公开(公告)号：EP1201773A1

公开(公告)日：2002-05-02

申请号：EP00937195.6

申请日：2000-06-08

Applicant: NHK Spring Co., Ltd.

Inventor： TANGE, Akira ,  ANDO, Kotoji ,  WATANABE, Koji

IPC: C21D7/06

CPC classification number: C21D9/02 ,  C21D7/06 ,  F16F1/021 ,  F16F2226/00 ,  Y10S148/908 ,  Y10T29/479

Abstract: In a production process for highly strengthened springs, the process comprises performing a first shot peening to a spring steel having a hardness of a diameter of 2.7 mm or less on a Brinell ball mark while applying stress to the springs at a warm temperature in the range of 150 to 350°C.

公开(公告)号：EP3299488A1

公开(公告)日：2018-03-28

申请号：EP16796396.6

申请日：2016-05-12

Applicant: National University Corporation Yokohama National University ,  NHK Spring Co., Ltd.

Inventor： NAKAO, Wataru ,  TANGE, Akira ,  TANGO, Koichi ,  KAI, Morimichi

IPC: C23C8/22 ,  C21D1/06 ,  C21D9/02

CPC classification number: C23C8/22 ,  C21D1/06 ,  C21D9/02 ,  C23C8/20 ,  C23C8/80 ,  F27B9/045 ,  F27B9/3005 ,  F27B9/40 ,  F27D17/004

Abstract: A carburization device (10B) includes a heating furnace (50) which heats a material (11) made of steel, a transfer mechanism (55), an alcohol vapor generator (32B), an alcohol vapor spraying portion (57), a quenching tank (58), and an exhaust heat intake tube (61). The transfer mechanism (55) moves a plurality of materials (11) from an inlet portion (51) toward an outlet portion (52) of the heating furnace (50). The alcohol vapor generator (32B) uses part of heat generated by the heating furnace (50) as a heat source. As the alcohol vapor spraying portion (57) repeats a vapor spraying step and a diffusion step a plurality of times in the heating furnace (50), a carburization treatment of the material (11) is performed. In the vapor spraying step, by spraying alcohol vapor on the material (11) which moves inside the heating furnace (50), carbon in the alcohol is adsorbed to the material (11). In the diffusion step, an interval for diffusing the carbon adsorbed to the material is taken.

Abstract translation: 渗碳装置（10B）包括加热由钢制成的材料（11）的加热炉（50），传送机构（55），醇蒸气发生器（32B），醇蒸气喷射部分（57），淬火 （58）和排热吸入管（61）。 传送机构55使多种材料11从加热炉50的入口部51朝向出口部52移动。 醇蒸气发生器（32B）利用加热炉（50）产生的热量的一部分作为热源。 当醇蒸汽喷射部分57在加热炉50中多次重复蒸汽喷射步骤和扩散步骤时，对材料11进行渗碳处理。 在蒸汽喷射步骤中，通过向在加热炉（50）内移动的材料（11）喷射醇蒸气，醇中的碳被吸附到材料（11）上。 在扩散步骤中，获取用于扩散吸附在材料上的碳的间隔。

公开(公告)号：EP3231644A1

公开(公告)日：2017-10-18

申请号：EP15868473.8

申请日：2015-12-04

Applicant: NHK Spring Co., Ltd.

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

IPC: B60G21/055 ,  B24C1/10 ,  C21D7/06 ,  C21D9/00 ,  C22C38/00 ,  C22C38/04 ,  C22C38/60 ,  F16F1/14 ,  C21D1/60 ,  C21D8/06

CPC classification number: C21D9/0068 ,  B21D47/00 ,  B21D53/88 ,  B24C1/10 ,  B60G21/055 ,  B60G2206/427 ,  B60G2206/724 ,  B60G2206/81035 ,  B60G2206/8402 ,  B60G2206/8403 ,  C21D1/60 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D7/06 ,  C21D8/065 ,  C21D9/0075 ,  C21D9/02 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54 ,  C22C38/60 ,  F16F1/14

Abstract: This stabilizer (1) is formed using a solid metal rod, is for suppressing left/right wheel displacement, and is provided extending in the vehicle width direction. The diameter of a torsion section (1a) that twist-deforms is 10-32 mm. The stabilizer has a chemical composition including at least 0.15%-0.39% by mass C and including at least Mn, B, and Fe. At least 90% of the metal structure thereof has a martensite structure.

Abstract translation: 该稳定器（1）由固体金属棒形成，用于抑制左右轮的位移，并且设置成在车宽方向上延伸。 扭转变形的扭转部分（1a）的直径为10-32mm。 稳定剂具有包含至少0.15％至0.39质量％C且至少包含Mn，B和Fe的化学组成。 其金属结构的至少90％具有马氏体结构。

公开(公告)号：EP3214189A1

公开(公告)日：2017-09-06

申请号：EP15855119.2

申请日：2015-10-26

Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) ,  NHK Spring Co., Ltd.

