公开(公告)号：US09429255B2

公开(公告)日：2016-08-30

申请号：US14389866

申请日：2013-04-02

申请人： KOBE STEEL, LTD. ,  SHINKO METAL PRODUCTS CO., LTD. ,  NHK SPRING CO., LTD.

发明人： Takuya Kochi ,  Hitoshi Hatano ,  Eiichi Tamura ,  Kotaro Toyotake ,  Takashi Yajima ,  Akira Tange

IPC分类号： B22D19/00 ,  F16L9/02 ,  C21D8/10 ,  C21D9/02 ,  C21D9/08 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/24 ,  C22C38/28 ,  C22C38/34 ,  C22C38/42 ,  C22C38/46 ,  C22C38/50 ,  C21D6/00 ,  C22C38/02 ,  C22C38/44 ,  C22C38/48 ,  C22C38/54 ,  F16F1/02

CPC分类号： F16L9/02 ,  C21D6/008 ,  C21D8/10 ,  C21D9/02 ,  C21D9/08 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/24 ,  C22C38/28 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  F16F1/021

摘要： A hollow seamless pipe for a high-strength spring in the present invention includes a steel material in which chemical component compositions are properly adjusted, wherein a depth of a whole decarburized layer in an inner surface layer part is 100 μm or less, a depth of a flaw which is present in an inner surface is 40 μm or less, a width of the flaw is 60 μm or less, and a number density of a carbide which has a circle equivalent diameter of 500 nm or more and is present in the inner surface layer part is 1.8×10−2 particles/μm2 or less.

摘要翻译： 本发明的高强度弹簧用中空无缝管包括适当调整化学成分组成的钢材，其中，内表面层部的整个脱碳层的深度为100μm以下，深度为 存在于内表面的缺陷为40μm以下，缺陷的宽度为60μm以下，圆当量直径为500nm以上且存在于内侧的碳化物的数密度 表层部分为1.8×10 -2个/μm2以下。

公开(公告)号：US20150285410A1

公开(公告)日：2015-10-08

申请号：US14389866

申请日：2013-04-02

申请人： KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD) ,  SHINKO METAL PRODUCTS CO. LTD. ,  NHK SPRING CO, LTD

发明人： Takuya Kochi ,  Hitoshi Hatano ,  Eiichi Tamura ,  Kotaro Toyotake ,  Takashi Yajima ,  Akira Tange

IPC分类号： F16L9/02 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/00 ,  C22C38/42 ,  C22C38/34 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  F16F1/02 ,  C22C38/44

CPC分类号： F16L9/02 ,  C21D6/008 ,  C21D8/10 ,  C21D9/02 ,  C21D9/08 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/24 ,  C22C38/28 ,  C22C38/34 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  F16F1/021

摘要： A hollow seamless pipe for a high-strength spring in the present invention includes a steel material in which chemical component compositions are properly adjusted, wherein a depth of a whole decarburized layer in an inner surface layer part is 100 μm or less, a depth of a flaw which is present in an inner surface is 40 μm or less, a width of the flaw is 60 μm or less, and a number density of a carbide which has a circle equivalent diameter of 500 nm or more and is present in the inner surface layer part is 1.8×10−2 particles/μm2 or less.

摘要翻译： 本发明的高强度弹簧用中空无缝管包括适当调整化学成分组成的钢材，其中，内表面层部的整个脱碳层的深度为100μm以下，深度为 存在于内表面的缺陷为40μm以下，缺陷的宽度为60μm以下，圆当量直径为500nm以上且存在于内侧的碳化物的数密度 表层部分为1.8×10 -2个/μm2以下。

公开(公告)号：US10526675B2

公开(公告)日：2020-01-07

申请号：US15520616

申请日：2015-10-26

申请人： Kobe Steel, Ltd. ,  NHK SPRING CO., LTD.

发明人： Takuya Kochi ,  Hitoshi Hatano ,  Akira Tange ,  Kiyoshi Kurimoto ,  Yurika Goto

IPC分类号： C21D9/08 ,  C22C38/06 ,  C22C38/02 ,  C21D6/00 ,  C22C38/00 ,  C22C38/18 ,  C22C38/04 ,  C21D9/02 ,  C22C38/50 ,  C22C38/20 ,  C22C38/46 ,  C22C38/42 ,  C22C38/48 ,  C22C38/40

摘要： A method for manufacturing steel, by quenching and tempering a seamless pipe for use as a material of a hollow spring, where the seamless pipe including predetermined components is subjected to a heat treatment which is performed to satisfy quenching conditions (1) and tempering conditions (2), (1) quenching conditions: 26,000≤(T1+273)×(log(t1)+20)≤29,000 900° C.≤T1≤1,050° C., 10 seconds≤t1≤1,800 seconds,  formula (1) where T1 is a quenching temperature (° C.), and t1 is a holding time (seconds) in a temperature range of 900° C. or higher, and (2) tempering conditions: 13,000≤(T2+273)×(log(t2)+20)≤15,500 T2≤550° C., and t2≤3,600 seconds,  formula (2) where T2 is a tempering temperature (° C.), and t2 is a total time (seconds) from start of heating to completion of cooling.

