Patents by Inventor Satoshi Kinoshiro
Satoshi Kinoshiro 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: 11035014Abstract: A method for desulfurizing molten steel comprising taking a sample out from molten steel after tapping from a converter or during secondary refining and analyzing the sample rapidly with high accuracy by a method comprising a high frequency induction heating step wherein the sample is combusted and oxidized under the high frequency induction heating in an oxygen atmosphere having an oxygen purity of 99.5 vol % or more to convert S in the sample into SO2 and an analyzing step wherein SO2-containing gas produced in the high frequency induction heating step is analyzed through an ultraviolet fluorescence method to quantify S concentration of the sample.Type: GrantFiled: May 11, 2017Date of Patent: June 15, 2021Assignee: JFE STEEL CORPORATIONInventors: Satoshi Kinoshiro, Toshiyuki Ito, Ryo Kawabata, Toshiro Ishige, Kyoko Fujimoto, Masao Inose
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Patent number: 10641711Abstract: Provided are a method for analyzing nitrogen in a metal sample, an apparatus for analyzing nitrogen in a metal sample, a method for adjusting nitrogen concentration in molten steel, and a method for manufacturing steel. The method includes: a melting process in which a metal sample containing a nitrogen component is melted in an argon gas atmosphere by performing impulse heating to gasify the nitrogen component; and an analyzing process in which nitrogen content in the metal sample is determined by analyzing nitrogen gas generated in the melting process and the argon gas by using a gas discharge optical emission method. By analyzing the nitrogen concentration of a sample taken from molten steel by using the analysis method described above, and by determining treatment conditions for adjusting nitrogen concentration on the basis of the nitrogen analysis value derived by the analysis, nitrogen concentration in molten steel is adjusted.Type: GrantFiled: May 14, 2015Date of Patent: May 5, 2020Assignee: JFE STEEL CORPORATIONInventors: Satoshi Kinoshiro, Masao Inose
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Patent number: 10287644Abstract: A method for desulfurizing molten steel comprising taking a sample out from molten steel after tapping from a converter or during secondary refining and analyzing the sample rapidly with high accuracy by a method comprising a high frequency induction heating step wherein the sample is combusted and oxidized under the high frequency induction heating in an oxygen atmosphere having an oxygen purity of 99.5 vol % or more to convert S in the sample into SO2 and an analyzing step wherein SO2-containing gas produced in the high frequency induction heating step is analyzed through an ultraviolet fluorescence method to quantify S concentration of the sample.Type: GrantFiled: August 8, 2012Date of Patent: May 14, 2019Assignee: JFE STEEL CORPORATIONInventors: Satoshi Kinoshiro, Toshiyuki Ito, Ryo Kawabata, Toshiro Ishige, Kyoko Fujimoto, Masao Inose
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Publication number: 20170247773Abstract: A method for desulfurizing molten steel comprising taking a sample out from molten steel after tapping from a converter or during secondary refining and analyzing the sample rapidly with high accuracy by a method comprising a high frequency induction heating step wherein the sample is combusted and oxidized under the high frequency induction heating in an oxygen atmosphere having an oxygen purity of 99.5 vol % or more to convert S in the sample into SO2 and an analyzing step wherein SO2-containing gas produced in the high frequency induction heating step is analyzed through an ultraviolet fluorescence method to quantify S concentration of the sample.Type: ApplicationFiled: May 11, 2017Publication date: August 31, 2017Applicant: JFE STEEL CORPORATIONInventors: Satoshi KINOSHIRO, Toshiyuki ITO, Ryo KAWABATA, Toshiro ISHIGE, Kyoko FUJIMOTO, Masao INOSE
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Publication number: 20170199129Abstract: Provided are a method for analyzing nitrogen in a metal sample, an apparatus for analyzing nitrogen in a metal sample, a method for adjusting nitrogen concentration in molten steel, and a method for manufacturing steel. The method includes: a melting process in which a metal sample containing a nitrogen component is melted in an argon gas atmosphere by performing impulse heating to gasify the nitrogen component; and an analyzing process in which nitrogen content in the metal sample is determined by analyzing nitrogen gas generated in the melting process and the argon gas by using a gas discharge optical emission method. By analyzing the nitrogen concentration of a sample taken from molten steel by using the analysis method described above, and by determining treatment conditions for adjusting nitrogen concentration on the basis of the nitrogen analysis value derived by the analysis, nitrogen concentration in molten steel is adjusted.Type: ApplicationFiled: May 14, 2015Publication date: July 13, 2017Applicant: JFE STEEL CORPORATIONInventors: Satoshi Kinoshiro, Masao Inose
