Patents by Inventor Tetsunao Ikeda
Tetsunao Ikeda 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: 11945056Abstract: A gas shielded arc welding wire contains, based on total mass of the wire in terms of mass %: C: 0.01% to 0.50%; Si: 0.01% to 1.50%; Mn: 0.10% to 2.50%; Cr: 5% to 15%; Ni: 0.05% to 1.50%; Mo: 0.1% to 2.0%; V: 0.1% to 1.0%; Nb: 0.01% to 0.20%; REM: 0.001% to 0.050%; S: 0.0010% to 0.0200%; and O: 0.025% or less (including 0%), which satisfies the following relationship: 3.0?(Nb+10×REM)/(S+O)?200.0.Type: GrantFiled: November 29, 2018Date of Patent: April 2, 2024Assignee: Kobe Steel, Ltd.Inventors: Kazuya Ikai, Tetsunao Ikeda
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Patent number: 10870178Abstract: A flux-cored wire for arc welding of a duplex stainless steel includes a stainless-steel sheath filled with a flux and contains, with respect to the total mass of the wire, predetermined amounts of Cr, Ni, Mo, N, Mn, and Si, in which letting a Ti alloy content in terms of Ti be [Ti] and letting an Al alloy content in terms of Al be [Al], [Ti] and [Al] are predetermined values, and in which parameter A expressed as A=[Ti]+2×[Al] satisfies a predetermined value, and the balance is composed of Fe, a slag-forming component, and incidental impurities.Type: GrantFiled: January 4, 2017Date of Patent: December 22, 2020Assignee: Kobe Steel, Ltd.Inventors: Masatoshi Ishida, Hiroshi Sugahara, Tetsunao Ikeda, Shigeki Nishiyama
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Publication number: 20200306896Abstract: A gas shielded arc welding wire contains, based on total mass of the wire in terms of mass %: C: 0.01% to 0.50%; Si: 0.01% to 1.50%; Mn: 0.10% to 2.50%; Cr: 5% to 15%; Ni: 0.05% to 1.50%; Mo: 0.1% to 2.0%; V: 0.1% to 1.0%; Nb: 0.01% to 0.20%; REM: 0.001% to 0.050%; S: 0.0010% to 0.0200%; and O: 0.025% or less (including 0%), which satisfies the following relationship: 3.0?(Nb+10×REM)/(S+O)?200.0.Type: ApplicationFiled: November 29, 2018Publication date: October 1, 2020Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Kazuya IKAI, Tetsunao IKEDA
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Patent number: 10710201Abstract: An Ni-based alloy solid wire for welding has a composition comprising specific amounts of Cr, Ti, Nb, C, S, Mn and Fe, where Mo+W, P, Si, Al, Ca, B, Mg, Zr, Co, O, H, and N are controlled to specific amounts, ([Ti]+[Nb])/[C] is 80 to 150, and the balance is Ni and inevitable impurities. [Ti], [Nb], and [C] represent the contents of Ti, Nb, and C (mass %), respectively.Type: GrantFiled: February 9, 2017Date of Patent: July 14, 2020Assignee: Kobe Steel, Ltd.Inventors: Tetsunao Ikeda, Hiroshi Sugahara, Hiroaki Kawamoto
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Patent number: 10369666Abstract: It is an object to provide a stainless steel flux-cored wire in which the amount of hexavalent chromium in fume can be reduced while maintaining the weldability excellent. The stainless steel flux-cored wire contains, as percentage to the total mass of the wire: Cr: 11-30 mass %; metal Si, Si oxide and Si compound: 0.5-4.0 mass % in total in terms of Si [Si]; fluorine compound: 0.01-1.0 mass % in terms of F [F]; TiO2: 1.5 mass % or above; ZrO2+Al2O3: 3.2 mass % or below; Na compound, K compound and Li compound: 0.50 mass % or below in total of each of an amount in terms of Na [Na], an amount in terms of K [K] and an amount in terms of Li [Li]; and satisfies {([Na]+[K]+[Li])×[Cr]2}/([Si]+4.7×[F])?10, where [Cr] represents Cr content.Type: GrantFiled: January 3, 2012Date of Patent: August 6, 2019Assignee: Kobe Steel, Ltd.Inventors: Hiroshi Sugahara, Tetsunao Ikeda, Hirohisa Watanabe
