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    Heat-treated steel wire for high strength spring
    1.
    发明授权
    Heat-treated steel wire for high strength spring 有权
    用于高强度弹簧的热处理钢丝

    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

    CPC分类号： C22C38/24 ,  C21D6/008 ,  C21D9/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/34

    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。

    Steel wire for high-strength springs and method of producing the same
    2.
    发明授权
    Steel wire for high-strength springs and method of producing the same 有权
    高强度弹簧用钢丝及其制造方法

    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

    CPC分类号： C22C38/34 ,  C21D1/18 ,  C21D9/525 ,  C22C38/06 ,  C22C38/44 ,  C22C38/46 ,  Y10S148/908

    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。

    High-strength spring steel wire
    3.
    发明授权
    High-strength spring steel wire 有权
    高强度弹簧钢丝

    公开(公告)号：US07789974B2

    公开(公告)日：2010-09-07

    申请号：US10362651

    申请日：2001-12-20

    申请人： Masayuki Hashimura ,  Hiroshi Hagiwara ,  Takanari Miyaki

    发明人： Masayuki Hashimura ,  Hiroshi Hagiwara ,  Takanari Miyaki

    IPC分类号： C22C38/18 ,  C22C38/34

    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。

    High toughness spring steel
    4.
    发明授权
    High toughness spring steel 有权
    高韧性弹簧钢

    公开(公告)号：US06406565B1

    公开(公告)日：2002-06-18

    申请号：US09686032

    申请日：2000-10-11

    申请人： Masayuki Hashimura ,  Hiroshi Hagiwara ,  Takanari Miyaki ,  Toshio Banno

    发明人： Masayuki Hashimura ,  Hiroshi Hagiwara ,  Takanari Miyaki ,  Toshio Banno

    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％。

    High strength spring-use heat treated steel
    6.
    发明申请
    High strength spring-use heat treated steel 有权
    高强度弹簧使用热处理钢

    公开(公告)号：US20090092516A1

    公开(公告)日：2009-04-09

    申请号：US11919735

    申请日：2007-03-29

    申请人： Masayuki Hashimura ,  Tatsuro Ochi ,  Takayuki Kisu ,  Hiroshi Hagiwara

    发明人： Masayuki Hashimura ,  Tatsuro Ochi ,  Takayuki Kisu ,  Hiroshi Hagiwara

    IPC分类号： C22C38/22 ,  C22C38/16 ,  C22C38/02 ,  C22C38/00 ,  C22C38/18

    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]。

    High strength spring steel and steel wire
    7.
    发明授权
    High strength spring steel and steel wire 有权

    公开(公告)号：US10131973B2

    公开(公告)日：2018-11-20

    申请号：US11630222

    申请日：2005-11-30

    申请人： Masayuki Hashimura ,  Hiroshi Hagiwara ,  Takanori Miyaki ,  Takayuki Kisu ,  Kouichi Yamazaki

    发明人： Masayuki Hashimura ,  Hiroshi Hagiwara ,  Takanori Miyaki ,  Takayuki Kisu ,  Kouichi Yamazaki

    IPC分类号： C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/28 ,  C21D8/06 ,  C21D9/52

    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.

    High strength spring-use heat treated steel
    8.
    发明申请
    High strength spring-use heat treated steel 审中-公开
    高强度弹簧使用热处理钢

    公开(公告)号：US20090205753A1

    公开(公告)日：2009-08-20

    申请号：US11918997

    申请日：2007-03-29

    申请人： Masayuki Hashimura ,  Tatsurou Ochi ,  Takayuki Kisu ,  Hiroshi Hagiwara

    发明人： Masayuki Hashimura ,  Tatsurou Ochi ,  Takayuki Kisu ,  Hiroshi Hagiwara

    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。