-
公开(公告)号：EP3527685A1
公开(公告)日：2019-08-21
申请号：EP19161523.6
申请日：2012-07-26
Applicant: NHK Spring Co., Ltd.
Inventor： IKAI, Kazuya , SHIRAISHI, Tohru , ONO, Yuichiro , ONO, Yoshiki
IPC: C22C38/04 , C22C38/54 , B24C1/10 , C21D7/06 , C21D9/02 , F16F1/06 , B21F35/00 , C21D8/06 , C22C38/02 , C22C38/18 , C22C38/24 , C22C38/34 , C22C38/46 , F16F1/02
Abstract: By giving an appropriate compressive residual stress to a wire material, a compression coil spring having high durability can be provided even using an inexpensive wire material. The present invention provides a compression coil spring formed by using a steel wire material, the steel wire material consisting of C: 0.45 to 0.85 mass%, Si: 0.15 to 2.5 mass%, Mn: 0.3 to 1.0 mass%, Fe and inevitable impurities as a remainder, and a circle-equivalent diameter of 1.5 to 9.0 mm, wherein hardness of a freely selected cross-section of the wire material is 570 to 700 HV, and at an inner diameter side of the coil spring, unloaded compressive residual stress at a depth of 0.2 mm from a surface in an approximate maximal main stress direction in a case in which compressive load is loaded on the spring is 200 MPa or more, and unloaded compressive residual stress at a depth of 0.4 mm from surface is 100 MPa or more.
-
公开(公告)号：EP2840155B1
公开(公告)日：2017-10-11
申请号：EP13778444.3
申请日：2013-03-29
Applicant: NHK Spring Co., Ltd.
Inventor： ARAOKA, Yuji , SHIRAISHI, Tohru , ONO, Yoshiki
CPC classification number: C22C23/06 , B21C23/001 , B21C23/005 , B22D11/005 , B22D11/0611 , B22D21/007 , B22F3/10 , B22F3/20 , B22F3/24 , B22F5/12 , B22F2998/10 , C21D7/00 , C21D7/06 , C21D8/06 , C22C1/02 , C22C1/0408 , C22C23/00 , C22C23/02 , C22F1/06 , Y02P10/212 , Y10T428/12 , Y10T428/12993 , B22F9/08 , B22F3/17 , B22F2003/166 , B22F3/18
Abstract: A high-strength magnesium alloy member is suitable for products in which at least one of bending stress and twisting stress primarily acts. The member has required elongation and 0.2 % proof stress, whereby strength and formability are superior, and has higher strength and large compressive residual stress in the vicinity of the surface of a wire rod. In the magnesium alloy member formed as a wire rod in which at least one of bending stress and twisting stress primarily acts, the wire rod includes a surface portion having the highest hardness of 170 HV or more in the vicinity of the surface and an inner portion having a 0.2 % proof stress of 550 MPa or more and an elongation of 5 % or more, and the wire rod has the highest compressive residue stress in the vicinity of the surface of 50 MPa or more.
-
3.发明公开TITANIUM ALLOY MEMBER AND PRODUCTION METHOD THEREFOR 有权TISANLEGIERUNGSELEMENT UND HERSTELLUNGSVERFAHRENDAFÜR
公开(公告)号：EP2719781A1
公开(公告)日：2014-04-16
申请号：EP12796078.9
申请日：2012-04-27
Applicant: Nhk Spring Co., Ltd.
