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

申请人： NHK Spring Co., Ltd.

发明人： IKAI, Kazuya ,  SHIRAISHI, Tohru ,  ONO, Yuichiro ,  ONO, Yoshiki

IPC分类号： 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

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

申请人： Nhk Spring Co., Ltd.

发明人： SHIRAISHI, Tohru ,  ONO, Yoshiki ,  ARAOKA, Yuji

IPC分类号： C22C1/04 ,  A61C8/00 ,  B22F3/20 ,  B22F3/24 ,  B22F9/04 ,  C22C1/00 ,  C22C14/00 ,  C23C8/24

CPC分类号： 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

摘要： 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.

摘要翻译： 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：EP2719782B1

公开(公告)日：2018-02-14

申请号：EP12797338.6

申请日：2012-04-27

申请人： NHK Spring Co., Ltd.

发明人： SHIRAISHI, Tohru ,  ONO, Yoshiki ,  ARAOKA, Yuji

IPC分类号： C22C1/04 ,  A61C8/00 ,  B22F3/20 ,  B22F3/24 ,  B22F9/04 ,  C22C1/00 ,  C22C14/00 ,  C23C8/24

CPC分类号： 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

摘要： A titanium alloy member with high strength and high proof stress not only in the surface but also inside, using a general and inexpensive ±-² 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.

公开(公告)号：EP2628813A1

公开(公告)日：2013-08-21

申请号：EP11832618.0

申请日：2011-10-14

申请人： Nhk Spring Co., Ltd.

发明人： ARAOKA, Yuji ,  SHIRAISHI, Tohru ,  ONO, Yoshiki

IPC分类号： C22C23/06 ,  B22F3/14 ,  B22F3/20 ,  C22C23/00

CPC分类号： C22C23/00 ,  B22F3/20 ,  B22F3/24 ,  B22F5/12 ,  B22F2998/00 ,  B22F2998/10 ,  C22C23/06 ,  C22F1/06 ,  B22F2303/01 ,  B22F2301/058 ,  B22F9/08 ,  B22F3/10

摘要： A high-strength magnesium alloy wire rod suitable for products in which at least one of bending stress and twisting stress primarily acts is provided. The wire rod has required elongation and 0.2 % proof stress, whereby strength and formability are superior, and has higher strength in the vicinity of the surface. In the wire rod, the surface portion has the highest hardness in a cross section of the wire rod, the highest hardness is 170 HV or more, and the inner portion has a 0.2 % proof stress of 550 MPa or more and an elongation of 5% or more.

摘要翻译： 一种高强度的镁合金线材适合用于其中提供弯曲应力和扭转应力主要作用中的至少一种产物。 线材已要求的伸长率和0.2％屈服强度，由此强度和成形性优越，并且具有在表面附近更高的强度。 在线材中，表面部分具有在所述线材的横截面的最高硬度，硬度最高为170 [Hv]以上，并且所述内部部分具有550MPa以上和5伸长率的0.2％屈服强度 ％以上。

公开(公告)号：EP2896712A1

公开(公告)日：2015-07-22

申请号：EP13837663.7

申请日：2013-09-05

申请人： Nhk Spring Co., Ltd.

发明人： ONO, Yuitirou ,  SHIRAISHI, Tohru ,  ONO, Yoshiki ,  TAKAHASHI, Keita

IPC分类号： C22C38/00 ,  B21F3/02 ,  B21F35/00 ,  B24C1/10 ,  B24C11/00 ,  C21D1/06 ,  C21D7/06 ,  C21D8/06 ,  C21D9/02 ,  C22C38/04 ,  C22C38/54 ,  C23C8/22 ,  C23C8/80 ,  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： Tensile residual stress due to coiling processing is solved and appropriate compressive residual stress distribution is imparted by forming C-condensed layer at the wire material surface, so that compression coil spring having high durability is produced by using inexpensive wire material in the method for production of the present invention. 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 mm from surface of the wire material is not less than 200 MPa and not less than 60 MPa, respectively.

公开(公告)号：EP2840155A1

公开(公告)日：2015-02-25

申请号：EP13778444.3

申请日：2013-03-29

申请人： Nhk Spring Co., Ltd.

