DRAWN HEAT TREATED STEEL WIRE FOR HIGH STRENGTH SPRING USE AND PRE-DRAWN STEEL WIRE FOR HIGH STRENGTH SPRING USE
    5.
    发明申请
    DRAWN HEAT TREATED STEEL WIRE FOR HIGH STRENGTH SPRING USE AND PRE-DRAWN STEEL WIRE FOR HIGH STRENGTH SPRING USE 审中-公开
    用于高强度弹簧使用的热处理钢丝和用于高强度弹簧使用的预制钢丝

    公开(公告)号:US20120291927A1

    公开(公告)日:2012-11-22

    申请号:US13574175

    申请日:2011-07-05

    摘要: Drawn heat treated steel wire for high strength spring use is provided containing, by mass %, C: 0.67% to less than 0.9%, Si: 2.0 to 3.5%, Mn: 0.5 to 1.2%, Cr: 1.3 to 2.5%, N: 0.003 to 0.007%, and Al: 0.0005% to 0.003%, having Si and Cr satisfying the following formula: 0.3%≦Si−Cr≦1.2%, and having a balance of iron and unavoidable impurities, having as impurities, P: 0.025% or less and S: 0.025% or less, furthermore having a circle equivalent diameter of undissolved spherical carbides of less than 0.2 μm, further having, as a metal structure, at least residual austenite in a volume rate of over 6% to 15%, having a prior austenite grain size number of #10 or more, and having a circle equivalent diameter of undissolved spherical carbides of less than 0.2 μm.

    摘要翻译: 提供了用于高强度弹簧使用的拉丝热处理钢丝,以质量%计含有C:0.67%至小于0.9%,Si:2.0-3.5%,Mn:0.5-1.2%,Cr:1.3-2.5%,N :0.003〜0.007%,Al:0.0005〜0.003%,Si和Cr满足下​​式:0.3%≦̸ Si-Cr≦̸ 1.2%,余量为铁和不可避免的杂质,杂质为P :0.025%以下,S:0.025%以下,还具有小于0.2μm的未溶解球形碳化物的当量圆直径,作为金属结构,至少残留奥氏体的体积率超过6%以上〜 15%,具有#10以上的前奥氏体晶粒数,并且具有小于0.2μm的未溶解球形碳化物的圆当量直径。

    HIGH STRENGTH STEEL WIRE FOR SPRING
    6.
    发明申请
    HIGH STRENGTH STEEL WIRE FOR SPRING 有权
    高强度钢丝弹簧

    公开(公告)号:US20120125489A1

    公开(公告)日:2012-05-24

    申请号:US13261124

    申请日:2010-07-09

    IPC分类号: C22C38/22

    摘要: High strength steel wire for spring containing, by mass %, C: 0.67% to less than 0.75%, Si: 2.0 to 2.5%, Mn: 0.5 to 1.2%, Cr: 0.8 to 1.3%, V: 0.03 to 0.20%, Mo: 0.05 to 0.25%, W: 0.05 to 0.30%, and N: 0.003 to 0.007%, having a total of contents of Mn and V of 0.70%≦Mn+V≦1.27% and a total of contents of Mo and W of 0.13%≦Mo+W≦0.35%, limiting P: 0.025% or less, S: 0.025% or less, and Al: 0.003% or less, and having a balance of iron and unavoidable impurities, having a microstructure comprised of, by volume percent, over 6% to 15% of retained austenite and tempered martensite, having a prior-austenite grain size number of 10 or more, having a density of presence of spheroidal carbides with a circle equivalent diameter of 0.2 to 0.5 μm of 0.06 particles/μm2 or less, having a density of presence of spheroidal carbides with a circle equivalent diameter of over 0.5 μm of 0.01 particles/μm2 or less, and having a tensile strength of 2100 to 2350 MPa.

    摘要翻译: 弹性高强度钢丝以质量%计含有C:0.67〜小于0.75%,Si:2.0〜2.5%,Mn:0.5〜1.2%,Cr:0.8〜1.3%,V:0.03〜0.20% Mo:0.05〜0.25%,W:0.05〜0.30%,N:0.003〜0.007%,总Mn含量分别为0.70%,nlE,Mn + V&nlE,1.27%,Mo和 W:0.13%< NlE; Mo + W≦̸ 0.35%,限制P:0.025%以下,S:0.025%以下,Al:0.003%以下,余量为铁和不可避免的杂质, 的奥氏体和回火马氏体的超过6%至15%的奥氏体晶粒度为10以上,具有圆当量直径为0.2〜0.5μm的球形碳化物的密度 0.06粒子/μm2以下,具有0.01当量/μm2以下的圆当量直径超过0.5μm的球状碳化物的密度,并且拉伸强度为2100〜2350MPa。

    High-strength spring steel wire
    9.
    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

    IPC分类号: C22C38/18 C22C38/34

    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。

    MARTENSITE TYPE HOT FORGING USE NON HEAT-TREATED STEEL AND HOT FORGED NON HEAT-TREATED STEEL PART
    10.
    发明申请
    MARTENSITE TYPE HOT FORGING USE NON HEAT-TREATED STEEL AND HOT FORGED NON HEAT-TREATED STEEL PART 有权
    马氏体型热锻使用非热处理钢和热锻非热处理钢部件

    公开(公告)号:US20100183473A1

    公开(公告)日:2010-07-22

    申请号:US12311821

    申请日:2008-10-27

    摘要: The present invention provides hot forging use non heat-treated steel where controlled cooling after shaping by hot forging is used to make the main structure of the steel martensite even without subsequent reheating and heat treatment by quenching and tempering and thereby give a steel part with a high strength and high toughness and superior machineability and a hot forged non heat-treated steel part made of that steel, in particular provides a martensite type hot forging use non heat-treated steel characterized by containing, by mass %, C: 0.10 to 0.20%, Si: 0.10 to 0.50%, Mn: 1.0 to 3.0%, P: 0.001 to 0.1%, S: 0.005 to 0.8%, Cr: 0.10 to 1.50%, Al: over 0.1 to 0.20%, and N: 0.0020 to 0.0080% and having a balance of substantially Fe and unavoidable impurities and a hot forged non heat-treated steel part made of such steel and characterized in that the steel structure of the entire cross-section at part or all of that part is substantially a martensite structure with an effective crystal grain size of 15 μm or less.

    摘要翻译: 本发明提供热锻造用非热处理钢,其中通过热锻造成型后的受控冷却用于制造钢马氏体的主要结构,即使不进行后续的再加热和淬火回火的热处理,从而使钢部分具有 高强度,高韧性,优异的加工性以及由该钢制成的热锻非热处理钢部件,特别是提供一种马氏体型热锻用非热处理钢,其特征在于以质量%计含有C:0.10〜0.20 %,Si:0.10〜0.50%,Mn:1.0〜3.0%,P:0.001〜0.1%,S:0.005〜0.8%,Cr:0.10〜1.50%,Al:0.1〜0.20%,N:0.0020〜 0.0080%,余量基本上为Fe和不可避免的杂质,以及由这种钢制成的热锻非热处理钢部件,其特征在于,该部分或全部的整个截面的钢结构基本上是马氏体 结构有效结晶 粒径为15μm以下。