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1. 发明授权

US11466334B2 Nitrogen-containing microalloyed spring steel and preparation method thereof 有权
公开(公告)号：US11466334B2
公开(公告)日：2022-10-11
申请号：US16642509
申请日：2018-04-08
申请人： Shandong Automobile Spring Factory Zibo Co., Ltd. , Shandong Lianmei Springs Technology Corporation
发明人： Simon Yisheng Feng , Zhenghong Wang
IPC分类号： C21D9/02 , C21D6/00 , C22C33/04 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/44 , C22C38/46 , C22C38/48
摘要： A nitrogen-containing microalloyed spring steel and a preparation method thereof are provided. The chemical components are: 0.45-0.52% of carbon, 0.15-0.35% of silicon, 0.90-1.10% of manganese, 0.90-1.15% of chromium, 0.10-0.25% of molybdenum, 0.10-0.20% of vanadium, 0.025-0.04% of niobium, 0.007-0.012% of nitrogen, less than or equal to 0.03% of lead, tin, zinc, antimony, and bismuth, less than or equal to 25 ppm of oxygen and hydrogen, less than or equal to 0.02% of sulfur and phosphorus, less than or equal to 0.2% of copper, less than or equal to 0.35% nickel, and a balance of iron. The spring steel has significantly improved properties, including high mechanical strength, large elongation, high reduction of area, and good anti-fatigue performance.

2. 发明申请

US20220226880A1 METHOD FOR MAKING A SPRING CORE FOR A MATTRESS OR FOR SEATING PRODUCTS 有权
公开(公告)号：US20220226880A1
公开(公告)日：2022-07-21
申请号：US17608522
申请日：2020-03-26
申请人： NV BEKAERT SA
发明人： Bert VANDERBEKEN
IPC分类号： B21F27/16 , C21D9/02 , C21D8/00 , C21D6/00 , C22C38/18 , C22C38/02 , C22C38/06 , B21F33/04 , B68G9/00
摘要： A method to manufacture a steel wire spring core for a mattress or for seating is described, which comprises the steps of providing a carrier comprising steel wire; repeatedly cold coiling a steel wire spring from steel wire taken from the carrier; and connecting a series of the coiled steel wire springs to each other. The steel wire has a diameter d between 0.8 and 4.5 mm; and has a drawn pearlitic microstructure. The steel wire comprises a steel alloy having a carbon content between 0.35 wt % and 0.85 wt %. The steel wire on the carrier has a ratio—expressed as a percentage—of the yield strength Rpo 2 (in MPa) over the tensile strength Rm (in MPa) higher than 85%.

3. 发明授权

US10995382B2 Production method for stabilizers 有权
公开(公告)号：US10995382B2
公开(公告)日：2021-05-04
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 , C22C38/60 , C21D9/02 , C21D9/08
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.

4. 发明授权

US10689726B2 Method for producing hot-formed steel springs 有权
公开(公告)号：US10689726B2
公开(公告)日：2020-06-23
申请号：US15509005
申请日：2015-07-15
申请人： ThyssenKrupp Federn und Stabilisatoren GmbH , ThyssenKrupp AG
发明人： Dieter Lechner , Marcel Groß , Heinz-Georg Gabor , Marco Roland , Dieter Brier
IPC分类号： C21D9/02 , C21D11/00 , C21D8/06 , C21D9/52 , B21F3/02 , C21D1/18 , F16F1/04
摘要： A process for producing a spring or torsion bar from a steel wire by hot forming may involve providing a steel wire; thermomechanically forming the steel wire; cooling the steel wire thermomechanically; cutting the steel wire to length to give rods; heating the rods; hot forming the rods; and tempering the rods to give a spring or torsion bar, comprising quenching the rods to give a spring or torsion bar to a first cooling temperature, reheating the spring or torsion bar to a first annealing temperature, and cooling the spring or rod to a second cooling temperature. Further, in some examples, the cooling of the steel wire may be cooled to a temperature below a minimum recrystallization temperature such that at least a partly ferritic-pearlitic structure is established in the steel wire.

