公开(公告)号：US20190126706A1

公开(公告)日：2019-05-02

申请号：US16231569

申请日：2018-12-23

申请人： NHK SPRING CO., LTD.

发明人： Akira TANGE ,  Hideki OKADA

IPC分类号： B60G11/14 ,  B60G11/16 ,  F16F1/04 ,  C21D7/06

CPC分类号： B60G11/14 ,  B60G11/16 ,  B60G2202/12 ,  B60G2206/42 ,  B60G2206/81 ,  B60G2206/8402 ,  B60G2206/8403 ,  B60G2500/20 ,  C21D7/06 ,  C21D9/02 ,  F16F1/04 ,  F16F2226/02

摘要： A method of manufacturing a suspension coil spring includes forming first shot peening indentations on a surface of a wire by projecting first shots toward the wire and forming a compressive residual stress portion to which a compressive residual stress is imparted from the surface of the wire to a first depth, and projecting ball shots as second shots toward a lower end turn portion by an ultrasonic apparatus. A size of each ball shot is larger than a size of each first shot. The method includes forming second shot peening indentations on a surface of the lower end turn portion, and a deep residual stress portion in the lower end turn portion, a compressive residual stress of the deep residual stress portion imparted from the surface of the wire to a second depth that is deeper than the first depth.

公开(公告)号：US20170349961A1

公开(公告)日：2017-12-07

申请号：US15534470

申请日：2015-12-07

申请人： NHK SPRING CO., LTD.

发明人： Shinichiro KUWATSUKA ,  Yurika OKUDAIRA ,  Akira TANGE ,  Hideki OKADA ,  Ken TAKAHASHI

IPC分类号： C21D9/00 ,  B21D53/88 ,  B24C1/10 ,  C21D1/60 ,  C21D6/00 ,  B21D47/00 ,  C21D8/06 ,  C22C38/00 ,  C22C38/54 ,  C22C38/44 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02 ,  C21D7/06 ,  F16F1/02 ,  F16F1/14 ,  B60G21/055

CPC分类号： C21D9/0068 ,  B21D47/00 ,  B21D53/88 ,  B24C1/10 ,  B60G21/055 ,  B60G2206/724 ,  B60G2206/8103 ,  B60G2206/8402 ,  B60G2206/8403 ,  C21D1/60 ,  C21D6/00 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D7/06 ,  C21D8/06 ,  C21D8/065 ,  C21D9/00 ,  C21D9/0075 ,  C21D9/02 ,  C21D9/08 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54 ,  C22C38/60 ,  F16F1/02 ,  F16F1/021 ,  F16F1/14 ,  F16F2224/0208 ,  F16F2226/00

摘要： The invention provides a production method for stabilizers which produces with high productivity in a compact production line, without tempering. The production method for stabilizers of the invention includes: forming a steel bar material containing at least C: 0.15 wt % to 0.39 wt %, Mn, B and Fe into a product shape by bending; and quenching the bent steel bar material in a medium having a heat transfer coefficient higher than or close to that of water.

公开(公告)号：US09752636B2

公开(公告)日：2017-09-05

申请号：US14427106

申请日：2013-09-05

申请人： NHK SPRING CO., LTD.

发明人： Yuitirou Ono ,  Tohru Shiraishi ,  Yoshiki Ono ,  Keita Takahashi

IPC分类号： F16F1/02 ,  B21F3/02 ,  B21F35/00 ,  C21D7/06 ,  C21D9/02 ,  C23C8/22 ,  C23C8/80 ,  C21D1/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/08 ,  C22C38/12 ,  C22C38/18 ,  B24C1/10 ,  C21D6/00 ,  C21D8/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/34 ,  C22C38/46 ,  C23C8/02 ,  F16F1/06

CPC分类号： F16F1/021 ,  B21F3/02 ,  B21F35/00 ,  B24C1/10 ,  C21D1/06 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D7/06 ,  C21D8/065 ,  C21D9/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/34 ,  C22C38/46 ,  C23C8/02 ,  C23C8/22 ,  C23C8/80 ,  F16F1/06 ,  F16F2224/0216 ,  F16F2226/00 ,  F16F2236/04 ,  F16F2238/026

