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公开(公告)号：US10526675B2
公开(公告)日：2020-01-07
申请号：US15520616
申请日：2015-10-26
发明人： Takuya Kochi , Hitoshi Hatano , Akira Tange , Kiyoshi Kurimoto , Yurika Goto
IPC分类号： C21D9/08 , C22C38/06 , C22C38/02 , C21D6/00 , C22C38/00 , C22C38/18 , C22C38/04 , C21D9/02 , C22C38/50 , C22C38/20 , C22C38/46 , C22C38/42 , C22C38/48 , C22C38/40
摘要： A method for manufacturing steel, by quenching and tempering a seamless pipe for use as a material of a hollow spring, where the seamless pipe including predetermined components is subjected to a heat treatment which is performed to satisfy quenching conditions (1) and tempering conditions (2), (1) quenching conditions: 26,000≤(T1+273)×(log(t1)+20)≤29,000 900° C.≤T1≤1,050° C., 10 seconds≤t1≤1,800 seconds, formula (1) where T1 is a quenching temperature (° C.), and t1 is a holding time (seconds) in a temperature range of 900° C. or higher, and (2) tempering conditions: 13,000≤(T2+273)×(log(t2)+20)≤15,500 T2≤550° C., and t2≤3,600 seconds, formula (2) where T2 is a tempering temperature (° C.), and t2 is a total time (seconds) from start of heating to completion of cooling.
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公开(公告)号：US09429255B2
公开(公告)日：2016-08-30
申请号：US14389866
申请日：2013-04-02
发明人： Takuya Kochi , Hitoshi Hatano , Eiichi Tamura , Kotaro Toyotake , Takashi Yajima , Akira Tange
IPC分类号： B22D19/00 , F16L9/02 , C21D8/10 , C21D9/02 , C21D9/08 , C22C38/00 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/24 , C22C38/28 , C22C38/34 , C22C38/42 , C22C38/46 , C22C38/50 , C21D6/00 , C22C38/02 , C22C38/44 , C22C38/48 , C22C38/54 , F16F1/02
CPC分类号： F16L9/02 , C21D6/008 , C21D8/10 , C21D9/02 , C21D9/08 , C21D2211/004 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/24 , C22C38/28 , C22C38/34 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , F16F1/021
摘要： A hollow seamless pipe for a high-strength spring in the present invention includes a steel material in which chemical component compositions are properly adjusted, wherein a depth of a whole decarburized layer in an inner surface layer part is 100 μm or less, a depth of a flaw which is present in an inner surface is 40 μm or less, a width of the flaw is 60 μm or less, and a number density of a carbide which has a circle equivalent diameter of 500 nm or more and is present in the inner surface layer part is 1.8×10−2 particles/μm2 or less.
摘要翻译： 本发明的高强度弹簧用中空无缝管包括适当调整化学成分组成的钢材，其中，内表面层部的整个脱碳层的深度为100μm以下，深度为 存在于内表面的缺陷为40μm以下，缺陷的宽度为60μm以下，圆当量直径为500nm以上且存在于内侧的碳化物的数密度 表层部分为1.8×10 -2个/μm2以下。
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公开(公告)号：US20150285410A1
公开(公告)日：2015-10-08
申请号：US14389866
申请日：2013-04-02
申请人： KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD) , SHINKO METAL PRODUCTS CO. LTD. , NHK SPRING CO, LTD
发明人： Takuya Kochi , Hitoshi Hatano , Eiichi Tamura , Kotaro Toyotake , Takashi Yajima , Akira Tange
IPC分类号： F16L9/02 , C22C38/54 , C22C38/50 , C22C38/48 , C22C38/46 , C22C38/00 , C22C38/42 , C22C38/34 , C22C38/06 , C22C38/04 , C22C38/02 , F16F1/02 , C22C38/44
CPC分类号： F16L9/02 , C21D6/008 , C21D8/10 , C21D9/02 , C21D9/08 , C21D2211/004 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/24 , C22C38/28 , C22C38/34 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , F16F1/021
摘要： A hollow seamless pipe for a high-strength spring in the present invention includes a steel material in which chemical component compositions are properly adjusted, wherein a depth of a whole decarburized layer in an inner surface layer part is 100 μm or less, a depth of a flaw which is present in an inner surface is 40 μm or less, a width of the flaw is 60 μm or less, and a number density of a carbide which has a circle equivalent diameter of 500 nm or more and is present in the inner surface layer part is 1.8×10−2 particles/μm2 or less.