公开(公告)号：US11285776B2

公开(公告)日：2022-03-29

申请号：US16146269

申请日：2018-09-28

申请人： NHK SPRING CO., LTD.

发明人： Akira Tange ,  Masato Sugawara ,  Yutaka Wakabayashi

IPC分类号： B60G21/055 ,  F16F1/02 ,  F16F1/14 ,  B23P23/04

摘要： A terminal sealed portion is formed on an end portion of a hollow rod made of steel. An enclosed space is formed on an inner side of the hollow rod. At an end of the enclosed space, a terminal gap is formed. A volatile powdered rust inhibitor is supplied in the enclosed space. As the volatile powdered rust inhibitor is vaporized, the enclosed space is turned into a rust-inhibiting atmosphere. As the vaporized component of the volatile powdered rust inhibitor is adsorbed to an inner surface of the enclosed space, an inner surface rust-inhibiting film is formed. The vaporized component also enters inside the terminal gap, and forms a terminal rust-inhibiting film.

公开(公告)号：US11111554B2

公开(公告)日：2021-09-07

申请号：US15534472

申请日：2015-12-04

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

摘要： A stabilizer formed by using a metal bar having a solid structure and configured to reduce a displacement between right and left wheels, including a torsion part extending in a vehicle width direction, being capable of a torsional deformation, and having a diameter of 10 to 32 mm, is provided. The stabilizer has a chemical composition containing at least C: 0.15% by mass or more to 0.39% by mass or less, Mn, B, and Fe, and also has a metal structure 90% or more of which is a martensite structure.

公开(公告)号：US09404547B2

公开(公告)日：2016-08-02

申请号：US13886106

申请日：2013-05-02

申请人： NHK SPRING CO., LTD.

发明人： Hideki Okada ,  Akira Tange ,  Koichi Tango ,  Isao Sumiyoshi

IPC分类号： F16F1/02 ,  C22C38/42 ,  C21D8/06 ,  C21D7/06 ,  C21D9/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/50 ,  C22C38/02

CPC分类号： F16F1/021 ,  C21D7/06 ,  C21D8/06 ,  C21D8/065 ,  C21D9/02 ,  C21D9/52 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/28 ,  C22C38/34 ,  C22C38/42 ,  C22C38/46 ,  C22C38/50 ,  F16F1/02

摘要： A steel for high-strength spring has an Ac3 transformation temperature as an indicator of the decarburization performance, which is calculated by Equation (1) below, is from 859 to 885° C., a maximum hardened diameter DI as an indicator of the hardening performance, which is calculated by Equation (2) below, is from 70 to 238 mm, and a temper hardness HRC as an indicator of the spring performance, which is calculated by Equation (3) below, is from 50 to 55. Ac3=910−203×√{square root over (C)}−15.2Ni+44.7Si+104V+31.5Mo+13.1W  (1) DI=DO×fSi×fMn×fP×fS×fCu×fNi×fCr  (2) HRC=38.99+17.48C+2.55Si−2.28Ni+2.37Cr+8.04Ti  (3) wherein, D0=8.65×√{square root over (C)}, fSi=1+0.64×% Si, fMn=1+4.10×% Mn, fP=1+2.83×% P, fS=1−0.62×% S, fCu=1+0.27×% Cu, fNi=1+0.52×% Ni, and fCr=1+2.33×% Cr.

摘要翻译： 用于高强度弹簧的钢具有作为脱碳性能的指示剂的Ac 3相变温度，其由下式（1）计算，为859〜885℃，最大硬化直径DI为硬化指标 由下式（2）计算的性能为70〜238mm，由下式（3）计算出的作为弹簧性能的指标的回火硬度HRC为50〜55。Ac3 = （1）DI = DO×fSi×fMn×fP×fS×fCu×fNi×fCr（2）（10） HRC = 38.99 + 17.48℃+ 2.55Si-2.28Ni + 2.37Cr + 8.04Ti（3）其中，D0 = 8.65×√{平方根超过（C）}，fSi = 1 + 0.64×％Si，fMn = 1 + 4.10×％Mn，fP = 1 + 2.83×％P，fS = 1-0.62×％S，fCu = 1 + 0.27×％Cu，fNi = 1 + 0.52×％Ni，fCr = 1 + 2.33×％ 。

公开(公告)号：US20150176101A1

公开(公告)日：2015-06-25

申请号：US14402745

申请日：2013-02-25

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION ,  NHK SPRING CO., LTD.

