Patents by Inventor Nobusuke Kariya
Nobusuke Kariya 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: 11913087Abstract: Provided is a high-strength steel sheet having excellent ductility, bendability, and TS of 500 MPa or more, in particular, a high-strength thin steel sheet for cans having a sheet thickness of 0.1 to 0.8 mm, the steel sheet having a chemical composition containing C: 0.03-0.15%, Si: 0.01-0.05%, Mn: more than 0.6% and 1.5% or less, P: 0.025% or less, S: 0.02% or less, Al: 0.01-0.10%, N: 0.0005-0.0100%, Ti: 0.005-0.020%, B: 0.0005-0.0100%, and Nb: 0.0050-0.0200% with the balance being Fe and inevitable impurities, in which the steel sheet has a metallic structure containing, in area ratio, 85% or more of ferrite and 1-10% of martensite, the martensite has a grain size of 5 ?m or less, and a ratio of martensite having a grain size of 2 ?m or less is 80% or more.Type: GrantFiled: October 29, 2018Date of Patent: February 27, 2024Assignee: JFE STEEL CORPORATIONInventors: Fusae Shiimori, Hayato Saito, Nobusuke Kariya, Katsumi Kojima
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Patent number: 11618932Abstract: A steel sheet for a two-piece can, the steel sheet includes: by mass %, C: 0.010% or more and less than 0.050%; Si: 0.04% or less; Mn: 0.10% or more and less than 0.40%; P: 0.02% or less; S:0.020% or less; Al: more than 0.030% and 0.100% or less; N: 0.0005% or more and less than 0.0030%; B: 0.0005% to 0.0030%; and balance Fe and inevitable impurities, wherein an amount of N that is present as BN and a whole amount of N satisfy the following expression (1): [N as BN]/[N]>0.5??(1), where N as BN represents the amount of N that is present as BN, and N represents the whole amount of N, tensile strength is 420 MPa to 540 MPa, elongation is 5% or more, yield elongation is 3% or less, and ?r is ?0.50 to 0.10.Type: GrantFiled: March 12, 2018Date of Patent: April 4, 2023Assignee: JFE STEEL CORPORATIONInventors: Hayato Saito, Nobusuke Kariya, Katsumi Kojima
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Patent number: 11486018Abstract: A steel sheet for a two-piece can, the steel sheet includes: by mass %, C: 0.010% or more and less than 0.030%; Si: 0.04% or less; Mn: 0.10% or more and less than 0.40%; P: 0.02% or less; S: 0.020% or less; Al: more than 0.030% and 0.100% or less; N: 0.0005% or more and less than 0.0030%; B: 0.0005% to 0.0030%; and balance Fe and inevitable impurities, wherein an amount of N that is present as BN and a whole amount of N satisfy the following expression (1): [N as BN]/[N]>0.5 ??(1), where N as BN represents the amount of N that is present as BN, and N represents the whole amount of N, a yield point is 280 MPa or more and less than 420 MPa, yield elongation is 3% or less, and ?r is ?0.30 to 0.20.Type: GrantFiled: March 12, 2018Date of Patent: November 1, 2022Assignee: JFE STEEL CORPORATIONInventors: Hayato Saito, Nobusuke Kariya, Junichi Kitagawa, Katsumi Kojima
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Publication number: 20220316023Abstract: Provided is a steel sheet for cans with high strength and sufficiently high formability particularly as a material for a can body with a neck portion. The steel sheet for cans of the present disclosure has a chemical composition containing, in mass %, C: 0.010% to 0.130%, Si: 0.04% or less, Mn: 0.10% to 1.00%, P: 0.007% to 0.100%, S: 0.0005% to 0.0090%, Al: 0.001% to 0.100%, N: 0.0050% or less, Ti: 0.0050% to 0.1000%, B: 0.0005% to less than 0.0020%, and Cr: 0.08% or less, where 0.005?(Ti*/48)/(C/12)?0.700 is satisfied; and a microstructure with a proportion of non-recrystallized ferrite of 3% or less, wherein an upper yield stress is 550 MPa to 620 MPa.Type: ApplicationFiled: June 8, 2020Publication date: October 6, 2022Applicant: JFE STEEL CORPORATIONInventors: Nobusuke KARIYA, Fusae SHIIMORI, Katsumi KOJIMA, Daisuke OTANI