Inventor： SHIRAISHI, Tohru , ONO, Yoshiki , ARAOKA, Yuji
CPC classification number: B22F1/0081 , A61L27/06 , B22F3/24 , B22F2998/10 , C22C1/0458 , C22C14/00 , C22F1/183 , C23C8/80 , C23C26/00 , B22F1/0088 , B22F1/0003 , B22F3/10 , B22F3/14 , B22F3/15 , B22F3/105
Abstract: A high strength titanium alloy member with superior fatigue resistance, and a production method therefor, are provided. The titanium alloy member is made of an inexpensive α-β type titanium alloy having broad utility and has high proof stress and high strength from the surface to the entire interior portion, while having great compressive residual stress provided from the surface to deep in the interior. The production method includes preparing a raw material made of titanium alloy, nitriding the raw material to form a nitrogen-containing raw material by generating a nitrogen compound layer and/or a nitrogen solid solution layer in a surface layer of the raw material, mixing the raw material and the nitrogen-containing raw material to yield a nitrogen-containing mixed material, sintering the nitrogen-containing mixed material to obtain a sintered titanium alloy member by bonding the material together and uniformly diffusing nitrogen in solid solution from the nitrogen-containing raw material to the entire interior portion of the sintered titanium alloy member, hot plastic forming and/or heat treating the sintered titanium alloy member to obtain a processed member, and surface treating the processed member to provide compressive residual stress.
Abstract translation: 提供了具有优异的耐疲劳性的高强度钛合金构件及其制造方法。 钛合金构件由廉价的±2型钛合金制成，具有广泛的用途，并且具有从表面到整个内部部分的高的抗应力和高强度，同时具有从表面到内部提供的很大的压缩残余应力 。 制造方法包括：制备由钛合金制成的原料，通过在原料的表面层中产生氮化合物层和/或氮固溶体层，将原料渗氮以形成含氮原料，将 原料和含氮原料，得到含氮混合材料，烧结含氮混合材料，通过将该材料粘合在一起并将固氮中的氮均匀地从含氮原料 材料到烧结钛合金构件的整个内部，热塑性成形和/或热处理烧结的钛合金构件以获得加工构件，并且对加工构件进行表面处理以提供压缩残余应力。
-
公开(公告)号：EP2743366B1
公开(公告)日：2019-04-17
申请号：EP12822031.6
申请日：2012-07-26
Applicant: NHK Spring Co., Ltd.
Inventor： IKAI, Kazuya , SHIRAISHI, Tohru , ONO, Yuichiro , ONO, Yoshiki
-
公开(公告)号：EP2868759B1
公开(公告)日：2017-10-18
申请号：EP13812689.1
申请日：2013-06-28
Applicant: NHK Spring Co.,Ltd. , Tohoku University
Inventor： MATSUMOTO, Hiroaki , CHIBA, Akihiko , LEE, Sang-Hak , ONO, Yoshiki
Abstract: The present invention provides an ±+² type titanium alloy and a production method therefor, which has an ultrafine structure causing superplasticity under low temperatures and has a high deformation ratio compared to conventional ±+² type Ti alloys. The alloy has an ultrafine structure consisting of equiaxial crystals in which an area ratio of crystals having a grain diameter of 1 µm or less is 60 % or more, and maximum frequency grain diameter is 0.5 µm or less, wherein a portion in which the integration degree of plane orientation (0001) of the hexagonal close-packed crystal is 1.00 or more exists within a range of 0 to 60 degrees with respect to a normal line of a processed surface of the alloy.
-
Patent Agency Ranking
公开(公告)号：EP2816707A1
公开(公告)日：2014-12-24
申请号：EP13749694.9
申请日：2013-02-14
Applicant: NHK Spring Co., Ltd.
Inventor： KAMEDA, Yohei , IWATA, Kazuo , OKURA, Ken , ONO, Yoshiki
CPC classification number: H02K1/16 , H02K1/02 , H02K1/165 , H02K15/024 , H02K2213/03
Abstract: Provided is a stator core for a motor capable of facilitating an assembly work and parts management without increasing the number of components while suppressing leakage of magnetic flux passing through a flange to a coil. A stator core 13 has an annular yoke portion 15 and tooth portions 17 inwardly protruding from an inner periphery of the yoke portion 15 in a radial direction, wherein at a front end of the tooth portion 17 inwardly protruding in the radial direction, a flange portion 21 is provided so as to face a coil wound around the tooth portion 17 and wherein to the flange portion 21, a compressive residual stress portion M is provided.