发明人： ARAOKA, Yuji ,  SHIRAISHI, Tohru ,  ONO, Yoshiki

IPC分类号： C22C23/00 ,  B21C23/00 ,  B22D11/00 ,  B22D11/01 ,  B22D11/06 ,  B22D21/04 ,  C22C1/02 ,  C22F1/06

CPC分类号： 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

摘要： 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.

公开(公告)号：EP2743366A1

公开(公告)日：2014-06-18

申请号：EP12822031.6

申请日：2012-07-26

申请人： Nhk Spring Co., Ltd.

发明人： IKAI, Kazuya ,  SHIRAISHI, Tohru ,  ONO, Yuichiro ,  ONO, Yoshiki

IPC分类号： C22C38/04 ,  C22C38/54 ,  B24C1/10 ,  C21D7/06 ,  C21D9/02 ,  F16F1/06

CPC分类号： F16F1/021 ,  B21F35/00 ,  B24C1/10 ,  C21D7/06 ,  C21D8/065 ,  C21D9/02 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/24 ,  C22C38/34 ,  C22C38/46 ,  F16F1/06

摘要： 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.

摘要翻译： 通过对线材赋予适当的压缩残余应力，即使使用便宜的线材也能够提供耐久性高的压缩螺旋弹簧。 本发明提供一种通过使用钢丝材料形成的压缩螺旋弹簧，所述钢丝材料由C：0.45〜0.85质量％，Si：0.15〜2.5质量％，Mn：0.3〜1.0质量％组成，Fe和不可避免的杂质 作为余量，圆当量直径为1.5〜9.0mm，其中线材自由选择的横截面的硬度为570〜700HV，在螺旋弹簧的内径侧，无负荷的压缩残余应力 在弹簧上施加压缩载荷的情况下，在大致最大主应力方向上的表面的深度为0.2mm处，距离表面0.4mm深度的无载荷压缩残余应力为100MPa 或者更多。

公开(公告)号：EP3611286A1

公开(公告)日：2020-02-19

申请号：EP18784444.4

申请日：2018-04-10

申请人： NHK Spring Co., Ltd.

发明人： AKANUMA, Toshiyuki ,  SHIRAISHI, Tohru ,  IWAGAKI, Yohei ,  TAKAHASHI, Keita ,  HIRAI, Shun

IPC分类号： C22C38/00 ,  C21D1/06 ,  C21D7/06 ,  C21D9/02 ,  C22C38/46 ,  F16F1/06 ,  C22C38/54

摘要： A C-condensed layer is formed on the surface of a wire material at a uniform thickness and in a narrow range, and appropriate compression residual stress distribution is imparted to the wire material after it is formed, so that a compression coil spring of high durability and with sag resistance can be provided. The compression coil spring includes a steel wire material containing, hereinafter in weight%, 0.5 to 0.7 % of C, 1.2 to 3.0 % of Si, 0.3 to 1.2 % of Mn, 0.5 to 1.9 % of Cr and 0.05 to 0.5 % of V as necessary components, one or more kinds selected from not more than 1.5 % of Ni, not more than 1.5 % of Mo and not more than 0.5 % of W as freely selected components, and iron and inevitable impurities as the remainder; the C-condensed layer which exceeds the average concentration of C contained in the steel wire material exists at a surface layer part, and the thickness of the C-condensed layer is within 0.01 to 0.05 mm along the entire circumference of the steel wire material.

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

申请人： NHK Spring Co., Ltd.

发明人： IKAI, Kazuya ,  SHIRAISHI, Tohru ,  ONO, Yuichiro ,  ONO, Yoshiki

IPC分类号： 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

摘要： 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

申请人： NHK Spring Co., Ltd.

发明人： ARAOKA, Yuji ,  SHIRAISHI, Tohru ,  ONO, Yoshiki

IPC分类号： C22C23/00 ,  B21C23/00 ,  B22D11/00 ,  B22D11/01 ,  B22D11/06 ,  B22D21/04 ,  C22C1/02 ,  C22F1/06

CPC分类号： 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

摘要： 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.