摘要： The coil spring includes steel wire material containing 0.45 to 0.80 weight % of C, 0.15 to 2.50 weight % of Si, 0.3 to 1.0 weight % of Mn and iron and inevitable impurities as the remainder, and having a circle equivalent diameter of 2.5 mm to 10 mm, in which internal hardness at a freely selected cross section of the wire material is in a range of 570 to 700 Hv, C-condensed layer which exceeds average concentration of C contained in the steel wire material exists at surface layer part, and in an approximate maximum principal stress direction generated when a compressive load is loaded on spring of inner diameter side of the coil spring of the wire material, unloaded compressive residual stress at a depth of 0.2 mm and 0.4 min from surface of the wire material is not less than 200 MPa and not less than 60 MPa, respectively.

公开(公告)号：US20170022580A1

公开(公告)日：2017-01-26

申请号：US15286065

申请日：2016-10-05

申请人： KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)

发明人： Sayaka NAGAMATSU ,  Tomotada MARUO ,  Nao YOSHIHARA

IPC分类号： C21D9/02 ,  C21D8/06 ,  C22C38/54 ,  C22C38/00 ,  C22C38/46 ,  C22C38/42 ,  C22C38/04 ,  C22C38/02 ,  C21D1/02 ,  C22C38/50

CPC分类号： C21D9/02 ,  C21D1/02 ,  C21D7/06 ,  C21D8/065 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/34 ,  C22C38/42 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54

摘要： Provided is a spring steel that contains 0.15-0.40% carbon, 1-3.5% silicon, 0.20-2.0% manganese, 0.05-1.20% chromium, at most 0.030% phosphorus, at most 0.02% sulfur, and at least one of the following: 0.005-0.10% titanium, 0.005-0.05% niobium, and at most 0.25% vanadium. The remainder of said spring steel comprises iron and unavoidable impurities. The carbon equivalent (Ceq1) of the provided spring steel, as calculated by formula (1), is at most 0.55. Ceq1=[C]+0.108×[Si]−0.067×[Mn]+0.024×[Cr]−0.05×[Ni]+0.074×[V]  (1) (In the formula (1), each symbol in brackets represents the content (mass %) of the corresponding element.)

摘要翻译： （式（1）中，括号中的每个符号表示相应元素的含量（质量％）。

公开(公告)号：US20160237518A1

公开(公告)日：2016-08-18

申请号：US15027856

申请日：2014-09-30

申请人： NV BEKAERT SA

发明人： Christophe MESPLONT

IPC分类号： C21D9/02 ,  C22C38/02 ,  C22C38/18 ,  C22C38/04 ,  C21D9/52 ,  C21D8/06

CPC分类号： C21D9/02 ,  B21C1/003 ,  C21D1/25 ,  C21D8/06 ,  C21D8/065 ,  C21D9/52 ,  C21D9/525 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18

摘要： A high tensile strength steel wire having as steel composition: a carbon content ranging from 0.20 weight percent to 1.00 weight percent, e.g. from 0.3 weight percent to 0.85 weight percent, e.g. from 0.4 weight percent to 0.7 weight percent, e.g. from 0.5 weight percent to 0.6 weight percent, a silicon content ranging from 0.05 weight percent to 2.0 weight percent, e.g. from 0.2 weight percent to 1.8 weight percent, e.g. from 1.2 weight percent to 1.6 weight percent, a manganese content ranging from 0.40 weight percent to 1.0 weight percent, e.g. from 0.5 weight percent to 0.9 weight percent, a chromium content ranging from 0.0 weight percent to 1.0 weight percent, e.g. from 0.5 weight percent to 0.8 weight percent, a sulfur and phosphor content being individually limited to 0.05 weight percent, e.g. limited to 0.025 weight percent, contents of nickel, vanadium, aluminum, copper or other micro-alloying elements all being individually limited to 0.5 weight percent, e.g. limited to 0.2 weight percent, e.g. limited to 0.08 weight percent, the remainder being iron, said steel wire having martensitic structure, wherein at least 10 volume percent of martensite are oriented.