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Publication number: 20190039188Abstract: An Ni-based alloy solid wire for welding has a composition comprising specific amounts of Cr, Ti, Nb, C, S, Mn and Fe, where Mo+W, P, Si, Al, Ca, B, Mg, Zr, Co, O, H, and N are controlled to specific amounts, ([Ti]+[Nb])/[C] is 80 to 150, and the balance is Ni and inevitable impurities. [Ti], [Nb], and [C] represent the contents of Ti, Nb, and C (mass %), respectively.Type: ApplicationFiled: February 9, 2017Publication date: February 7, 2019Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Tetsunao IKEDA, Hiroshi SUGAHARA, Hiroaki KAWAMOTO
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Patent number: 9969033Abstract: The contents of Cr, Fe, Mn, Ti, Si, Cu, N, Al, C, Mg, Mo, B, Zr, and Nb+Ta in a Ni-base alloy weld metal are properly specified and the contents of Co, P, and S in incidental impurities are controlled. In particular, a weld metal having high cracking resistance is formed by specifying the Mn content in a proper range and restricting the contents of B and Zr at low levels. Regarding a Ni-base alloy covered electrode, by specifying the contents of a slag-forming agent, a metal fluoride, and a carbonate serving as flux components in proper ranges and controlling the contents of Mn, Nb+Ta, and Fe in a flux, good welding workability is achieved and a weld metal having good bead appearance is formed.Type: GrantFiled: November 4, 2011Date of Patent: May 15, 2018Assignee: Kobe Steel, Ltd.Inventors: Hiroaki Kawamoto, Hirohisa Watanabe, Tetsunao Ikeda, Yushi Sawada
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Patent number: 9751158Abstract: In a stainless steel flux cored wire comprising a stainless steel shell and a flux filling the shell, the amount of Si contained in the entire wire is 2.5% by mass or higher, preferably 3.0% by mass or higher in terms of SiO2, and the amount of at least one compound selected from the group consisting of polytetrafluoroethylene, graphite fluoride and perfluoropolyether contained in the flux is 0.005 to 0.10% by mass of the total mass of the wire in terms of F, preferably 0.020% by mass or higher. By employing such a constitution, in welding of Cr—Ni-based and Cr-based stainless steels and other materials, fume generation and hexavalent chromium leaching can be significantly reduced, and excellent welding workability can be provided.Type: GrantFiled: January 3, 2011Date of Patent: September 5, 2017Assignee: Kobe Steel, Ltd.Inventors: Tetsunao Ikeda, Hiroshi Sugahara, Hirohisa Watanabe
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Publication number: 20170239758Abstract: A flux-cored wire for are welding of a duplex stainless steel includes a stainless-steel sheath filled with a flux and contains, with respect to the total mass of the wire, predetermined amounts of Cr, Ni, Mo, N, Mn, and Si, in which letting a Ti alloy content in terms of Ti be [Ti] and letting an Al alloy content in terms of Al be [Al], [Ti] and [Al] are predetermined values, and in which parameter A expressed as A=[Ti]+2×[Al] satisfies a predetermined value, and the balance is composed of Fe, a slag-forming component, and incidental impurities.Type: ApplicationFiled: January 4, 2017Publication date: August 24, 2017Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Masatoshi Ishida, Hiroshi Sugahara, Tetsunao Ikeda, Shigeki Nishiyama
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Patent number: 8492679Abstract: A flux-cored wire for stainless steel arc welding including an outer sheath made of stainless steel and flux filled up in the outer sheath contains, as percentage to the total mass of the wire, Cr: 22.0-30.0 mass %, Ni: 6.0-12.0 mass %, Mo: 2.0-5.0 mass %, N: 0.20-0.35 mass %, TiO2: 4.0-9.0 mass %, SiO2: 0.1-2.0 mass %, ZrO2: 0.5-4.0 mass %, total of Li2O, Na2O and K2O: 0.50-1.50 mass %, metal fluoride in terms of fluorine amount: 0.10-0.90 mass %, and rare earth element component: 0.10-1.00 mass %, limits C to 0.04 mass % or below, W to 4.0 mass % or below, Cu to 2.0 mass % or below, Bi2O3 to 0.01 mass % or below, and limits oxides other than the above to 3.0 mass % or below. With such a composition, it is possible to obtain a weld bead which is excellent in the weldability in welding in all attitudes and is more excellent in the low temperature toughness while keeping excellent pitting corrosion resistance in arc welding of duplex stainless steel and the like.Type: GrantFiled: November 29, 2010Date of Patent: July 23, 2013Assignee: Kobe Steel, Ltd.Inventors: Hiroshi Sugahara, Tetsunao Ikeda, Hirohisa Watanabe
