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公开(公告)号：US10308994B2
公开(公告)日：2019-06-04
申请号：US15300810
申请日：2015-03-20
发明人： Yoshikazu Kawabata , Manabu Nishino , Makio Gunji
IPC分类号： C21D9/14 , C21D7/02 , C21D1/18 , C21D1/25 , C21D1/28 , C21D9/08 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/32 , C22C38/38 , F02M61/16 , C21D8/10 , C22C38/00 , C22C38/58 , F02M55/02
摘要： A seamless steel tube has a particular composition and a structure with an average prior γ grain size of 150 μm or less in an axial cross-section after cold drawing and heat treatment. The structure retards the growth of a fatigue crack. The steel tube has a tensile strength TS of 500 MPa or more and good internal pressure fatigue resistance and is suitable for use as a fuel injection tube under high injection pressures. The composition of the steel tube may further contain at least one of Cu, Ni, Cr, Mo, and B; at least one of Ti, Nb, and V; and/or Ca.
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公开(公告)号：US20130098899A1
公开(公告)日：2013-04-25
申请号：US13711942
申请日：2012-12-12
IPC分类号： B21C37/08
CPC分类号： B21C37/08 , B23K13/025 , B23K2101/06 , C21D8/10 , C21D9/50 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , Y10T428/1241
摘要： A method for manufacturing an electric resistance welded steel tube including: forming a steel tube material into an almost cylindrical open pipe, the steel tube material being a steel sheet wherein Ti and N satisfy (N/14)
摘要翻译： 一种电阻焊钢管的制造方法，其特征在于，将钢管材料形成为大致圆筒状的开口管，所述钢管材料为Ti和N满足（N / 14）<（Ti / 47.9）的钢板。 通过控制热输入的感应电阻焊接将开口管的端部彼此接合形成电阻焊钢管，使得焊接宽度为30〜65μm; 将电阻焊钢管加热到等于或高于Ac3转变温度的温度; 并且通过外径比大于（1-25 /直径减小轧制之前的粘合宽度（mum））×100％，使得焊接宽度为25°的直径减小轧制加热的电阻焊钢管 妈妈或更少。
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公开(公告)号：US11332812B2
公开(公告)日：2022-05-17
申请号：US16326420
申请日：2017-10-19
摘要： A method for manufacturing an electric resistance welded steel tube for high-strength thin hollow stabilizers is provided. A steel with a certain chemical composition is heated to a temperature of 1000 to 1300° C., hot rolled under conditions where the rolling finish temperature is 750 to 950° C., cooled, coiled into a coil at 500 to 650° C., and skin pass rolled with a rolling reduction ratio of not less than 0.3%. The resultant hot rolled sheet is electric resistance welded into an electric resistance welded steel tube, which is then reheated to a temperature of 800 to 1100° C. and hot stretch-reducing rolled under conditions where the rolling finish temperature is not more than 850° C. and the cumulative diameter reduction is not more than 75%. Consequently, a thin electric resistance welded steel tube is produced.
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公开(公告)号：US11512361B2
公开(公告)日：2022-11-29
申请号：US16958736
申请日：2018-12-26
发明人： Yoshikazu Kawabata , Makio Gunji
IPC分类号： C21D9/08 , B23K11/087 , B23K31/12 , C21D1/28 , C21D6/00 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/08 , C22C38/20 , C22C38/24 , C22C38/28 , C22C38/32 , C22C38/38 , B23K103/04 , B23K101/06
摘要： Provided is an electric resistance welded steel pipe or tube having excellent fatigue durability after rapid and short-time heating quenching treatment. An electric resistance welded steel pipe or tube comprises: a base metal being a steel sheet having a specific chemical composition and an electric resistance weld portion having a bond width of 40×10−6 m or more and 120×10−6 m or less, wherein C0-C1 is 0.05 mass % or less, where C0-C1 is a difference between C1 in mass % which is a minimum C content of the electric resistance weld portion and C0 in mass % which is a C content of the steel sheet, and a depth of a total decarburized layer in each of an inner surface layer and an outer surface layer of the electric resistance welded steel pipe or tube is 50×10−6 m or less.
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公开(公告)号：US20170022581A1
公开(公告)日：2017-01-26
申请号：US15300810
申请日：2015-03-20
发明人： Yoshikazu Kawabata , Manabu Nishino , Makio Gunji
CPC分类号： C21D9/14 , C21D1/18 , C21D1/25 , C21D1/28 , C21D7/02 , C21D8/10 , C21D8/105 , C21D9/08 , C21D2211/001 , C22C38/00 , C22C38/06 , C22C38/58 , F02M55/02 , F02M61/166 , F02M2200/9053
摘要： A seamless steel tube has a particular composition and a structure with an average prior γ grain size of 150 μm or less in an axial cross-section after cold drawing and heat treatment. The structure retards the growth of a fatigue crack. The steel tube has a tensile strength TS of 500 MPa or more and good internal pressure fatigue resistance and is suitable for use as a fuel injection tube under high injection pressures. The composition of the steel tube may further contain at least one of Cu, Ni, Cr, Mo, and B; at least one of Ti, Nb, and V; and/or Ca.