摘要翻译： 本发明的高强度弹簧用中空无缝管包括适当调整化学成分组成的钢材，其中，内表面层部的整个脱碳层的深度为100μm以下，深度为 存在于内表面的缺陷为40μm以下，缺陷的宽度为60μm以下，圆当量直径为500nm以上且存在于内侧的碳化物的数密度 表层部分为1.8×10 -2个/μm2以下。
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公开(公告)号：US20140377123A1
公开(公告)日：2014-12-25
申请号：US14370877
申请日：2013-02-25
IPC分类号： B23K35/30
CPC分类号： B23K35/3093 , B23K9/025 , B23K9/173 , B23K9/23 , B23K33/004 , B23K35/0255 , B23K35/0266 , B23K35/3053 , B23K35/3066 , B23K35/3073 , B23K35/3086 , B23K2103/04 , C21D2211/001 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/44 , C22C38/50 , C22C38/58
摘要： The present invention is a weld metal formed by gas shielded arc welding using a flux cored wire, the welded metal having a predetermined chemical composition, residual austenite particles being present in an amount of at least 2500 particles/mm2, and the volume fraction of residual austenite particles being at least 4.0%.
摘要翻译： 本发明是使用药芯焊丝通过气体保护电弧焊形成的焊接金属，焊接金属具有预定的化学组成，残余奥氏体颗粒以至少2500个/ mm 2的量存在，并且剩余的体积分数 奥氏体颗粒为至少4.0％。
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公开(公告)号：US09650704B2
公开(公告)日：2017-05-16
申请号：US14407106
申请日：2013-06-11
发明人： Takuya Kochi , Hitoshi Hatano , Eiichi Tamura , Kotaro Toyotake
IPC分类号： C22C38/02 , C22C38/04 , C22C38/18 , C22C38/14 , C22C38/12 , C22C38/54 , C22C38/00 , C22C38/06 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/42 , C22C38/46 , C22C38/50 , C21D9/02 , C21D9/08 , C22C38/20 , C22C38/22
CPC分类号： C22C38/54 , C21D9/02 , C21D9/08 , C21D2211/004 , C21D2211/005 , C21D2211/009 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/42 , C22C38/46 , C22C38/50 , Y10T428/12292
摘要： A seamless steel pipe for a hollow spring includes C: 0.2 to 0.7 mass %, Si: 0.5 to 3 mass %, Mn: 0.1 to 2 mass %, Cr: 3 mass % or less (excluding 0 mass %), Al: 0.1 mass % or less (excluding 0 mass %), P: 0.02 mass % or less (excluding 0 mass %), S: 0.02 mass % or less (excluding 0 mass %) and N: 0.02 mass % or less (excluding 0 mass %). A residual austenite content in an inner surface layer part of the steel pipe is 5 vol. % or less. An average grain size of a ferrite-pearlite structure in the inner surface layer part of the steel pipe is 18 μm or less. A number density of a carbide having a circle equivalent diameter of 500 nm or more and being present in the inner surface layer part of the steel pipe is 1.8×10−2 particles/μm2 or less.