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Patent number: 11459149Abstract: A steel sheet for crown cap having excellent formability from which a crown cap having an excellent pressure resistance can be produced without an expensive soft liner even if the steel sheet is subjected to sheet metal thinning, the steel sheet having: a chemical composition containing, in mass %, C: more than 0.006% and 0.012% or less, Si: 0.02% or less, Mn: 0.10% or more and 0.60% or less, P: 0.020% or less, S: 0.020% or less, Al: 0.01% or more and 0.07% or less, and N: 0.0080% or more and 0.0200% or less, with the balance being Fe and inevitable impurities; and a percentage of a region of more than 0% and less than 20% at a position of ½ of a sheet thickness, the region having a dislocation density of 1×1014 m?2 or less.Type: GrantFiled: July 25, 2018Date of Patent: October 4, 2022Assignee: JFE STEEL CORPORATIONInventors: Takashi Ueno, Nobusuke Kariya, Katsumi Kojima, Yoshihide Yamamoto, Akihiro Katagiri
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Patent number: 11359255Abstract: A steel sheet for crown cap having: a chemical composition containing, C, Si, Mn, P, S, Al, N, with the balance being Fe and inevitable impurities; a ferrite phase in a region from a depth of ¼ of a sheet thickness to a mid-thickness part, the ferrite phase having a standard deviation of ferrite grain size of 7.0 ?m or less; a yield strength of 560 MPa or more and 700 MPa or less in a rolling direction; and a difference of 25 MPa or more between a yield strength in a 2% strain tensile test and a yield strength in a tensile test after heat treatment at 170° C. for 20 minutes, in the rolling direction.Type: GrantFiled: July 25, 2018Date of Patent: June 14, 2022Assignee: JFE STEEL CORPORATIONInventors: Nobusuke Kariya, Takashi Ueno, Yoshihide Yamamoto, Katsumi Kojima, Bungo Tateno
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Publication number: 20220074031Abstract: Provided is a steel sheet for cans. A steel sheet for cans comprises: a chemical composition containing, in mass %, C: 0.010% or more and 0.130% or less, Si: 0.04% or less, Mn: 0.10% or more and 1.00% or less, P: 0.007% or more and 0.100% or less, S: 0.0005% or more and 0.0090% or less, Al: 0.001% or more and 0.100% or less, N: 0.0050% or less, Ti: 0.0050% or more and 0.1000% or less, and Cr: 0.08% or less, and satisfying a relationship 0.005?(Ti*/48)/(C/12)?0.700 where Ti*=Ti?1.5S, with a balance consisting of Fe and inevitable impurities; a microstructure in which a proportion of cementite in ferrite grains is 10% or less; and an upper yield strength of 550 MPa or more.Type: ApplicationFiled: November 13, 2019Publication date: March 10, 2022Applicant: JFE STEEL CORPORATIONInventors: Nobusuke KARIYA, Fusae SHIIMORI, Katsumi KOJIMA, Daisuke OTANI
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Publication number: 20220018003Abstract: A steel sheet for cans has a chemical composition containing, in mass percent, C: 0.085% to 0.130%, Si: 0.04% or less, Mn: 0.10% to 0.60%, P: 0.02% or less, S: more than 0.010% to 0.020%, Al: 0.02% to 0.10%, N: 0.0005% to 0.0040%, Nb: 0.007% to 0.030%, and B: 0.0010% to 0.0050%, B/N that is the ratio of the content (mass percent) of B to the content (mass percent) of N being 0.80 or more, the remainder being Fe and inevitable impurities, and a ferrite microstructure containing 1.0% or more pearlite in terms of area fraction. The steel sheet for cans has a yield stress of 500 MPa or more, a tensile strength of 550 MPa or more, a uniform elongation of 10% or more, and a yield elongation of 5.0% or less.Type: ApplicationFiled: November 5, 2019Publication date: January 20, 2022Applicant: JFE Steel CorporationInventors: Hayato Saito, Nobusuke Kariya, Katsumi Kojima