5. 发明申请

US20190390727A1 SPRING AND MANUFACTURE METHOD THEREOF 审中-公开
公开(公告)号：US20190390727A1
公开(公告)日：2019-12-26
申请号：US16559137
申请日：2019-09-03
申请人： NHK SPRING CO., LTD.
发明人： Takeshi SUZUKI , Yoshiki ONO , Shimpei KUROKAWA , Kosuke SHIBAIRI
IPC分类号： F16F1/02 , C21D9/02
摘要： A spring consists 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 inevitable impurities. The spring has a structure including not less than 65% of bainite and 4 to 13% of residual austenite by area ratio in a cross section. The spring has a compressive residual stress layer in a cross section from a surface to a depth of 0.35 mm to D/4, in which D (mm) is a circle-equivalent diameter of the cross section. The spring has a high hardness layer with greater hardness than a center portion by 50 to 500 HV from a surface to a depth of 0.05 to 0.3 mm.

6. 发明申请

US20180298972A1 COIL SPRING 审中-公开
公开(公告)号：US20180298972A1
公开(公告)日：2018-10-18
申请号：US15562793
申请日：2016-03-16
申请人： NHK Spring Co., Ltd.
发明人： Masaru Matsubara , Suguru Kajigaya
IPC分类号： F16F1/02 , F16F1/06 , C21D9/02
摘要： This coil spring has a part of high hardness and a part of lower hardness than the part. Also, it is preferable that the hardness of the part that comes into contact with other members is lower than the hardness of the part other than the part that comes into contact with the other members. Moreover, it is preferable that the hardness of an end turn part of the coil spring is lower than the hardness of the part other than the end turn part. Furthermore, it is preferable that the hardness of the part that comes into contact with a receiving member adapted to receive the end turn part of the coil spring is lower than the hardness of the part other than the part that comes into contact with the receiving member.

7. 发明授权

US10041160B2 Steel for spring, and method for producing spring 有权
公开(公告)号：US10041160B2
公开(公告)日：2018-08-07
申请号：US15021048
申请日：2014-09-11
申请人： JFE STEEL CORPORATION , SUMIHATSU CO., LTD. , NHK SPRING CO., LTD.
发明人： Minoru Honjo , Kiyoshi Uwai , Shigeru Endo , Katsutoshi Yamashita , Koei Tsuru , Keiichi Fujie , Akira Tange
IPC分类号： C22C38/02 , C22C38/04 , C22C38/18 , C21D8/06 , C21D9/02 , F16F1/02 , C22C38/60 , C22C38/00 , C21D1/25 , C21D1/18 , C21D6/00 , C21D9/52 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/42
摘要： Provided is high strength steel for springs that, compared to conventional high strength steel for springs, has excellent decarburization resistance and scale exfoliation property, by optimization of the added amounts of C, Si, Mn, and Cr as well as of Sb and Sn. The steel for springs contains C: more than 0.45 mass % and less than 0.65 mass %, Si: 0.15 mass % or more and 0.70 mass % or less, Mn: 0.10 mass % or more and 1.00 mass % or less, Cr: 0.20 mass % or more and 1.50 mass % or less, P: 0.025 mass % or less, S: 0.025 mass % or less, O: 0.0015 mass % or less, Sb: 0.010 mass % or more and less than 0.030 mass %, and Sn: 0.010 mass % or more and 0.030 mass % or less, under predetermined conditions.

8. 发明授权

US09752636B2 Helical compression spring and method for manufacturing same 有权
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.

9. 发明申请

US20170022580A1 HIGH-STRENGTH SPRING STEEL 审中-公开
标题翻译：高强度弹簧钢
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％）。

10. 发明申请

US20160237518A1 HIGH TENSILE STRENGTH STEEL WIRE 审中-公开
标题翻译：高强度钢丝
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。

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