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Patent number: 8343419Abstract: An object of the present invention is to provide a Ni base alloy solid wire for welding, which has excellent cracking resistance to ductility dip cracking in weld metal, can increase the tensile strength of the weld metal to not less than the tensile strength of the base material, and has excellent weldability. The present invention provides a solid wire which has a composition containing Cr: 27.0 to 31.5 mass %, Ti: 0.50 to 0.90 mass %, Nb: 0.40 to 0.70 mass %, Ta: 0.10 to 0.30 mass %, C: 0.010 to 0.030 mass %, and Fe: 5.0 to 11.0 mass %, and is regulated to Al: 0.10 mass % or less, N: 0.020 mass % or less, Zr 0.005 mass % or less, P:0.010 mass % or less, S: 0.0050 mass % or less, Si: 0.50 mass % or less, and Mn: 1.00 mass % or less, with the balance including Ni and inevitable impurities.Type: GrantFiled: February 8, 2011Date of Patent: January 1, 2013Assignee: Kobe Steel, Ltd.Inventors: Tetsunao Ikeda, Masaki Shimamoto, Shun Izutani, Hiroaki Kawamoto, Yushi Sawada, Hirohisa Watanabe
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Publication number: 20120276384Abstract: The contents of Cr, Fe, Mn, Ti, Si, Cu, N, Al, C, Mg, Mo, B, Zr, and Nb+Ta in a Ni-base alloy weld metal are properly specified and the contents of Co, P, and S in incidental impurities are controlled. In particular, a weld metal having high cracking resistance is formed by specifying the Mn content in a proper range and restricting the contents of B and Zr at low levels. Regarding a Ni-base alloy covered electrode, by specifying the contents of a slag-forming agent, a metal fluoride, and a carbonate serving as flux components in proper ranges and controlling the contents of Mn, Nb+Ta, and Fe in a flux, good welding workability is achieved and a weld metal having good bead appearance is formed.Type: ApplicationFiled: November 4, 2011Publication date: November 1, 2012Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hiroaki Kawamoto, Hirohisa Watanabe, Tetsunao Ikeda, Yushi Sawada
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Publication number: 20120223064Abstract: It is an object to provide a stainless steel flux-cored wire in which the amount of hexavalent chromium in fume can be reduced while maintaining the weldability excellent. The stainless steel flux-cored wire contains, as percentage to the total mass of the wire: Cr: 11-30 mass %; metal Si, Si oxide and Si compound: 0.5-4.0 mass % in total in terms of Si [Si]; fluorine compound: 0.01-1.0 mass % in terms of F [F]; TiO2: 1.5 mass % or above; ZrO2+Al2O3: 3.2 mass % or below; Na compound, K compound and Li compound: 0.50 mass % or below in total of each of an amount in terms of Na [Na], an amount in terms of K [K] and an amount in terms of Li [Li]; and satisfies {([Na]+[K]+[Li])×[Cr]2}/([Si]+4.7×[F])?10, where [Cr] represents Cr content.Type: ApplicationFiled: January 3, 2012Publication date: September 6, 2012Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel Ltd.)Inventors: Hiroshi SUGAHARA, Tetsunao Ikeda, Hirohisa Watanabe
