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公开(公告)号：US10131973B2
公开(公告)日：2018-11-20
申请号：US11630222
申请日：2005-11-30
摘要： The present invention provides spring steel used for spring steel wire achieving both high strength and cold coilability and spring steel wire, that is, spring steel containing, by mass %, C: 0.45 to 0.70%, Si: 1.0 to 3.0%, Mn: 0.05 to 2.0%, P: 0.015% or less, S: 0.015% or less, N: 0.0015 to 0.0200%, and t-O: 0.0002 to 0.01 and further limiting Al≤0.01% and Ti≤0.003%. Further, it is characterized by satisfying the following regarding the cementite-based spherical carbides present at an observed plane, an occupied area ratio of grains with a circle equivalent diameter of 0.2 μm or more of 7% or less, a density of presence of grains with a circle equivalent diameter of 0.2 to 3 μm of 1/μm2 or less, and a density of presence of grains with a circle equivalent diameter 3 μm or more of 0.001/μm2 or less, having an prior austenite grain size number of #10 or higher and a residual austenite of 15 mass % or less, and having an area ratio of poor regions with a small density of presence of cementite-based carbides of a circle equivalent diameter of 2 μm or more of 3% or less.
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公开(公告)号：US20080279714A1
公开(公告)日：2008-11-13
申请号：US11630222
申请日：2005-11-30
CPC分类号： C22C38/04 , C21D8/06 , C21D9/525 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/22 , C22C38/28
摘要： The present invention provides spring steel used for spring steel wire achieving both high strength and cold coilability and spring steel wire, that is, spring steel containing, by mass %, C: 0.45 to 0.70%, Si: 1.0 to 3.0%, Mn: 0.05 to 2.0%, P: 0.015% or less, S: 0.015% or less, N: 0.0015 to 0.0200%, and t-O: 0.0002 to 0.01 and further limiting Al≦0.01% and Ti≦0.003%. Further, it is characterized by satisfying the following regarding the cementite-based spherical carbides present at an observed plane, an occupied area ratio of grains with a circle equivalent diameter of 0.2 μm or more of 7% or less, a density of presence of grains with a circle equivalent diameter of 0.2 to 3 μm of 1/μm2 or less, and a density of presence of grains with a circle equivalent diameter 3 μm or more of 0.001/μm2 or less, having an prior austenite grain size number of #10 or higher and a residual austenite of 15 mass % or less, and having an area ratio of poor regions with a small density of presence of cementite-based carbides of a circle equivalent diameter of 2 μm or more of 3% or less.
摘要翻译： 本发明提供弹簧钢用于高强度，低温卷取性的弹簧钢和弹簧钢丝，即以质量％计含有C：0.45〜0.70％，Si：1.0〜3.0％，Mn： 0.05〜2.0％，P：0.015％以下，S：0.015％以下，N：0.0015〜0.0200％，t0：0.0002〜0.01，进一步限制Al <0.01％，Ti <0.003％。 此外，其特征在于，在观察平面上存在的渗碳体系球状碳化物，圆当量直径为0.2μm以上的晶粒的占有面积比为7％以下，粒子的存在密度 圆当量直径为0.2〜3μm1 /μm2以下，圆当量直径为3μm以上的颗粒的存在密度为0.001 / 以上，奥氏体晶粒数为＃10以上，残留奥氏体为15质量％以下，并且具有密度低的渗碳体系碳化物的区域的面积比为 圆当量直径2μm以上3％以下。
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3.发明申请High Strength Spring Steel and High Strength Heat Treated Steel Wire for Spring 审中-公开高强度弹簧钢和高强度热处理钢丝弹簧公开(公告)号：US20100028196A1
公开(公告)日：2010-02-04
申请号：US11794414
申请日：2006-11-09
申请人： Masayuki Hashimura , Hiroshi Hagiwara , Takayuki Kisu , Kouichi Yamazaki , Tatsuroi Ochi , Takashi Fujita
发明人： Masayuki Hashimura , Hiroshi Hagiwara , Takayuki Kisu , Kouichi Yamazaki , Tatsuroi Ochi , Takashi Fujita
IPC分类号： C22C38/22 , C22C38/04 , C22C38/20 , C22C38/24 , C22C38/26 , C22C38/60 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50
摘要： The present invention provides a high strength heat treated steel wire for spring having a tensile strength of 2000 MPa or more which is coiled in the cold state and can achieve both sufficient atmospheric strength and coilability and spring steel used for that steel wire, that is, a high strength heat treated steel wire for a spring characterized by comprising, by mass %, C: 0.5 to 0.9%, Si: 1.0 to 3.0%, Mn: 0.1 to 1.5%, Cr: 1.0 to 2.5%, V: over 0.15 to 1.0%, and Al: 0.005% or less, controlling N to 0.007% or less, further containing one or two of Nb: 0.001 to less than 0.01% and Ti: 0.001 to less 0.005%, and having a tensile strength of 2000 MPa or more, having cementite-based spheroidal carbides and alloy-based spheroidal carbides in a microscopic visual field satisfying an area percentage of carbides with a circle equivalent diameter of 0.2 μm or more of 7% or less and a density of carbides with a circle equivalent diameter of 1 grain/μm2 or less, having a prior austenite grain size number of #10 or more, and having retained austenite of 15 mass % or less.