Abstract translation: 提供一种用于电动机的定子铁心，其能够在不增加部件数量的同时便于组装工作和部件管理，同时抑制通过法兰到线圈的磁通量的泄漏。 定子铁心13具有环形磁轭部15和从磁轭部15的内周向径向内侧突出的齿部17，其中，在径向内侧突出的齿部17的前端，凸缘部 21设置为面对缠绕在齿部17周围的线圈，并且其中，在凸缘部21设置有压缩残余应力部M.
-
公开(公告)号：EP2719782A1
公开(公告)日：2014-04-16
申请号：EP12797338.6
申请日：2012-04-27
Applicant: Nhk Spring Co., Ltd.
Inventor： SHIRAISHI, Tohru , ONO, Yoshiki , ARAOKA, Yuji
CPC classification number: C22C14/00 , A61L27/06 , B22F1/0088 , B22F3/03 , B22F3/10 , B22F3/14 , B22F2003/208 , B22F2998/10 , B22F2999/00 , C22C1/0458 , C22F1/183 , C23C8/24 , C23C8/80 , B22F2201/02 , B22F9/06 , B22F1/004 , B22F2201/20 , B22F1/0003 , B22F3/15 , B22F3/105 , B22F3/20
Abstract: A titanium alloy member with high strength and high proof stress not only in the surface but also inside, using a general and inexpensive α-β type titanium alloy, and a production method therefor, are provided. The production method includes preparing a raw material made of titanium alloy, nitriding the raw material to form a nitrogen-containing raw material by generating a nitrogen compound layer and/or a nitrogen solid solution layer in a surface layer of the raw material, mixing the raw material and the nitrogen-containing raw material to yield a nitrogen-containing mixed material, sintering the nitrogen-containing mixed material to obtain a sintered titanium alloy member by bonding the material together and uniformly diffusing nitrogen in solid solution from the nitrogen-containing raw material to the entire interior portion of the sintered titanium alloy member, and hot plastic forming the sintered titanium alloy member.
Abstract translation: 本发明提供一种钛合金构件及其制造方法，其使用通常廉价的α-β型钛合金，不仅在表面，而且在内部都具有高强度和高耐力的钛合金构件。 该制造方法包括：准备由钛合金构成的原料，通过在原料的表面层中生成氮化合物层和/或氮固溶体层，将原料氮化以形成含氮原料， 原料和含氮原料混合以产生含氮混合材料，将含氮混合材料烧结以获得烧结的钛合金构件，通过将材料粘合在一起并且将固体溶液中的氮均匀地从含氮原料中扩散 材料到烧结钛合金构件的整个内部部分，以及形成烧结钛合金构件的热塑性材料。
-
公开(公告)号：EP2682493A1
公开(公告)日：2014-01-08
申请号：EP12755633.0
申请日：2012-03-01
Applicant: NHK Spring Co.,Ltd.
Inventor： SUZUKI, Takeshi , ONO, Yoshiki , KUROKAWA, Shimpei
CPC classification number: F16F1/021 , B21F35/00 , C21D7/06 , C21D9/02 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/18 , C22C38/34 , F16F1/06 , Y10T29/49609
Abstract: A spring with superior fatigue resistance and a production method therefor are provided by decreasing the material cost and simplifying the production process. There is provided with a spring comprising: 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 inevitable impurities; a structure including not less than 95 % of tempered martensitic structure by area ratio in a cross section of a wire material; a compressive residual stress layer formed from a surface to a depth of 0.35 mm to D/4, in which D (mm) is a circle-equivalent diameter of a cross section, 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 in the cross section; and a high hardness layer with greater hardness than the center portion by 50 to 500 HV from a surface to a depth of 0.05 to 0.3 mm.