Inventor： KOCHI, Takuya ,  HATANO, Hitoshi ,  TANGE, Akira ,  KURIMOTO, Kiyoshi ,  GOTO, Yurika

IPC: C21D9/02 ,  C21D9/08 ,  C22C38/00 ,  C22C38/50

CPC classification number: C21D9/08 ,  C21D6/005 ,  C21D6/008 ,  C21D9/02 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/20 ,  C22C38/40 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

Abstract: To provide a method for manufacturing steel for a high-strength hollow spring that exhibits excellent resistance to hydrogen embrittlement. Disclosed is a method for manufacturing steel for a hollow spring obtained by quenching and tempering a seamless pipe for use as a material of the hollow spring, wherein the seamless pipe including predetermined components is subjected to a heat treatment is performed to satisfy quenching conditions (1) mentioned below, and to satisfy tempering conditions (2) mentioned below,
(1) quenching conditions: 26 , 000 ≤ T 1 + 273 × log t 1 + 20 ≤ 29 , 000 900 °C ≤ T 1 ≤ 1 , 050 °C , 10 seconds ≤ t 1 ≤ 1 , 800 seconds , 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 ≤ T 2 + 273 × log t 2 + 20 ≤ 15 , 500 T 2 ≤ 550 °C , and t 2 ≤ 3 , 600 seconds , where T2 is a tempering temperature (°C), and t2 is a total time (seconds) from start of heating to completion of cooling.

Abstract translation: 提供一种表现出优异的耐氢脆性的高强度空心弹簧用钢的制造方法。 本发明提供一种空心弹簧用钢的制造方法，该空心弹簧用钢通过对作为中空弹簧的材质的无缝管进行淬火回火而得到，其中，对含有规定成分的无缝管实施热处理，以满足淬火条件（1 ），满足下述回火条件（2），（1）淬火条件：26,000≤T1+ 273×logt1 +20≤29,000900℃≤T1≤1,050℃，10秒≤t1≤1,800秒，其中 T1是淬火温度（℃），t1是在900℃以上的温度范围内的保持时间（秒），和（2）回火条件：13,000≤T2+ 273×logt2 +20≤15,500T2≤ 550℃，t2≤3,600秒，其中T2是回火温度（℃），t2是从加热开始到冷却结束的总时间（秒）。

公开(公告)号：EP2639328A1

公开(公告)日：2013-09-18

申请号：EP11839745.4

申请日：2011-10-21

Applicant: NHK Spring Co., Ltd.

Inventor： OKADA, Hideki ,  TANGE, Akira ,  TANGO, Koichi ,  SUMIYOSHI, Isao

IPC: C22C38/50 ,  C21D7/06 ,  C21D9/02 ,  F16F1/06

CPC classification number: 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

Abstract: A steel for high-strength spring has an Ac 3 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.



wherein, D 0 = 8.65 × C , f Si =1+0.64×Si, f Mn =1+4.10×%Mn, f P =1+2.83×%P, f S =1-0.62×%S, f Cu =1+0.27×%Cu, f Ni =1+0.52×%Ni, and f Cr =1+2.33×%Cr.

Abstract translation: 一种用于高强度弹簧钢具有Ac3相变温度如在脱碳性能的指标，在​​所有这是由方程（1）的下方，是从859至885℃的最大硬化直径DI计算为硬化的指示器 这是由方程计算性能，在所有（2）所示，是从70至238毫米，和回火硬度HRC如弹簧性能，所有的指示器，其由等式（3）计算的下方，为50〜55 worin， D 0 = 8.65×C，硅F = 1 + 0.64×硅，锰= F 1 + 4.10×％的Mn，P F = 1 + 2.83×％S = F×1-0.62％S，F的Cu P，= 1 + 0:27×％铜，镍F = 1 + 0:52×％的Ni，及Cr F = 1 + 2:33×％的Cr。

公开(公告)号：EP1459846B1

公开(公告)日：2012-11-14

申请号：EP02783707.9

申请日：2002-11-29

Applicant: NHK Spring Co., Ltd.

Inventor： AKEDA, Mamoru ,  YANO, Junichi ,  OKUYAMA, Isamu ,  TANGE, Akira

IPC: B24C1/10 ,  B60G11/02 ,  C21D7/06 ,  C21D9/02

CPC classification number: C21D9/02 ,  C21D1/18 ,  C21D1/30 ,  C21D7/06 ,  Y10S148/908 ,  Y10T29/479 ,  Y10T29/49863

公开(公告)号：EP1201773B1

公开(公告)日：2009-04-22

申请号：EP00937195.6

申请日：2000-06-08

Applicant: NHK SPRING CO., LTD.