摘要翻译： 具有钢组成的高拉伸强度钢丝：碳含量范围为0.20重量％至1.00重量％，例如。 从0.3重量％至0.85重量％，例如。 从0.4重量％至0.7重量％，例如。 0.5重量％至0.6重量％，硅含量范围为0.05重量％至2.0重量％，例如。 从0.2重量％至1.8重量％，例如。 从1.2重量％至1.6重量％，锰含量范围为0.40重量％至1.0重量％，例如。 从0.5重量％至0.9重量％，铬含量范围为0.0重量％至1.0重量％，例如。 从0.5重量％至0.8重量％，硫和磷含量各自限于0.05重量％，例如。 限制为0.025重量％，镍，钒，铝，铜或其他微合金元素的含量均被单独限制为0.5重量％，例如。 限于0.2重量％，例如 限于0.08重量％，其余为铁，所述钢丝具有马氏体组织，其中至少10体积％的马氏体定向。

公开(公告)号：US09341223B2

公开(公告)日：2016-05-17

申请号：US14002798

申请日：2012-03-01

申请人： Takeshi Suzuki ,  Yoshiki Ono ,  Shimpei Kurokawa

发明人： Takeshi Suzuki ,  Yoshiki Ono ,  Shimpei Kurokawa

IPC分类号： F16F1/06 ,  F16F1/02 ,  C21D7/06 ,  C21D9/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/34 ,  B21F35/00

CPC分类号： F16F1/021 ,  B21F35/00 ,  C21D7/06 ,  C21D9/02 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/34 ,  F16F1/06 ,  Y10T29/49609

摘要： A spring with superior fatigue resistance is provided by decreasing the material cost while simplifying the production process. Disclosed is a spring including: a composition consisting of, by mass %, 0.5 to 0.7% of C, 1.0 to 2.0% of Si, 0.1 to 1.0% of Mn, 0.1 to 1.0% of Cr, not more than 0.035% of P, not more than 0.035% of S, and the balance of Fe and impurities; a structure including not less than 95% of tempered martensitic structure; a compressive residual stress layer formed to a depth of 0.35 mm to D/4, in which D (mm) is a diameter; the compressive residual stress layer having maximum compressive residual stress of 800 to 2000 MPa; a center portion with Vickers hardness of 550 to 700 HV; and a high hardness layer with greater hardness than the center portion.

摘要翻译： 通过降低材料成本，同时简化生产过程，提供了具有优异抗疲劳性的弹簧。 公开了一种弹簧，包括以质量％计，C：0.5〜0.7％，Si：1.0〜2.0％，Mn：0.1〜1.0％，Cr：0.1〜1.0％，P：0.035％ ，不大于0.035％的S，余量为Fe和杂质; 包括不低于回火马氏体结构的95％的结构; 形成为深度为0.35mm至D / 4的压缩残余应力层，其中D（mm）为直径; 压缩残余应力层的最大压缩残余应力为800〜2000MPa; 维氏硬度为550至700HV的中心部分; 以及硬度比中心部硬度高的高硬度层。

公开(公告)号：US20160097113A1

公开(公告)日：2016-04-07

申请号：US14874671

申请日：2015-10-05

申请人： DAIDO STEEL CO., LTD.