摘要翻译： 本发明提供一种用于弹簧的高强度热处理钢丝，其拉伸强度为2000MPa以上，其被卷绕在冷态中，并且可以获得足够的大气强度和线性，以及用于该钢丝的弹簧钢，即， 用于弹簧的高强度热处理钢丝，其特征在于以质量％计含有C：0.5〜0.9％，Si：1.0〜3.0％，Mn：0.1〜1.5％，Cr：1.0〜2.5％，V：0.15以上 至1.0％，Al：0.005％以下，控制为N = 0.007％以下，进一步含有Nb：0.001〜0.01％以下，Ti：0.001〜0.005％以下，拉伸强度为2000 MPa以上，在微观视场中具有渗碳体系球状碳化物和合金系球状碳化物，其满足圆当量直径为0.2μm以上的碳化物的面积百分比为7％以下，碳化物的密度为圆 当量直径为1粒/ m 2或更小，具有先前的奥氏体晶粒s ＃10以上，残留奥氏体为15质量％以下。
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公开(公告)号：US08845825B2
公开(公告)日：2014-09-30
申请号：US11919735
申请日：2007-03-29
IPC分类号： C22C38/08 , C23C8/20 , C23C8/24 , C23C8/00 , C23C8/26 , C23C8/50 , C23C22/00 , C22C38/16 , C22C33/00 , C22C38/60 , C22C38/02 , C22C38/18 , C21D9/52 , C22C38/34 , C22C38/04 , C22C38/00
CPC分类号： C21D9/52 , C21D1/18 , C21D2211/008 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/18 , C22C38/34 , C22C38/60 , Y02P10/212
摘要： The present invention provides spring use heat treated steel which is cold coiled, can achieve both sufficient atmospheric strength and coilability, has a tensile strength of 2000 MPa or more, and can improve the performance as a spring by heat treatment after spring fabrication, that is, high strength spring-use heat treated steel characterized by containing, by mass %, C: 0.45 to 0.9%, Si: 1.7 to 3.0%, and Mn: 0.1 to 2.0%, restricting N: to 0.007% or less, having a balance of Fe and unavoidable impurities, and satisfying, in terms of the analyzed value of the extracted residue after heat treatment, [amount of Fe in residue on 0.2 μm filter/[steel electrolysis amount]×100≦1.1.
摘要翻译： 本发明提供一种冷卷绕弹簧使用的热处理钢，能够实现充分的大气强度和线性化，拉伸强度为2000MPa以上，并且可以通过弹簧加工后的热处理提高作为弹簧的性能，即 特征在于，以质量％计含有C：0.45〜0.9％，Si：1.7〜3.0％，Mn：0.1〜2.0％的高强度弹簧用热处理钢，其特征在于，将N：0.007％以下， 平衡Fe和不可避免的杂质，并且，对于热处理后的提取残渣的分析值来说，[0.2μm过滤器上残渣中的Fe量[[钢电解量]×100＆nlE; 1.1]。
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公开(公告)号：US20090205753A1
公开(公告)日：2009-08-20
申请号：US11918997
申请日：2007-03-29
IPC分类号： C22C38/02
CPC分类号： C21D9/525 , C21D1/25 , C21D2211/008 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/60 , Y02P10/212
摘要： The present invention provides spring-use heat treated steel which is cold coiled, can achieve both sufficient atmospheric strength and coiling workability, has a tensile strength of 2000 MPa or more, and can improve the performance as a spring by heat treatment after shaping the spring, that is, heat treated steel for high strength spring containing, by mass %, C: 0.45 to 0.9%, Si: 1.0 to 3.0%, Mn: 0.1 to 2.0%, V: over 0.1 to 1.0%, N: limited to 0.007% or less, and a balance of Fe and unavoidable impurities, and satisfying, in terms of the analyzed value of the extracted residue after heat treatment, [amount of V in filtrate filtered by 0.2 μm filter (mass %)]≧[amount of V in steel (mass %)]×0.4.