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Patent number: 9212411Abstract: A high-strength steel sheet includes a composition containing, in mass percent, 0.08% to 0.20% of carbon, 0.2% to 1.0% of silicon, 0.5% to 2.5% of manganese, 0.04% or less of phosphorus, 0.005% or less of sulfur, 0.05% or less of aluminum, 0.07% to 0.20% of titanium, and 0.20% to 0.80% of vanadium, the balance being iron and incidental impurities.Type: GrantFiled: June 29, 2010Date of Patent: December 15, 2015Assignee: JFE Steel CorporationInventors: Koichi Nakagawa, Takeshi Yokota, Kazuhiro Seto, Satoshi Kinoshiro, Yuji Tanaka, Katsumi Yamada, Tetsuya Mega, Katsumi Nakajima
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Patent number: 9068237Abstract: In a method for desulfurizing hot metal by analyzing S concentration of a sample taken out from the hot metal, the S concentration is analyzed rapidly and precisely by a method comprising a high frequency induction heating step of oxidizing the sample under a high frequency induction heating in a pure oxygen atmosphere to convert S in the hot metal to SO2 and an analysis step of analyzing SO2-containing gas generated in the high frequency induction heating step through an ultraviolet fluorescence method to quantify S concentration in the sample, whereby S concentration after the desulfurization is controlled precisely and hence fault of S concentration is prevented but also the increase of the cost due to the excessive addition of a desulfurization agent and step disruption at steel-making step are prevented.Type: GrantFiled: August 8, 2012Date of Patent: June 30, 2015Assignee: JFE STEEL CORPORATIONInventors: Satoshi Kinoshiro, Kyoko Fujimoto, Masao Inose, Toshiyuki Ito
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Patent number: 8900874Abstract: An analyzing method which enables highly precise and rapid quantitative analysis of sulfur contained in a metal sample, includes: combusting a metal sample containing a sulfur component under pure oxygen gas atmosphere to oxidize the sulfur component into sulfur dioxide; and quantitatively analyzing sulfur in the metal sample through analysis, according to a UV fluorescence method, of a sulfur dioxide containing gas containing the sulfur dioxide generated by combustion of the metal sample.Type: GrantFiled: February 17, 2011Date of Patent: December 2, 2014Assignee: JFE Steel CorporationInventors: Satoshi Kinoshiro, Kazutoshi Hanada, Kyoko Fujimoto
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Patent number: 8865471Abstract: A method for analyzing a metal material includes electrolyzing a metal sample in an electrolytic solution, immersing a remaining portion of the metal sample taken out of the electrolytic solution in a dispersible solution to separate at least one substance selected from the group consisting of precipitates and inclusions attached to the remaining portion of the metal sample, filtering the dispersible solution containing the at least one separated substance through filters having straight pores and a porosity of 4% or more to obtain residues trapped on the filters and filtrates, and analyzing at least one of the residues and the filtrates.Type: GrantFiled: December 25, 2008Date of Patent: October 21, 2014Assignee: JFE Steel CorporationInventors: Satoshi Kinoshiro, Tomoharu Ishida
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Publication number: 20140096643Abstract: There are provided a method for desulfurizing molten steel, characterized in that a sample taken out from molten steel after the tapping from a converter or during the secondary refining is analyzed rapidly in a high accuracy by a method comprising a high frequency induction heating step wherein the sample is combusted and oxidized under the high frequency induction heating in a pure oxygen atmosphere to convert S in the sample into SO2 and an analyzing step wherein SO2-containing gas produced in the high frequency induction heating step is analyzed through an ultraviolet fluorescence method to quantify S concentration of the sample, whereby S concentration of molten steel after the tapping from the converter can be controlled in a high accuracy to prevent failure of S concentration and also desulfurization time in the secondary refining can be shortened and the amount of the desulfurizer or the like used can be reduced, and a method of manufacturing molten steel by using such a method.Type: ApplicationFiled: August 8, 2012Publication date: April 10, 2014Applicant: JFE STEEL CORPORATIONInventors: Satoshi Kinoshiro, Toshiyuki Ito, Ryo Kawabata, Toshiro Ishige, Kyoko Fujimoto, Masao Inose