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Patent number: 10941471Abstract: Provided are a high-strength steel sheet having a specified chemical composition, in which a Mn-segregation degree in a region within 100 ?m from a surface thereof in a thickness direction is 1.5 or less, in a plane parallel to the surface of the steel sheet in a region within 100 ?m from the surface of the steel sheet in the thickness direction, the number of oxide-based inclusion grains having a grain long diameter of 5 ?m or more is 1000 or less/100 mm2, a proportion of the number of oxide-based inclusion grains having a chemical composition containing alumina of 50 mass % or more, silica of 20 mass % or less, and calcia of 40 mass % or less to the total number of oxide-based inclusions having a grain long diameter of 5 ?m or more is 80% or more, a specified metallographic structure, and a TS of 980 MPa or more, a high-strength galvanized steel sheet, and a manufacturing method thereof.Type: GrantFiled: December 26, 2016Date of Patent: March 9, 2021Assignee: JFE Steel CorporationInventors: Kenji Kawamura, Yoshihiko Ono, Nobusuke Kariya, Shinichi Furuya, Kohei Hasegawa
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Patent number: 10837078Abstract: Provided is a steel sheet having sufficient formability and strength even after sheet metal thinning, the steel sheet including: a chemical composition containing, by mass %, C: more than 0.0060% and not more than 0.012%, Si: 0.02% or less, Mn: 0.10% or more and 0.60% or less, P: 0.020% or less, S: 0.020% or less, Al: 0.01% or more and 0.07% or less, and N: 0.0080% or more and 0.0200% or less, with the balance being Fe and inevitable impurities, in which a dislocation density at a depth position of ½ of a sheet thickness from a surface of the steel sheet is 2.0×1014/m2 or more and 1.0×1015/m2 or less.Type: GrantFiled: March 28, 2018Date of Patent: November 17, 2020Assignee: JFE STEEL CORPORATIONInventors: Takashi Ueno, Nobusuke Kariya, Katsumi Kojima, Yoshihide Yamamoto, Akihiro Katagiri
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Publication number: 20200332383Abstract: Provided is a high-strength steel sheet having excellent ductility, bendability, and TS of 500 MPa or more, in particular, a high-strength thin steel sheet for cans having a sheet thickness of 0.1 to 0.8 mm, the steel sheet having a chemical composition containing C: 0.03-0.15%, Si: 0.01-0.05%, Mn: more than 0.6% and 1.5% or less, P: 0.025% or less, S: 0.02% or less, Al: 0.01-0.10%, N: 0.0005-0.0100%, Ti: 0.005-0.020%, B: 0.0005-0.0100%, and Nb: 0.0050-0.0200% with the balance being Fe and inevitable impurities, in which the steel sheet has a metallic structure containing, in area ratio, 85% or more of ferrite and 1-10% of martensite, the martensite has a grain size of 5 ?m or less, and a ratio of martensite having a grain size of 2 ?m or less is 80% or more.Type: ApplicationFiled: October 29, 2018Publication date: October 22, 2020Applicant: JFE STEEL CORPORATIONInventors: Fusae SHIIMORI, Hayato SAITO, Nobusuke KARIYA, Katsumi KOJIMA
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Patent number: 10760142Abstract: Provided are a high-strength steel sheet and a method for manufacturing the steel sheet. The high-strength steel sheet has a specified chemical composition with the balance being Fe and inevitable impurities, a microstructure including, in terms of area ratio, 30% or more of a ferrite phase, 40% to 65% of a bainite phase and/or a martensite phase, and 5% or less of cementite, in which, in a surface layer that is a region within 50 ?m from the surface in the thickness direction, the area ratio of a ferrite phase is 40% to 55% and the total area ratio of a bainite phase having a grain diameter of more than 5 ?m and/or a martensite phase having a grain diameter of more than 5 ?m is 20% or less, and a tensile strength is 980 MPa or more.Type: GrantFiled: August 28, 2015Date of Patent: September 1, 2020Assignee: JFE Steel CorporationInventors: Nobusuke Kariya, Yoshihiko Ono, Yoshimasa Funakawa, Kazuma Mori, Reiko Sugihara, Kenji Kawamura
