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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: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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