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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：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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