKIN WELDING CO., LTD.Inventors: Rikiya Takayama, Kiyohito Sasaki, Yasuhito Totsuka, Masaaki Toriyabe
-
Patent number: 10112267Abstract: A wire including, in terms of % by mass with respect to a total mass of the wire, as a total in a steel outer skin and a flux, 0.03 to 0.08% of C, 0.1 to 0.6% of Si, 1.2 to 2.5% of Mn, 0.01 to 0.5% of Cu, 0.5 to 1.5% of Ni, 0.05 to 0.5% of Ti, 0.002 to 0.015% of B, and 0.05% or less of Al, and further including, in the flux, 4 to 8% in terms of TiO2, 0.1 to 0.6% of in terms of SiO2, 0.02 to 0.3% in terms of Al2O3, 0.1 to 0.8% of Mg, 0.05 to 0.3% in terms of F, 0.05 to 0.3% in terms of Na and K in a fluorine compound, 0.05 to 0.2% of Na2O and K2O, and 0.2% or less in terms of ZrO2.Type: GrantFiled: January 12, 2016Date of Patent: October 30, 2018Assignee: NIPPON STEEL & SUMIKIN WELDING CO., LTD.Inventors: Rikiya Takayama, Kiyohito Sasaki, Yasuhito Totsuka, Masaaki Toriyabe
-
Publication number: 20180056454Abstract: A flux-cored wire for gas shielded arc welding includes C: 0.03 to 0.09%, Si: 0.1 to 0.6%, Mn: 1.3 to 3.0%, Ti: 0.05 to 0.50%, B: 0.002 to 0.015%, and Al2O3 converted value: 0.4 to 1.0%, as the total content in the steel sheath and the flux in mass % relative to the total mass of the wire; and TiO2 converted value: 5.0 to 9.0%, SiO2 converted value: 0.2 to 0.7%, ZrO2 converted value: 0.1 to 0.6%, Mg: 0.2 to 0.8%, total of F converted value: 0.02 to 0.20%, and total of Na2O converted value and K2O converted value: 0.03 to 0.20%; as a content in the flux; in which a content of C in the steel sheath is 0.03% or less in mass % relative to the total mass of the steel sheath.Type: ApplicationFiled: July 5, 2017Publication date: March 1, 2018Applicant: NIPPON STEEL & SUMIKIN WELDING CO., LTD.Inventors: Yuki KAYAMORI, Kiyohito SASAKI, Yasuhito TOTSUKA, Naoki SAKABAYASHI
-
Publication number: 20170144257Abstract: A wire includes, in terms of % by mass with respect to a total mass of the wire, as a total in a steel outer skin and a flux, 0.03 to 0.09% of C, 0.1 to 0.6% of Si, 1.3 to 2.6% of Mn, 0.01 to 0.5% of Cu, 0.05 to 0.5% of Ti, 0.002 to 0.015% of B, and 0.05% or less of Al, and further including, in the flux, 5 to 9% in terms of TiO2, 0.1 to 0.6% of in terms of SiO2, 0.02 to 0.3% in terms of Al2O3, 0.1 to 0.8% of Mg, 0.05 to 0.3% in terms of F, 0.05 to 0.3% in terms of Na and K in a fluorine compound, 0.05 to 0.2% of Na2O and K2O, and 0.1% or less in terms of ZrO2.Type: ApplicationFiled: November 15, 2016Publication date: May 25, 2017Applicant: NIPPON STEEL & SUMIKIN WELDING CO., LTD.Inventors: Kiyohito SASAKI, Rikiya TAKAYAMA, Yasuhito TOTSUKA
-
Publication number: 20170129056Abstract: A flux-cored wire for carbon dioxide gas shielded arc welding includes, in terms of % by mass with respect to a total mass of the wire, 0.03 to 0.08% of C, 0.2 to 0.6% of Si, 1.2 to 2.8% of Mn, 0.01 to 0.5% of Cu, 0.2 to 0.7% of Ni, 0.1 to 0.6% of Ti, 0.005 to 0.020% of B, 0.05% or less of Al, 4.0 to 8.0% in terms of TiO2, 0.1 to 0.6% of in terms of SiO2, 0.02 to 0.3% in terms of Al2O3, 0.1 to 0.8% of Mg, 0.05 to 0.3% in terms of F, 0.05 to 0.3% in terms of Na and K in a fluorine compound, 0.05 to 0.2% of Na2O and K2O, and 0.2% or less in terms of ZrO2.Type: ApplicationFiled: October 20, 2016Publication date: May 11, 2017Applicant: NIPPON STEEL & SUMIKIN WELDING CO., LTD.Inventors: Rikiya TAKAYAMA, Kiyohito SASAKI, Yasuhito TOTSUKA, Masaaki TORIYABE
-
