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公开(公告)号：US06338763B1
公开(公告)日：2002-01-15
申请号：US09407103
申请日：1999-09-27
申请人： Masayuki Hashimura , Hiroshi Hagiwara , Takanari Miyaki , Hiroaki Hayashi , Shoichi Suzuki , Ikuo Ochiai
发明人： Masayuki Hashimura , Hiroshi Hagiwara , Takanari Miyaki , Hiroaki Hayashi , Shoichi Suzuki , Ikuo Ochiai
IPC分类号： C21D902
摘要： This invention provides an oil-tempered wire having high strength (tensile strength of not less than 1960 MPa) and excellent workability and specifically provides a steel wire for high-strength springs comprising as steel components, in weight percent, C 0.4-0.7% Si 1.2-2.5% Mn 0.1-0.5% Cr 0.4-2.0% Al 0.0001-0.005%, and being limited to P not more than 0.015% and S not more than 0.015%, the balance being Fe and unavoidable impurities, the steel wire having no nonmetallic inclusions of a size greater than 15 &mgr;m, a tensile strength of not less than 1960 MPa, and a yield ratio (&sgr;0.2/&sgr;B) of not less than 0.8 and not greater than 0.9 or a yield ratio (&sgr;0.2/&sgr;B) of not less than 0.8 and an amount of residual austenite of not greater than 6%. This invention also provides a method of producing the steel wire.
摘要翻译： 本发明提供一种具有高强度（抗拉强度不低于1960MPa）和优异的加工性的油回火丝，具体提供了一种用于高强度弹簧的钢丝，其包括重量百分比，余量为Fe和不可避免的钢组分 杂质，钢丝不具有大于15μm的非金属夹杂物，拉伸强度不小于1960MPa，屈服比（σ0.2/σB）不小于0.8且不大于0.9或不大于0.9 屈服比（σ0.2/σB）不小于0.8，残余奥氏体量不大于6％。 本发明还提供一种钢丝的制造方法。
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公开(公告)号：US07575646B2
公开(公告)日：2009-08-18
申请号：US10467493
申请日：2002-02-07
申请人： Masayuki Hashimura , Takanari Miyaki , Hiroshi Hagiwara , Hiroaki Hayashi , Shouich Suzuki , Katsuaki Shiiki , Noriyuki Yamada , Seiichi Koike
发明人： Masayuki Hashimura , Takanari Miyaki , Hiroshi Hagiwara , Hiroaki Hayashi , Shouich Suzuki , Katsuaki Shiiki , Noriyuki Yamada , Seiichi Koike
IPC分类号： C22C38/22
摘要： The present invention provides a steel wire, for springs excellent in coiling property while having a high strength, as a heat treated steel wire for high strength springs, characterized by: comprising, in mass, C: 0.75 to 0.85%, Si: 1.5 to 2.5%, Mn: 0.5 to 1.0%, Cr: 0.3 to 1.0%, P: not more than 0.015%, S: not more than 0.015%, N: 0.001 to 0.007%, W: 0.05 to 0.3%, and the balance consisting of Fe and unavoidable impurities; having a tensile strength of not less than 2,000 MPa; spheroidal carbides, composed of mainly cementite, observed in a microscopic visual field satisfying the area percentage of the spheroidal carbides not less than 0.2 μm in circle equivalent diameter being not more than 7%, the density of the spheroidal carbides 0.2 to 3 μm in circle equivalent diameter being not more than 1 piece/μm2, and the density of the spheroidal carbides over 3 μm in circle equivalent diameter being not more than 0.001 piece/μm2; the prior austenite grain size number being #10 or larger; the content of the retained austenite being not more than 12 mass %; the maximum diameter of carbides being not more than 15 μm; and the maximum diameter of oxides being not more than 15 μm.