Abstract translation: 通过降低材料成本并简化生产过程，提供了具有优异的耐疲劳性的弹簧及其制造方法。 本发明提供一种弹簧，其特征在于，以质量％计，C：0.5〜0.7％，Si：1.0〜2.0％，Mn：0.1〜1.0％，Cr：0.1〜1.0％，Cr：0.035％ 的P，不大于0.035％的S，余量为Fe和不可避免的杂质; 在线材的截面中包含不少于95％的回火马氏体结构面积比的结构; 从表面到深度为0.35mm至D / 4的压缩残余应力层，其中D（mm）是截面的圆当量直径，压缩残余应力层的最大压缩残余应力为800〜 2000MPa; 维氏硬度为550-700HV的中心部分; 以及硬度比硬度高的中心部分的高硬度层，从表面到深度为0.05〜0.3mm的范围是50〜500HV。
-
9.发明公开TITANIUM ALLOY CONTAINING NANOCRYSTALS, AND PROCESS FOR PRODUCING SAME 审中-公开TITANLEGIERUNG MIT NANOKRISTALLEN UND VERFAHREN ZU IHRER HERSTELLUNG
公开(公告)号：EP2644724A1
公开(公告)日：2013-10-02
申请号：EP11843473.7
申请日：2011-11-22
Applicant: Nhk Spring Co., Ltd. , Tohoku University
Inventor： LEE, Sang-Hak , ONO, Yoshiki , MATSUMOTO, Hiroaki , CHIBA, Akihiko
Abstract: A titanium alloy material has high strength, high fatigue strength, and reduced hardness, and is suitable for various types of structural materials including those for vehicles, and a production method therefor, are provided. An alloy having an α' martensite which is a processing starting structure is hot worked. The alloy is heated at a temperature increase rate of 50 to 800 °C/sec, and strain is given at not less than 0.5 by a processing strain rate of from 0.01 to 10 /sec in a case of a temperature range of 700 to 800 °C, or by a processing strain rate of 0.1 to 10 /sec in a case of a temperature range of 800 °C to 1000 °C. By generating equiaxial crystals having average crystal particle diameters of less than 1000 nm through the above processes, a titanium alloy having high strength and high fatigue resistant property can be obtained, in which hardness is less than 400 HV, tensile strength is not less than 1200 MPa, and static strength and dynamic strength are superior.
Abstract translation: 钛合金材料具有高强度，高疲劳强度和降低的硬度，并且适用于各种类型的结构材料，包括用于车辆的结构材料及其制造方法。 具有作为加工起始结构的±马氏体的合金被热加工。 以50〜800℃/秒的升温速度加热合金，在700〜800℃的温度范围内，通过0.01〜10 /秒的加工应变速度使应变为0.5以上 或者在800〜1000℃的温度范围内，通过0.1〜10 /秒的加工应变速度。 通过上述方法生成平均结晶粒径小于1000nm的等轴晶体，可以得到硬度小于400HV，抗拉强度为1200以上的高强度，高耐疲劳性的钛合金 MPa，静强度和动态强度优异。
-
公开(公告)号：EP2602350A1
公开(公告)日：2013-06-12
申请号：EP11814765.1
申请日：2011-08-04
Applicant: Nhk Spring Co., Ltd.
Inventor： SUZUKI, Takeshi , ONO, Yoshiki , KUROKAWA, Shimpei , SHIBAIRI, Kosuke
CPC classification number: F16F1/021 , B24C1/10 , C21D1/18 , C21D7/06 , C21D8/065 , C21D9/02 , C21D2211/001 , C21D2211/002 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/18
Abstract: A spring with superior fatigue resistance and a production method therefor are provided by decreasing the material cost and simplifying the production process. The 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, and the residual austenite contains carbon at an average concentration of 0.65 to 1.7 %. 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) in a circle-equivalent diameter of the cross section. The compressive residual stress layer has maximum compressive residual stress of 800 to 2000 MPa. The spring has a center portion with hardness of 550 to 650 HV in a cross section and has a high hardness layer with greater hardness than the center portion by 50 to 500 HV from a surface to a depth of 0.05 to 0.3 mm.
-
-
-
-
-
-
-
-
-
Search Results
32
records
(took 0.02 seconds)