发明人： Kosuke KIMURA ,  Ryosuke OHASHI ,  Ryohei ISHIKURA

IPC分类号： C22C38/54 ,  C22C38/02 ,  C22C38/04 ,  C22C38/50 ,  C22C38/42

CPC分类号： C22C38/54 ,  C21D1/25 ,  C21D9/02 ,  C21D9/525 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/20 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/40 ,  C22C38/42 ,  C22C38/50

摘要： The present invention relates to a high-strength spring steel having excellent wire-rod rolling properties, consisting essentially of, in terms of mass %: C: 0.40% to 0.65%; Si: 1.20% to 2.80%; Mn: 0.30% to 1.20%; P: 0.020% or less; S: 0.020% or less; Cu: 0.40% or less; Ni: 0.80% or less; Cr: 0.70% or less; Ti: 0.060% to 0.140%; Al: 0.10% or less; N: 0.010% or less; and O: 0.0015% or less, and optionally: B: 0.0005% to 0.0050%, with the remainder being Fe and inevitable impurities, in which the contents in terms of mass % of the specified chemical components satisfy the following Expressions (1) to (3): X1=0.14×[Si]−0.11×[Mn]−0.05×[Cu]−0.11×[Ni]−0.03×[Cr]+0.02≦0.2   Expression (1) X2=(α−500)/β≧3.0   Expression (2) α=912−231×[C]+32×[Si]−20×[Mn]−40×[Cu]−18×[Ni]−15×[Cr] β=10̂(0.322−0.538×[C]+0.018×[Si]+1.294×[Mn]+0.693×[Cu]+0.609×[Ni]+0.847×[Cr]) X3=31×[C]+2.3×[Si]+2.3×[Mn]+1.25×[Cu]+2.68×[Ni]+3.57×[Cr]−6×[Ti]≧24.0   Expression (3).

摘要翻译： 本发明涉及一种具有优异的线棒轧制性能的高强度弹簧钢，其质量基本上由以下组成：质量％：C：0.40％至0.65％; Si：1.20％〜2.80％; Mn：0.30〜1.20％ P：0.020％以下; S：0.020％以下; Cu：0.40％以下; Ni：0.80％以下; Cr：0.70％以下; Ti：0.060〜0.140％ Al：0.10％以下; N：0.010％以下; 和O：0.0015％以下，任选：B：0.0005〜0.0050％，余量为Fe和不可避免的杂质，其中指定化学成分的质量％含量满足下列表达式（1）〜 （3）：X1 = 0.14×[Si] -0.11×[Mn] -0.05×[Cu] -0.11×[Ni] -0.03×[Cr] + 0.02＆nlE; 0.2表达式（1）X2 =（α-500 ）/＆bgr;≥3.0表达式（2）α= 912-231×[C] + 32×[Si] -20×[Mn] -40×[Cu] -18×[Ni] -15×[Cr] ; = 10（0.322-0.538×[C] + 0.018×[Si] + 1.294×[Mn] + 0.693×[Cu] +0.609×[Ni] + 0.847×[Cr]）X3 = 31×[C] + 2.3×[Si] + 2.3×[Mn] + 1.25×[Cu] + 2.68×[Ni] + 3.57×[Cr] -6×[Ti]≥24.0表达式（3）。

公开(公告)号：US09080233B2

公开(公告)日：2015-07-14

申请号：US13635533

申请日：2011-03-23

申请人： Takeshi Suzuki ,  Yoshiki Ono ,  Shimpei Kurokawa

发明人： Takeshi Suzuki ,  Yoshiki Ono ,  Shimpei Kurokawa

IPC分类号： C23C8/26 ,  C23C8/80 ,  C23C8/32 ,  C21D9/02 ,  C22C38/02 ,  C22C38/04 ,  C21D7/06 ,  C21D1/06 ,  C21D1/25

CPC分类号： C23C8/32 ,  C21D1/06 ,  C21D1/25 ,  C21D7/06 ,  C21D9/02 ,  C21D2211/001 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C23C8/80

摘要： A spring consists of, by weight %, 0.27 to 0.48% of C, 0.01 to 2.2% of Si, 0.30 to 1.0% of Mn, not more than 0.035% of P, not more than 0.035% of S, and the balance of Fe and inevitable impurities. The spring has a nitrogen compound layer and a carbon compound layer at the surface at a total thickness of not more than 2 μm. The spring has a center portion with hardness of 500 to 700 HV in a cross section and has a compressive residual stress layer at a surface layer. The compressive residual stress layer has a thickness of 0.30 mm to D/4, in which D (mm) is a circle-equivalent diameter of the cross section, and has maximum compressive residual stress of 1400 to 2000 MPa.