Patent number: 9505088Abstract: In a flux-cored wire according to the present invention, CaF2 and the like are included and a total amount thereof ? is 3.3 to 6.0% in terms of mass % with respect to a total mass, Ti oxide and the like are included and a total amount thereof ? is 0.4 to 1.2% in terms of mass % with respect to the total mass, CaCO3 and the like are included and a total amount thereof is 0.1 to 0.5% in terms of mass % with respect to the total mass, and an amount of an iron powder in the flux is less than 10% in terms of mass % with respect to the total mass.Type: GrantFiled: November 6, 2013Date of Patent: November 29, 2016Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Shuichi Nakamura, Yasuhito Totsuka, Kazuhiro Kojima, Ryuichi Shimura
-
Patent number: 9259806Abstract: In a flux-cored wire for welding an ultrahigh tensile strength steel, one or more of CaF2, BaF2, SrF2, and MgF2 are included in the wire and, when a total amount thereof is defined as ?, the ? is more than 2.0% and equal to or less than 8.0% in terms of mass % with respect to a total mass of the wire, one or more of Ti oxide, Si oxide, Mg oxide, and Al oxide are included in the wire and, when a total amount thereof is defined as ?, the ? is 0.01% to 1.20% in terms of mass % with respect to the total mass of the wire, a ratio of an amount of the CaF2 with respect to the ? is 0.50 or more, a ratio of the ? with respect to the ? is 2.0 to 800.0, and Ceq defined in the following expression is 0.60% to 1.20%, Ceq=[C]+[Si]/24+[Mn]/6+[Ni]/40+[Cr]/5+[Mo]/4+[V]/14.Type: GrantFiled: May 2, 2013Date of Patent: February 16, 2016Assignee: Nippon Steel & Sumitomo Metal CorporationInventors: Shuichi Nakamura, Kazuhiro Kojima, Yasuhito Totsuka, Ryuichi Shimura
-
Publication number: 20150360327Abstract: In a flux-cored wire according to the present invention, CaF2 and the like are included and a total amount thereof ? is 3.3 to 6.0% in terms of mass % with respect to a total mass, Ti oxide and the like are included and a total amount thereof ? is 0.4 to 1.2% in terms of mass % with respect to the total mass, CaCO3 and the like are included and a total amount thereof is 0.1 to 0.5% in terms of mass % with respect to the total mass, and an amount of an iron powder in the flux is less than 10% in terms of mass % with respect to the total mass.Type: ApplicationFiled: November 6, 2013Publication date: December 17, 2015Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Shuichi NAKAMURA, Yasuhito TOTSUKA, Kazuhiro KOJIMA, Ryuichi SHIMURA
-
Publication number: 20150117937Abstract: In a flux-cored wire for welding an ultrahigh tensile strength steel, one or more of CaF2, BaF2, SrF2, and MgF2 are included in the wire and, when a total amount thereof is defined as ?, the ? is more than 2.0% and equal to or less than 8.0% in terms of mass % with respect to a total mass of the wire, one or more of Ti oxide, Si oxide, Mg oxide, and Al oxide are included in the wire and, when a total amount thereof is defined as ?, the ? is 0.01% to 1.20% in terms of mass % with respect to the total mass of the wire, a ratio of an amount of the CaF2 with respect to the ? is 0.50 or more, a ratio of the ? with respect to the ? is 2.0 to 800.0, and Ceq defined in following Expression a is 0.60% to 1.20%, Ceq=[C]+[Si]/24+[Mn]/6+[Ni]/40+[Cr]/5+[Mo]/4+[V]/14??(a).Type: ApplicationFiled: May 2, 2013Publication date: April 30, 2015Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Shuichi Nakamura, Kazuhiro Kojima, Yasuhito Totsuka, Ryuichi Shimura