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Patent number: 10697039Abstract: Provided are a high-strength steel sheet and a method for manufacturing the steel sheet. The high-strength steel sheet has a specified chemical composition with the balance being Fe and inevitable impurities, a microstructure including, in terms of area ratio, 25% or less of a ferrite phase, 75% or more of a bainite phase and/or a martensite phase, and 5% or less of cementite, in which, in a surface layer that is a region within 50 ?m from the surface in the thickness direction, the area ratio of a ferrite phase is 5% to 20%, and a tensile strength is 1180 MPa or more.Type: GrantFiled: August 28, 2015Date of Patent: June 30, 2020Assignee: JFE Steel CorporationInventors: Nobusuke Kariya, Yoshihiko Ono, Yoshimasa Funakawa, Kazuma Mori, Reiko Sugihara, Kenji Kawamura
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Publication number: 20200198844Abstract: A steel sheet for crown cap having excellent formability from which a crown cap having an excellent pressure resistance can be produced without an expensive soft liner even if the steel sheet is subjected to sheet metal thinning, the steel sheet having: a chemical composition containing, in mass %, C: more than 0.006% and 0.012% or less, Si: 0.02% or less, Mn: 0.10% or more and 0.60% or less, P: 0.020% or less, S: 0.020% or less, Al: 0.01% or more and 0.07% or less, and N: 0.0080% or more and 0.0200% or less, with the balance being Fe and inevitable impurities; and a percentage of a region of more than 0% and less than 20% at a position of ½ of a sheet thickness, the region having a dislocation density of 1×1014 m?2 or less.Type: ApplicationFiled: July 25, 2018Publication date: June 25, 2020Applicant: JFE STEEL CORPORATIONInventors: Takashi UENO, Nobusuke KARIYA, Katsumi KOJIMA, Yoshihide YAMAMOTO, Akihiro KATAGIRI
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Publication number: 20200199706Abstract: A steel sheet for crown cap having: a chemical composition containing, C, Si, Mn, P, S, Al, N, with the balance being Fe and inevitable impurities; a ferrite phase in a region from a depth of ¼ of a sheet thickness to a mid-thickness part, the ferrite phase having a standard deviation of ferrite grain size of 7.0 ?m or less; a yield strength of 560 MPa or more and 700 MPa or less in a rolling direction; and a difference of 25 MPa or more between a yield strength in a 2% strain tensile test and a yield strength in a tensile test after heat treatment at 170° C. for 20 minutes, in the rolling direction.Type: ApplicationFiled: July 25, 2018Publication date: June 25, 2020Applicant: JFE STEEL CORPORATIONInventors: Nobusuke KARIYA, Takashi UENO, Yoshihide YAMAMOTO, Katsumi KOJIMA, Bungo TATENO
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Patent number: 10655201Abstract: A high-strength, cold-rolled steel sheet having a tensile strength of 980 MPa or more, the steel sheet having a chemical composition containing, by mass %, C: 0.070% to 0.100%, Si: 0.50% to 0.70%, Mn: 2.40% to 2.80%, P: 0.025% or less, S: 0.0020% or less, Al: 0.020% to 0.060%, N: 0.0050% or less, Nb: 0.010% to 0.060%, Ti: 0.010% to 0.030%, B: 0.0005% to 0.0030%, Sb: 0.005% to 0.015%, Ca: 0.0015% or less, Cr: 0.01% to 2.00%, Mo: 0.01% to 1.00%, Ni: 0.01% to 5.00%, Cu: 0.01% to 5.Type: GrantFiled: February 16, 2016Date of Patent: May 19, 2020Assignee: JFE STEEL CORPORATIONInventors: Nobusuke Kariya, Yoshihiko Ono, Yoshimasa Funakawa, Kazuma Mori, Reiko Sugihara