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Publication number: 20140083251Abstract: In a method for desulfurizing hot metal by analyzing S concentration of a sample taken out from the hot metal, the S concentration is analyzed rapidly and precisely by a method comprising a high frequency induction heating step of oxidizing the sample under a high frequency induction heating in a pure oxygen atmosphere to convert S in the hot metal to SO2 and an analysis step of analyzing SO2-containing gas generated in the high frequency induction heating step through an ultraviolet fluorescence method to quantify S concentration in the sample, whereby S concentration after the desulfurization is controlled precisely and hence fault of S concentration is prevented but also the increase of the cost due to the excessive addition of a desulfurization agent and step disruption at steel-making step are prevented.Type: ApplicationFiled: August 8, 2012Publication date: March 27, 2014Applicant: JFE STEEL CORPORATIONInventors: Satoshi Kinoshiro, Kyoko Fujimoto, Masao Inose, Toshiyuki Ito
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Publication number: 20130196445Abstract: An analyzing method which enables highly precise and rapid quantitative analysis of sulfur contained in a metal sample, includes: combusting a metal sample containing a sulfur component under pure oxygen gas atmosphere to oxidize the sulfur component into sulfur dioxide; and quantitatively analyzing sulfur in the metal sample through analysis, according to a UV fluorescence method, of a sulfur dioxide containing gas containing the sulfur dioxide generated by combustion of the metal sample.Type: ApplicationFiled: February 17, 2011Publication date: August 1, 2013Applicant: JFE STEEL CORPORATIONInventors: Satoshi Kinoshiro, Kazutoshi Hanada, Kyoko Fujimoto
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Patent number: 8298827Abstract: A method for analyzing a metallic material includes the steps of electrolyzing a metal sample in an electrolyte; removing the electrolyzed metal sample from the electrolyte; immersing the metal sample removed from the electrolyte into a dispersive solution that is different from the electrolyte to separate at least one selected from the group consisting of a precipitate and an inclusion deposited on the metal sample; and analyzing the at least one selected from the group consisting of a precipitate and an inclusion extracted into the dispersive solution.Type: GrantFiled: June 26, 2008Date of Patent: October 30, 2012Assignee: JFE Steel CorporationInventors: Tomoharu Ishida, Satoshi Kinoshiro, Katsumi Yamada, Hisato Noro, Kaoru Sato
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Patent number: 8222038Abstract: A method for analyzing a metal specimen includes an electrolysis step of electrolyzing a metal specimen containing a reference element and a target element in an electrolytic solution, a sampling step of sampling a portion of the electrolytic solution, an analysis step of analyzing the sampled electrolytic solution, a concentration ratio-calculating step of calculating the concentration ratio of the target element to the reference element in the electrolytic solution on the basis of the analysis results, and a content-calculating step of calculating the content of the target element present in the form of a solid solution by multiplying the content of the reference element in the metal specimen by the obtained concentration ratio.Type: GrantFiled: June 26, 2008Date of Patent: July 17, 2012Assignee: JFE Steel CorporationInventors: Satoshi Kinoshiro, Tomoharu Ishida
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Publication number: 20120107633Abstract: A high-strength steel sheet includes a composition containing, in mass percent, 0.08% to 0.20% of carbon, 0.2% to 1.0% of silicon, 0.5% to 2.5% of manganese, 0.04% or less of phosphorus, 0.005% or less of sulfur, 0.05% or less of aluminum, 0.07% to 0.20% of titanium, and 0.20% to 0.80% of vanadium, the balance being iron and incidental impurities.Type: ApplicationFiled: June 29, 2010Publication date: May 3, 2012Applicant: JFE STEEL CORPORATIONInventors: Koichi Nakagawa, Takeshi Yokota, Kazuhiro Seto, Satoshi Kinoshiro, Yuji Tanaka, Katsumi Yamada, Tetsuya Mega, Katsumi Nakajima