摘要翻译： 无缝钢管具有特定的组成和在冷拉伸和热处理之后的轴向截面中具有平均先前的γ晶粒尺寸为150μm或更小的结构。 该结构阻碍了疲劳裂纹的增长。 钢管的拉伸强度TS为500MPa以上，内压耐疲劳性良好，适用于高喷射压力下的燃料喷射管。 钢管的组成可以进一步包含Cu，Ni，Cr，Mo和B中的至少一种; Ti，Nb和V中的至少一种; 和/或Ca.
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公开(公告)号：US20210277507A1
公开(公告)日：2021-09-09
申请号：US16326420
申请日：2017-10-19
摘要： A method for manufacturing an electric resistance welded steel tube for high-strength thin hollow stabilizers is provided. A steel with a certain chemical composition is heated to a temperature of 1000 to 1300° C., hot rolled under conditions where the rolling finish temperature is 750 to 950° C., cooled, coiled into a coil at 500 to 650° C., and skin pass rolled with a rolling reduction ratio of not less than 0.3%. The resultant hot rolled sheet is electric resistance welded into an electric resistance welded steel tube, which is then reheated to a temperature of 800 to 1100° C. and hot stretch-reducing rolled under conditions where the rolling finish temperature is not more than 850° C. and the cumulative diameter reduction is not more than 75%. Consequently, a thin electric resistance welded steel tube is produced.
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7.发明授权公开(公告)号：US10301703B2
公开(公告)日：2019-05-28
申请号：US15520159
申请日：2015-10-19
IPC分类号： C21D9/08 , C21D9/50 , C22C38/38 , C22C38/58 , C22C38/00 , B23K26/262 , B23K26/282 , B21B23/00 , B21C37/08 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/42 , C22C38/46 , C22C38/50 , F16L9/17 , B21C37/30 , B23K26/32 , B23K31/02 , C21D8/10 , B23K26/60 , B60R21/261 , B60R21/26 , B23K101/06 , B23K101/16 , B23K103/04
摘要： Disclosed is a high-strength welded steel pipe for airbag inflators that has high toughness and workability. A base material portion of the steel pipe has a composition containing, in mass %, C: 0.02 to 0.08%, Si: 0.001 to 1.0%, Mn: 0.1 to 2.0%, P: 0.1% or less, Al: 0.01 to 0.1%, N: 0.01% or less, Ti: 0.01 to 0.20%, and V: 0.01 to 0.50%, with the balance being Fe and incidental impurities. The base material portion has a structure that includes a ferrite phase having an average grain size of 10 μm or less at an area fraction of 90% or more and a Ti, V-based carbide having an average grain size of 10 nm or less and dispersed in the ferrite phase. The welded steel pipe has a high tensile strength TS of 780 MPa or more and a strength-elongation balance TS×El of 15,000 MPa % or more. The difference ΔHV in Vickers hardness between the base material portion and the welded portion is 60 points or less. In a softened portion having Vickers hardness different from the Vickers hardness of the base material portion by at least 30 points, a softened width Ws in a circumferential direction is 0.05 mm or less.
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8.发明申请公开(公告)号：US20180023163A1
公开(公告)日：2018-01-25
申请号：US15520159
申请日：2015-10-19
IPC分类号： C21D9/50 , B21C37/08 , B21B23/00 , B23K26/282 , C21D9/08 , C22C38/42 , C22C38/50 , C22C38/46 , C22C38/28 , C22C38/24 , C22C38/26 , C22C38/20 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , F16L9/17
CPC分类号： C21D9/50 , B21B23/00 , B21C37/08 , B21C37/30 , B23K26/262 , B23K26/282 , B23K26/32 , B23K26/60 , B23K31/027 , B23K2101/06 , B23K2101/16 , B23K2103/04 , B60R21/26 , B60R21/261 , B60R2021/2612 , C21D8/105 , C21D9/08 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/38 , C22C38/42 , C22C38/46 , C22C38/50 , F16L9/17
摘要： Disclosed is a high-strength welded steel pipe for airbag inflators that has high toughness and workability. A base material portion of the steel pipe has a composition containing, in mass %, C: 0.02 to 0.08%, Si: 0.001 to 1.0%, Mn: 0.1 to 2.0%, P: 0.1% or less, Al: 0.01 to 0.1%, N: 0.01% or less, Ti: 0.01 to 0.20%, and V: 0.01 to 0.50%, with the balance being Fe and incidental impurities. The base material portion has a structure that includes a ferrite phase having an average grain size of 10 μm or less at an area fraction of 90% or more and a Ti, V-based carbide having an average grain size of 10 nm or less and dispersed in the ferrite phase. The welded steel pipe has a high tensile strength TS of 780 MPa or more and a strength-elongation balance TS×El of 15,000 MPa % or more. The difference ΔHV in Vickers hardness between the base material portion and the welded portion is 60 points or less. In a softened portion having Vickers hardness different from the Vickers hardness of the base material portion by at least 30 points, a softened width Ws in a circumferential direction is 0.05 mm or less.
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公开(公告)号：US09862014B2
公开(公告)日：2018-01-09
申请号：US13711942
申请日：2012-12-12
IPC分类号： B23K11/00 , B23K13/01 , B21C37/08 , B23K13/02 , C21D8/10 , C21D9/50 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , B23K101/06
CPC分类号： B21C37/08 , B23K13/025 , B23K2101/06 , C21D8/10 , C21D9/50 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , Y10T428/1241
摘要： A method for manufacturing an electric resistance welded steel tube including: forming a steel tube material into an almost cylindrical open pipe, the steel tube material being a steel sheet wherein Ti and N satisfy (N/14)
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