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Patent number: 10655199Abstract: Provided are a steel sheet, having sufficient strength and formability regardless of reduction of thickness, for crown caps; a method for manufacturing the same; and a crown cap. The steel sheet for crown caps has a composition containing C: 0.0010% to less than 0.0050%, Si: 0.10% or less, Mn: 0.05% to less than 0.50%, P: 0.050% or less, S: 0.050% or less, Al: more than 0.002% to less than 0.070%, N: less than 0.0040%, and B: 0.0005% to 0.0020% on a mass basis, the balance being Fe and inevitable impurities, and also has a yield strength of 500 MPa or more in a rolling direction, an average Lankford value (r) of 1.1 or more, and an in-plane anisotropy (?r) of Lankford value of ?0.3 to 0.3.Type: GrantFiled: January 27, 2016Date of Patent: May 19, 2020Assignee: JFE STEEL CORPORATIONInventors: Takumi Tanaka, Tomonari Hiraguchi, Katsumi Kojima, Hiroki Nakamaru, Nobusuke Kariya
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Publication number: 20200102624Abstract: A steel sheet for a two-piece can, the steel sheet includes: by mass %, C: 0.010% or more and less than 0.030%; Si: 0.04% or less; Mn: 0.10% or more and less than 0.40%; P: 0.02% or less; S: 0.020% or less; Al: more than 0.030% and 0.100% or less; N: 0.0005% or more and less than 0.0030; B: 0.0005% to 0.0030%; and balance Fe and inevitable impurities, wherein an amount of N that is present as BN and a whole amount of N satisfy the following expression (1): [N as BN]/[N]>0.5 ??(1), where N as BN represents the amount of N that is present as BN, and N represents the whole amount of N, a yield point is more than 280 MPa and less than 420 MPa, yield elongation is 3% or less, and ?r is ?0.30 to 0.20.Type: ApplicationFiled: March 12, 2018Publication date: April 2, 2020Applicant: JFE Steel CorporationInventors: Hayato Saito, Nobusuke Kariya, Junichi Kitagawa, Katsumi Kojima
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Publication number: 20200024681Abstract: A steel sheet for a two-piece can, the steel sheet includes: by mass %, C: 0.010% or more and less than 0.050%; Si: 0.04% or less; Mn: 0.10% or more and less than 0.40%; P: 0.02% or less; S:0.020% or less; Al: more than 0.030% and 0.100% or less; N: 0.0005% or more and less than 0.0030%; B: 0.0005% to 0.0030%; and balance Fe and inevitable impurities, wherein an amount of N that is present as BN and a whole amount of N satisfy the following expression (1): [N as BN]/[N]>0.5??(1), where N as BN represents the amount of N that is present as BN, and N represents the whole amount of N, tensile strength is 420 MPa to 540 MPa, elongation is 5% or more, yield elongation is 3% or less, and ?r is ?0.50 to 0.10.Type: ApplicationFiled: March 12, 2018Publication date: January 23, 2020Applicant: JFE Steel CorporationInventors: Hayato Saito, Nobusuke Kariya, Katsumi Kojima
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Publication number: 20200010920Abstract: Provided is a steel sheet having sufficient formability and strength even after sheet metal thinning, the steel sheet including: a chemical composition containing, by mass %, C: more than 0.0060% and not more than 0.012%, Si: 0.02% or less, Mn: 0.10% or more and 0.60% or less, P: 0.020% or less, S: 0.020% or less, Al: 0.01% or more and 0.07% or less, and N: 0.0080% or more and 0.0200% or less, with the balance being Fe and inevitable impurities, in which a dislocation density at a depth position of ½ of a sheet thickness from a surface of the steel sheet is 2.0×1014/m2 or more and 1.0×1015/m2 or less.Type: ApplicationFiled: March 28, 2018Publication date: January 9, 2020Applicant: JFE STEEL CORPORATIONInventors: Takashi UENO, Nobusuke KARIYA, Katsumi KOJIMA, Yoshihide YAMAMOTO, Akihiro KATAGIRI