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Publication number: 20110240477Abstract: A method for analyzing a metal material includes electrolyzing a metal sample in an electrolytic solution, immersing a remaining portion of the metal sample taken out of the electrolytic solution in a dispersible solution to separate at least one substance selected from the group consisting of precipitates and inclusions attached to the remaining portion of the metal sample, filtering the dispersible solution containing the at least one separated substance through filters having straight pores and a porosity of 4% or more to obtain residues trapped on the filters and filtrates, and analyzing at least one of the residues and the filtrates.Type: ApplicationFiled: December 25, 2008Publication date: October 6, 2011Applicant: JFE STEEL CORPORATIONInventors: Satoshi Kinoshiro, Tomoharu Ishida
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Publication number: 20100291692Abstract: A method for analyzing a metal specimen includes an electrolysis step of electrolyzing a metal specimen containing a reference element and a target element in an electrolytic solution, a sampling step of sampling a portion of the electrolytic solution, an analysis step of analyzing the sampled electrolytic solution, a concentration ratio-calculating step of calculating the concentration ratio of the target element to the reference element in the electrolytic solution on the basis of the analysis results, and a content-calculating step of calculating the content of the target element present in the form of a solid solution by multiplying the content of the reference element in the metal specimen by the obtained concentration ratio.Type: ApplicationFiled: June 26, 2008Publication date: November 18, 2010Applicant: JFE Steel CorporationInventors: Satoshi Kinoshiro, Tomoharu Ishida
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Publication number: 20100206736Abstract: A method for analyzing a metallic material includes the steps of electrolyzing a metal sample in an electrolyte; removing the electrolyzed metal sample from the electrolyte; immersing the metal sample removed from the electrolyte into a dispersive solution that is different from the electrolyte to separate at least one selected from the group consisting of a precipitate and an inclusion deposited on the metal sample; and analyzing the at least one selected from the group consisting of a precipitate and an inclusion extracted into the dispersive solution.Type: ApplicationFiled: June 26, 2008Publication date: August 19, 2010Applicant: JFE STEEL CORPORATIONInventors: Tomoharu Ishida, Satoshi Kinoshiro, Katsumi Yamada, Hisato Noro, Kaoru Sato
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Publication number: 20100196189Abstract: A high-strength steel sheet has high stretch flangeability after working and corrosion resistance after painting. The steel sheet contains, on the basis of mass percent, C: 0.02% to 0.20%, Si: 0.3% or less, Mn: 0.5% to 2.5%, P: 0.06% or less, S: 0.01% or less, Al: 0.1% or less, Ti: 0.05% to 0.25%, and V: 0.05% to 0.25%, the remainder being Fe and incidental impurities. The steel sheet has a substantially ferritic single phase, the ferritic single phase containing precipitates having a size of less than 20 nm, the precipitates containing 200 to 1750 mass ppm Ti and 150 to 1750 mass ppm V, V dissolved in solid solution being 200 or more but less than 1750 mass ppm.Type: ApplicationFiled: July 31, 2008Publication date: August 5, 2010Applicant: JFE STEEL CORPORATIONInventors: Koichi Nakagawa, Takeshi Yokota, Nobuyuki Nakamura, Kazuhiro Seto, Satoshi Kinoshiro, Katsumi Yamada
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Patent number: 5537206Abstract: A method for analyzing steel which comprises: grinding an analysis area of a steel ingot; sealing the analysis area with a sealing section of a cell for generating fine particles; again grinding the analysis area, while an argon gas is introduced into the cell; irradiating a pulsed laser beam of 10.sup.8 W/cm.sup.2 or more onto the analysis area at an irradiating spot of at least 1 mm.sup.2 to generate the fine particles; moving the irradiating spot; and transferring the generated fine particles by the argon gas to a plasma emission analysis for analysis. A further method for analyzing steel comprises: solidifying a molten steel sample, forming a red-hot sample; putting the sample into a sample holding section of a sample chamber under a purified argon gas atmosphere, the sample holding section having an inner curved surface the same as a curved surface of the sample; irradiating a pulsed laser onto the sample to remove a sample surface layer of 25 .mu.Type: GrantFiled: October 31, 1994Date of Patent: July 16, 1996Assignee: NKK CorporationInventors: Takanori Akiyoshi, Tadashi Mochizuki, Akiko Sakashita, Yohichi Ishibashi, Satoshi Kinoshiro, Yoshihito Iwata, Yoshihiko Kawai, Yoichi Nimura, Hiroaki Miyahara