摘要翻译： 本发明提供一种用于高强度弹簧的热处理钢丝，具有高强度卷取性能优异的弹簧钢丝，其特征在于：以质量计含有C：0.75〜0.85％，Si：1.5〜 2.5％，Mn：0.5〜1.0％，Cr：0.3〜1.0％，P：不大于0.015％，S：不大于0.015％，N：0.001〜0.007％，W：0.05〜0.3％ 由Fe和不可避免的杂质组成; 拉伸强度不小于2000MPa; 球形碳化物主要由渗碳体组成，在满足圆形当量直径不小于0.2μm的球状碳化物的面积百分比的微观视野内观察不超过7％，球形碳化物的密度为0.2-3μm圆 当量直径不大于1件/ mum2，圆形当量直径3毫米以上的球状碳化物的密度不大于0.001件/ mum2; 原奥氏体晶粒数为＃10以上; 残留奥氏体的含量不超过12质量％; 碳化物的最大直径不大于15μm; 氧化物的最大直径不大于15μm。
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公开(公告)号：US07789974B2
公开(公告)日：2010-09-07
申请号：US10362651
申请日：2001-12-20
CPC分类号： B32B27/36 , B32B17/10018 , B32B17/10761 , B32B17/10788 , C21D2211/003 , C22C38/001 , C22C38/002 , C22C38/22 , C22C38/34 , Y10S148/908
摘要： The present invention provides a spring steel having both a high strength and a good coiling property after heat treatment, characterized by: containing, in mass, C: 0.4 to 1.2%, Si: 0.9 to 3.0%, Mn: 0.1 to 2.0%, P: 0.015% or less, S: 0.015% or less, Cr: 2.5% or less, and N: 0.001 to 0.015%, with the balance consisting of Fe and unavoidable impurities; and, in the microstructure of the steel after hot rolling, the density of globular cementite carbides 0.2 to 3 μm in circle-equivalent diameter being 0.5 piece/μm2 or less and the density of globular cementite carbides over 3 μm in circle-equivalent diameter being 0.005 piece/μm2 or less.
摘要翻译： 本发明提供一种在热处理后具有高强度和良好卷取性能的弹簧钢，其特征在于：以质量计含有C：0.4〜1.2％，Si：0.9〜3.0％，Mn：0.1〜2.0％ P：0.015％以下，S：0.015％以下，Cr：2.5％以下，N：0.001〜0.015％，余量由Fe和不可避免的杂质构成。 在热轧后的钢的微观组织中，圆当量直径为0.2〜3μm的球状渗碳体碳化物的密度为0.5片/μm2以下，圆当量直径为3μm以上的球状渗碳体碳化物的密度为 0.005片/μm2以下。
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公开(公告)号：US06406565B1
公开(公告)日：2002-06-18
申请号：US09686032
申请日：2000-10-11
IPC分类号： C22C3828
CPC分类号： C21D9/02 , C21D1/18 , C22C38/001 , C22C38/04 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/50 , C22C38/54 , Y10S148/908
摘要： The present invention provides a spring steel showing a sufficient reduction in area and an impact toughness while the steel has a high strength, in particular a tensile strength as high as at least 1,500 Mpa. A high toughness spring steel according to the present invention comprises, based on mass, 0.45 to 0.85% of C, 0.9 to 2.5% of Si, 0.1 to 1.2% of Mn, 0.1 to 2.0% of Cr, 0.005 to 0.07% of Ti, 0.001 to 0.007% of N, the Ti content being greater than four times the N content in terms of percent by mass, 0.0005 to 0.0060% B, at least one of 0.0005 to 0.01% Mg, 0.0005 to 0.01% La, and 0.0005 to 0.01% Ce, P and S with restrictive contents of less than 0.020% and less than 0.020%, respectively, and the balance of Fe and unavoidable impurities, and selectively contains V, Nb, Ni, Mo and Cu. The percent area of oxides and sulfides is not more than 0.1%.
摘要翻译： 本发明提供了一种弹簧钢，其具有足够的面积减小和冲击韧性，而钢具有高强度，特别是高达至少1,500Mpa的拉伸强度。 根据本发明的高韧性弹簧钢，以质量计含有C：0.45〜0.85％，Si：0.9〜2.5％，Mn：0.1〜1.2％，Cr：0.1〜2.0％，Ti：0.005〜0.07％ ，0.001〜0.007％的N，Ti含量大于N含量的四倍，按质量百分比计，0.0005〜0.0060％B，0.0005〜0.01％的Mg，0.0005〜0.01％的La和0.0005 至0.01％的Ce，P和S，其限制含量分别小于0.020％且小于0.020％，余量为Fe和不可避免的杂质，并选择性地含有V，Nb，Ni，Mo和Cu。 氧化物和硫化物的面积百分比不超过0.1％。
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