摘要翻译： 弹簧以重量％计，C：0.27〜0.48％，Si：0.01〜2.2％，Mn：0.30〜1.0％，P：0.035％以下，S：0.035％以下，余量： 铁和不可避免的杂质。 弹簧的表面的氮化合物层和碳化合物层的总厚度不大于2μm。 弹簧的横截面为硬度为500〜700HV的中心部，在表层具有压缩残余应力层。 压缩残余应力层的厚度为0.30mm至D / 4，其中D（mm）是横截面的圆当量直径，并且具有1400至2000MPa的最大压缩残余应力。

公开(公告)号：US09068615B2

公开(公告)日：2015-06-30

申请号：US13978321

申请日：2011-08-23

申请人： Takanori Kuno ,  Masami Wakita

发明人： Takanori Kuno ,  Masami Wakita

IPC分类号： F16F1/06 ,  F16F1/02 ,  C21D1/25 ,  C21D7/06 ,  C21D9/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54 ,  F16F1/04

CPC分类号： F16F1/021 ,  C21D1/25 ,  C21D7/06 ,  C21D9/02 ,  C21D2211/001 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54 ,  F16F1/04

摘要： A spring has a Rockwell hardness of HRC 53 to HRC 56 and a dislocation density ρ (cm−2) that satisfies the formula ρ≧1.4×1011×H−6.7×1012 in the Rockwell hardness range of HRC 53 to HRC 56, in which H is the Rockwell hardness. The spring also has a prior austenite grain size number of 10 or higher.

摘要翻译： 弹簧具有HRC 53至HRC 56的洛氏硬度和位错密度rgr; 在HRC 53〜HRC 56的洛氏硬度范围内，满足公式＆rgr;≥1.4×1011×H-6.7×1012的（cm-2），其中H为洛氏硬度。 该弹簧也具有10以上的奥氏体粒径。

公开(公告)号：US20150004051A1

公开(公告)日：2015-01-01

申请号：US14378210

申请日：2013-02-14

申请人： JFE Steel Corporation

发明人： Minoru Honjo ,  Kiyoshi Uwai ,  Shinji Mitao

IPC分类号： C22C38/60 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  F16F1/02 ,  C22C38/20

CPC分类号： C22C38/60 ,  C21D6/008 ,  C21D8/06 ,  C21D9/02 ,  C22C38/002 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  F16F1/021

摘要： A high strength spring steel suppresses ferrite decarburization in a surface layer of a predetermined wire rod manufactured by hot rolling therefrom and possesses excellent decarburization resistance, as compared to conventional high strength spring steel, by optimizing the amount of C, Si, Mn, Cr, Mo and Sb to be added. The spring steel contains, under a certain relationship: 0.35 mass %≦C≦0.45 mass %; 1.75 mass %≦Si≦2.40 mass %; 0.1 mass %≦Mn≦1.0 mass %; 0.01 mass %≦Cr

摘要翻译： 与现有的高强度弹簧钢相比，通过优化C，Si，Mn，Cr等的量，高强度弹簧钢抑制了通过热轧从而制造的预定线材的表层中的铁素体脱碳，具有优异的耐脱碳性， 添加Mo和Sb。 弹簧钢含有一定关系：0.35质量％＆nlE; C＆nlE; 0.45质量％; 1.75质量％＆nlE; Si＆nlE; 2.40质量％ 0.1质量％＆nlE; Mn＆nlE; 1.0质量％ 0.01质量％＆lt; Cr; Cr <0.50质量％ 0.01质量％＆amp; NlE; Mo＆nlE; 1.00质量％ P <0.01; 0.025质量％; S＆nlE; 0.025质量％; 和O <0.01; 0.0015质量％ 和选自0.035质量％以上的Sb和NlE，0.12质量％以及0.035质量％以及SnNiE 0.20质量％中的至少1种。