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Publication number: 20120118936Abstract: An object of the present invention is to provide a Ni base alloy solid wire for welding, which has excellent cracking resistance to ductility dip cracking in weld metal, can increase the tensile strength of the weld metal to not less than the tensile strength of the base material, and has excellent weldability. The present invention provides a solid wire which has a composition containing Cr: 27.0 to 31.5 mass %, Ti: 0.50 to 0.90 mass %, Nb: 0.40 to 0.70 mass %, Ta: 0.10 to 0.30 mass %, C: 0.010 to 0.030 mass %, and Fe: 5.0 to 11.0 mass %, and is regulated to Al: 0.10 mass % or less, N: 0.020 mass % or less, Zr 0.005 mass % or less, P:0.010 mass % or less, S: 0.0050 mass % or less, Si: 0.50 mass % or less, and Mn: 1.00 mass % or less, with the balance including Ni and inevitable impurities.Type: ApplicationFiled: February 8, 2011Publication date: May 17, 2012Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Tetsunao IKEDA, Masaki Shimamoto, Shun Izutani, Hiroaki Kawamoto, Yushi Sawada, Hirohisa Watanabe
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Publication number: 20110180523Abstract: In a stainless steel flux cored wire comprising a stainless steel shell and a flux filling the shell, the amount of Si contained in the entire wire is 2.5% by mass or higher, preferably 3.0% by mass or higher in terms of SiO2, and the amount of at least one compound selected from the group consisting of polytetrafluoroethylene, graphite fluoride and perfluoropolyether contained in the flux is 0.005 to 0.10% by mass of the total mass of the wire in terms of F, preferably 0.020% by mass or higher. By employing such a constitution, in welding of Cr—Ni-based and Cr-based stainless steels and other materials, fume generation and hexavalent chromium leaching can be significantly reduced, and excellent welding workability can be provided.Type: ApplicationFiled: January 3, 2011Publication date: July 28, 2011Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd)Inventors: Tetsunao IKEDA, Hiroshi Sugahara, Hirohisa Watanabe
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Publication number: 20110171485Abstract: A flux-cored nickel-based alloy wire contains, based on the total mass of the wire, 3 to 11 percent by mass of TiO2, 0.2 to 1.3 percent by mass of SiO2, 1 to 3 percent by mass of ZrO2, and 0.3 to 1.0 percent by mass of manganese oxides in terms of MnO2, contains of a total of 0.2 to 1.0 percent by mass in terms of Na, K and Li of sodium compounds, potassium compounds, and lithium compounds. The flux has a ratio (([TiO2]+[ZrO2])/[SiO2]) of the total of the TiO2 and ZrO2 contents to the SiO2 content of 5.0 to 14.5, in which [TiO2], [SiO2] and [ZrO2] represent TiO2, SiO2 and ZrO2 contents. The wire shows excellent weldability in welding of all positions typically on 9% nickel steels and nickel-based alloy steels and gives a weld metal having good pitting resistance, bead appearance, and resistance to hot cracking.Type: ApplicationFiled: December 13, 2010Publication date: July 14, 2011Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hiroaki KAWAMOTO, Tetsunao Ikeda, Hirohisa Watanabe
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Publication number: 20110139761Abstract: A flux-cored wire for stainless steel arc welding including an outer sheath made of stainless steel and flux filled up in the outer sheath contains, as percentage to the total mass of the wire, Cr: 22.0-30.0 mass %, Ni: 6.0-12.0 mass %, Mo: 2.0-5.0 mass %, N: 0.20-0.35 mass %, TiO2: 4.0-9.0 mass %, SiO2: 0.1-2.0 mass %, ZrO2: 0.5-4.0 mass %, total of Li2O, Na2O and K2O: 0.50-1.50 mass %, metal fluoride in terms of fluorine amount: 0.10-0.90 mass %, and rare earth element component: 0.10-1.00 mass %, limits C to 0.04 mass % or below, W to 4.0 mass % or below, Cu to 2.0 mass % or below, Bi2O3 to 0.01 mass % or below, and limits oxides other than the above to 3.0 mass % or below. With such a composition, it is possible to obtain a weld bead which is excellent in the weldability in welding in all attitudes and is more excellent in the low temperature toughness while keeping excellent pitting corrosion resistance in arc welding of duplex stainless steel and the like.Type: ApplicationFiled: November 29, 2010Publication date: June 16, 2011Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Hiroshi SUGAHARA, Tetsunao Ikeda, Hirohisa Watanabe