摘要翻译： 本发明提供一种冷卷绕弹簧用热处理钢，能够获得足够的大气强度和卷取加工性，拉伸强度为2000MPa以上，并且能够在成形弹簧后通过热处理提高作为弹簧的性能 即，以质量％计含有C：0.45〜0.9％，Si：1.0〜3.0％，Mn：0.1〜2.0％，V：0.1〜1.0％以下的高强度弹簧用热处理钢，N：限于 0.007％以下，余量由Fe和不可避免的杂质构成，从热处理后的提取残渣的分析值来看，[0.2μm过滤器过滤的滤液中的V量（质量％）] = [ 钢中V含量（质量％）]×0.4。
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公开(公告)号：US20090092516A1
公开(公告)日：2009-04-09
申请号：US11919735
申请日：2007-03-29
CPC分类号： C21D9/52 , C21D1/18 , C21D2211/008 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/18 , C22C38/34 , C22C38/60 , Y02P10/212
摘要： The present invention provides spring use heat treated steel which is cold coiled, can achieve both sufficient atmospheric strength and coilability, has a tensile strength of 2000 MPa or more, and can improve the performance as a spring by heat treatment after spring fabrication, that is, high strength spring-use heat treated steel characterized by containing, by mass %, C: 0.45 to 0.9%, Si: 1.7 to 3.0%, and Mn: 0.1 to 2.0%, restricting N: to 0.007% or less, having a balance of Fe and unavoidable impurities, and satisfying, in terms of the analyzed value of the extracted residue after heat treatment, [amount of Fe in residue on 0.2 μm filter/[steel electrolysis amount]×100≦1.1.
摘要翻译： 本发明提供一种冷卷绕弹簧使用的热处理钢，能够实现充分的大气强度和线性化，拉伸强度为2000MPa以上，并且可以通过弹簧加工后的热处理提高作为弹簧的性能，即 特征在于，以质量％计含有C：0.45〜0.9％，Si：1.7〜3.0％，Mn：0.1〜2.0％的高强度弹簧用热处理钢，其特征在于，将N：0.007％以下， Fe和不可避免的杂质的平衡，从热处理后的提取残渣的分析值来说，[0.2mum过滤器上残留物中的Fe量[[钢电解量]×100 <= 1.1]。
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公开(公告)号：US08137484B2
公开(公告)日：2012-03-20
申请号：US12288542
申请日：2008-10-20
申请人： Masayuki Hashimura , Atsushi Mizuno , Kenichiro Naito , Hiroshi Hagiwara , Kohichi Isobe , Hiroshi Hirata
发明人： Masayuki Hashimura , Atsushi Mizuno , Kenichiro Naito , Hiroshi Hagiwara , Kohichi Isobe , Hiroshi Hirata
CPC分类号： C22C38/001 , C21D2211/005 , C21D2211/009 , C22C38/002 , C22C38/04 , C22C38/60
摘要： The present invention provides steel superior in machinability comprised of, by wt %, C: 0.005 to 0.2%, Si: 0.001 to 0.5%, Mn: 0.2 to 3.0%, P: 0.001 to 0.2%, S: 0.03 to 1.0%, T.N: 0.002 to 0.02%, T.O: 0.0005 to 0.035%, and the balance of Fe and unavoidable impurities, said steel satisfying one or both of Mn/S in the steel being 1.2 to 2.8 or an area ratio of pearlite over a grain size of 1 μm in a microstructure of the steel being not more than 5%.
摘要翻译： 本发明提供了以C：0.005〜0.2％，Si：0.001〜0.5％，Mn：0.2〜3.0％，P：0.001〜0.2％，S：0.03〜1.0％，重量％ TN：0.002〜0.02％，TO：0.0005〜0.035％，余量由Fe和不可避免的杂质构成，所述钢满足钢中Mn / S的一种或两种或1.2或2.8，或珠光体相对于晶粒尺寸的面积比 在钢的微观结构中为1μm以下，不超过5％。
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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：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：US20090050241A1
公开(公告)日：2009-02-26
申请号：US12288542
申请日：2008-10-20
申请人： Masayuki Hashimura , Atsushi Mizuno , Kenichiro Naito , Hiroshi Hagiwara , Kohichi Isobe , Hiroshi Hirata
发明人： Masayuki Hashimura , Atsushi Mizuno , Kenichiro Naito , Hiroshi Hagiwara , Kohichi Isobe , Hiroshi Hirata
IPC分类号： C21D6/00
CPC分类号： C22C38/001 , C21D2211/005 , C21D2211/009 , C22C38/002 , C22C38/04 , C22C38/60
摘要： The present invention provides steel superior in machinability comprised of, by wt %, C: 0.005 to 0.2%, Si: 0.001 to 0.5%, Mn: 0.2 to 3.0%, P: 0.001 to 0.2%, S: 0.03 to 1.0%, T.N: 0.002 to 0.02%, T.O: 0.0005 to 0.035%, and the balance of Fe and unavoidable impurities, said steel satisfying one or both of Mn/S in the steel being 1.2 to 2.8 or an area ratio of pearlite over a grain size of 1 μm in a microstructure of the steel being not more than 5%.
摘要翻译： 本发明提供了以C：0.005〜0.2％，Si：0.001〜0.5％，Mn：0.2〜3.0％，P：0.001〜0.2％，S：0.03〜1.0％，重量％ TN：0.002〜0.02％，TO：0.0005〜0.035％，余量由Fe和不可避免的杂质构成，所述钢满足钢中Mn / S的一种或两种或1.2或2.8，或珠光体的晶粒面积比 1微米的钢的微观结构不大于5％。
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