发明人： Tetsuo Ishitsuka ,  Motofumi Koyuba ,  Masamichi Iwamura ,  Akira Tange ,  Ken Takahashi ,  Kiyoshi Kurimoto ,  Yutaka Wakabayashi

IPC分类号： C21D9/50 ,  C22C38/50 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C21D9/08 ,  C21D8/10 ,  C21D7/13 ,  C21D7/06 ,  C22C38/54

CPC分类号： C21D9/50 ,  B21C37/08 ,  B21C51/00 ,  B60G21/055 ,  B60G2206/427 ,  B60G2206/72 ,  C21D7/06 ,  C21D7/13 ,  C21D8/10 ,  C21D8/105 ,  C21D9/08 ,  C21D9/085 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/50 ,  C22C38/54

摘要： A hollow stabilizer having an excellent fatigue property and higher strength compared to the conventional ones has a chemical composition containing 0.26% to 0.30% of C, 0.05% to 0.35% of Si, 0.5% to 1.0% of Mn, 0.05% to 1.0% of Cr, 0.005% to 0.05% of Ti, 0.0005% to 0.005% of B, and 0.0005% to 0.005% of Ca, wherein; Al, P, S, N, and O are limited to 0.08% or less, 0.05% or less, less than 0.0030%, 0.006% or less, and 0.004% or less, respectively, a remainder of the chemical composition consists of Fe and unavoidable impurities, a value of a product of the Mn content and the S content is 0.0025 or less, and a critical cooling rate Vc90 represented by a predetermined equation is 40° C./s or less; and wherein a metallic structure comprises a tempered martensite, a length of elongated MnS present at a center part in a thickness direction of the hollow stabilizer is 150 μm or less, a HRC is from 40 to 50, a thickness to outer diameter ratio is 0.14 or more, and a depth of a decarburized layer at an inner surface part is 20 μm or less from the inner surface; and a steel pipe for hollow stabilizers used as a material for the hollow stabilizer.

摘要翻译： 具有优异的疲劳特性和较高强度的中空稳定剂与常规的相比具有含有C：0.26〜0.30％，Si：0.05〜0.35％，Mn：0.5〜1.0％，Mn：0.05〜1.0％ 的Cr，0.005〜0.05％的Ti，0.0005〜0.005％的B和0.0005〜0.005％的Ca，其中： Al，P，S，N和O分别限制在0.08％以下，0.05％以下，小于0.0030％，0.006％以下，0.004％以下，其余的化学成分由Fe 和不可避免的杂质，Mn含量和S含量的乘积值为0.0025以下，由规定方程式表示的临界冷却速度Vc90为40℃/ s以下。 并且其中金属结构包括回火马氏体，在中空稳定器的厚度方向的中心部分存在的细长MnS的长度为150μm以下，HRC为40〜50，厚度比为外径比为0.14 以上，内表面部的脱碳层的深度为内表面的20μm以下。 以及用作中空稳定剂的材料的中空稳定剂用钢管。

公开(公告)号：US10900112B2

公开(公告)日：2021-01-26

申请号：US16145158

申请日：2018-09-27

申请人： NHK SPRING CO., LTD.

发明人： Morimichi Kai ,  Akira Tange

IPC分类号： C23C8/22 ,  C21D9/02 ,  C21D1/06 ,  F16F1/06 ,  F16F1/14 ,  B60G11/14 ,  B60G21/055 ,  C21D9/08 ,  C23C8/02 ,  C23C8/04 ,  C23C8/80 ,  F16F1/04

摘要： A hollow spring member and hollow spring member production method can be provided, which can save the time and energy necessary for carburization, thus requiring no dedicated carburizing furnace or the like for carburization, and further can make the interior space of a steel tube a rust-prevention atmosphere. A hollow stabilizer for a vehicle includes a steel tube sealed at one end and another end thereof and a carburizing gas sealed in the interior space of the steel tube.

公开(公告)号：US10584408B2

公开(公告)日：2020-03-10

申请号：US15814892

申请日：2017-11-16

申请人： NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY ,  NHK SPRING CO., LTD.

发明人： Wataru Nakao ,  Akira Tange ,  Koichi Tango ,  Morimichi Kai

IPC分类号： C23C8/22 ,  C21D1/06 ,  C21D9/02 ,  C23C8/20 ,  F27B9/40 ,  F27B9/30 ,  F27D17/00 ,  F27B9/04 ,  C23C8/80

摘要： A carburization device includes a heating furnace which heats a material, a transfer mechanism, an alcohol vapor generator, an alcohol vapor spraying portion, a quenching tank, and an exhaust heat intake tube. The transfer mechanism moves a plurality of materials. The alcohol vapor generator uses part of heat generated by the heating furnace as a heat source. As the alcohol vapor spraying portion repeats a vapor spraying step and a diffusion step a plurality of times in the heating furnace. In the vapor spraying step, by spraying alcohol vapor on the material which moves inside the heating furnace, carbon in the alcohol is adsorbed to the material. In the diffusion step, an interval for diffusing the carbon adsorbed to the material is taken.

公开(公告)号：US10583706B2

公开(公告)日：2020-03-10

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 ,  C21D7/06 ,  F16F1/04 ,  C21D9/02

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.