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公开(公告)号：US20150159245A1
公开(公告)日：2015-06-11
申请号：US14407106
申请日：2013-06-11
发明人： Takuya Kochi , Hitoshi Hatano , Eiichi Tamura , Kotaro Toyotake
IPC分类号： C22C38/54 , C22C38/46 , C22C38/42 , C22C38/34 , C22C38/32 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/20 , C22C38/18 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/50
CPC分类号： C22C38/54 , C21D9/02 , C21D9/08 , C21D2211/004 , C21D2211/005 , C21D2211/009 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/42 , C22C38/46 , C22C38/50 , Y10T428/12292
摘要： A seamless steel pipe for a hollow spring includes C: 0.2 to 0.7 mass %, Si: 0.5 to 3 mass %, Mn: 0.1 to 2 mass %, Cr: 3 mass % or less (excluding 0 mass %), Al: 0.1 mass % or less (excluding 0 mass %), P: 0.02 mass % or less (excluding 0 mass %), S: 0.02 mass % or less (excluding 0 mass %) and N: 0.02 mass % or less (excluding 0 mass %). A residual austenite content in an inner surface layer part of the steel pipe is 5 vol. % or less. An average grain size of a ferrite-pearlite structure in the inner surface layer part of the steel pipe is 18 μm or less. A number density of a carbide having a circle equivalent diameter of 500 nm or more and being present in the inner surface layer part of the steel pipe is 1.8×10−2 particles/μm2 or less.
摘要翻译： 中空弹簧用无缝钢管包括C：0.2〜0.7质量％，Si：0.5〜3质量％，Mn：0.1〜2质量％，Cr：3质量％以下（不含0质量％），Al：0.1 质量％以下（不包括0质量％），P：0.02质量％以下（不含0质量％），S：0.02质量％以下（不含O质量％）和N：0.02质量％以下（不含0质量％ ％）。 钢管的内表面层部分的残余奥氏体含量为5体积％。 ％ 或更少。 钢管的内表面层部分的铁素体 - 珠光体组织的平均粒径为18μm以下。 存在于钢管的内表面层部分的圆当量直径为500nm以上的碳化物的数密度为1.8×10 -2个/μm2以下。
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公开(公告)号：US10570478B2
公开(公告)日：2020-02-25
申请号：US15319115
申请日：2015-06-08
申请人： KOBE STEEL, LTD.
发明人： Yuki Sasaki , Takehiro Tsuchida , Takuya Kochi , Koji Yamashita , Masamichi Chiba , Kei Masumoto , Masayuki Sakata
IPC分类号： C22C38/04 , C21D9/52 , C21D8/06 , C22C38/18 , B21B1/22 , C21D6/00 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/20
摘要： Provided is a steel for a mechanical structure for cold working, which contains C, Si, Mn, P, S, Al and N and in which the metal structure includes pearlite and ferrite, the total areal proportion of pearlite and ferrite relative to the overall structure is 90% or higher, the average circle-equivalent diameter of bcc-Fe crystal grains surrounded by large angle grain boundaries is 5-15 μm, the average aspect ratio of pro-eutectoid ferrite crystal grains is 3.0 or lower, and the average spacing at the narrowest pearlite lamellar spacing is 0.20 μm or less.
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公开(公告)号：US09956650B2
公开(公告)日：2018-05-01
申请号：US14370877
申请日：2013-02-25
申请人： Kobe Steel, Ltd.
IPC分类号： B23K35/24 , B23K35/30 , B23K9/173 , B23K9/23 , B23K35/02 , B23K9/025 , B23K33/00 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/44 , C22C38/50 , C22C38/58 , B23K103/04
CPC分类号： B23K35/3093 , B23K9/025 , B23K9/173 , B23K9/23 , B23K33/004 , B23K35/0255 , B23K35/0266 , B23K35/3053 , B23K35/3066 , B23K35/3073 , B23K35/3086 , B23K2103/04 , C21D2211/001 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/44 , C22C38/50 , C22C38/58
摘要： The present invention is a weld metal formed by gas shielded arc welding using a flux cored wire, the welded metal having a predetermined chemical composition, residual austenite particles being present in an amount of at least 2500 particles/mm2, and the volume fraction of residual austenite particles being at least 4.0%.
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