Inventor： TANGE, Akira ,  ANDO, Kotoji ,  WATANABE, Koji

IPC: C21D7/06

CPC classification number: C21D9/02 ,  C21D7/06 ,  F16F1/021 ,  F16F2226/00 ,  Y10S148/908 ,  Y10T29/479

Abstract: Spring steel having a hardness expressed by a Brinell ball indentation diameter of at least 2.7 mm is kept insulated at 150 to 350 DEG C, and is subjected to warm stress peening with a stress given to the spring steel at the above temperature.

公开(公告)号：EP3438320A1

公开(公告)日：2019-02-06

申请号：EP17773782.2

申请日：2017-02-15

Applicant: NHK Spring Co., Ltd.

Inventor： KAI, Morimichi ,  TANGE, Akira

IPC: C23C8/22 ,  C21D1/06 ,  C21D9/02 ,  F16F1/06 ,  F16F1/14

Abstract: 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 (10) for a vehicle includes a steel tube (10P) sealed at one end and another end (11, 12) thereof and a carburizing gas sealed in the interior space (13) of the steel tube (10P).

公开(公告)号：EP3150880A1

公开(公告)日：2017-04-05

申请号：EP14893187.6

申请日：2014-05-28

Applicant: NHK Spring Co., Ltd.

Inventor： TANGE, Akira ,  OKADA, Hideki

IPC: F16F1/12 ,  F16F1/00 ,  F16F15/06 ,  F16F15/067

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

Abstract: A compressive residual stress portion (50) having a compressive residual stress from a surface of a wire (40) to a first depth (D1) is formed between end turn portions (12a, 12b) of a coil spring (12). The end turn portion (12a) includes a first portion (12a 1 ), a second portion (12a 2 ), and a third portion (12a 3 ). The first portion (12a 1 ) is always in contact with a spring seat irrespective of a load applied to the coil spring (12). The second portion (12a 2 ) contacts the spring seat when the load applied to the coil spring (12) is large, and is separated from the spring seat when the load is small. The third portion (12a 3 ) is always separated from the spring seat irrespective of the magnitude of the load. In the end turn portion (12a), in a region including the second portion (12a 2 ), a deep residual stress portion (51) is formed by ultrasonic shot peening. The deep residual stress portion (51) has a compressive residual stress from a surface of the wire (40) to a second depth (D2) deeper than the first depth (D1).

Abstract translation: 在螺旋弹簧（12）的端部匝部（12a，12b）之间形成有从线（40）的表面到第一深度（D1）的压缩残余应力的压缩残余应力部分（50）。 端部转弯部分（12a）包括第一部分（12a 1），第二部分（12a 2）和第三部分（12a 3）。 第一部分（12a 1）始终与弹簧座接触，而不管施加到螺旋弹簧（12）的负载。 当施加到螺旋弹簧（12）的负载较大时，第二部分（12a 2）接触弹簧座，并且当负载小时与弹簧座分离。 不管负载的大小如何，第三部分（12a 3）始终与弹簧座分离。 在末端转弯部分（12a）中，在包括第二部分（12a 2）的区域中，通过超声波喷丸硬化形成深残余应力部分（51）。 深残余应力部分（51）具有从线（40）的表面到比第一深度（D1）更深的第二深度（D2）的压缩残余应力。

公开(公告)号：EP3045556A1

公开(公告)日：2016-07-20

申请号：EP14844852.5

申请日：2014-09-11

Applicant: JFE Steel Corporation ,  Sumihatsu Co., Ltd. ,  NHK Spring Co., Ltd.

Inventor： HONJO, Minoru ,  UWAI, Kiyoshi ,  ENDO, Shigeru ,  YAMASHITA, Katsutoshi ,  TSURU, Koei ,  FUJIE, Keiichi ,  TANGE, Akira

IPC: C22C38/00 ,  C21D8/06 ,  C22C38/60 ,  F16F1/02 ,  C21D9/02

CPC classification number: C22C38/60 ,  C21D1/18 ,  C21D1/25 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/06 ,  C21D8/065 ,  C21D9/02 ,  C21D9/525 ,  C22C38/00 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  F16F1/02 ,  F16F1/021

Abstract: 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.

Abstract translation: 通过优化C，Si，Mn和Cr以及Sb和Sn的添加量，与传统的用于弹簧的高强度钢相比，提供了用于弹簧的高强度钢具有优异的抗脱碳性和氧化皮剥离性。 弹簧用钢含有C：超过0.45质量％且小于0.65质量％，Si：0.15质量％以上且0.70质量％以下，Mn：0.10质量％以上且1.00质量％以下，Cr：0.20 质量％以上且1.50质量％以下，P：0.025质量％以下，S：0.025质量％以下，O：0.0015质量％以下，Sb：0.010质量％以上且小于0.030质量％， Sn：规定条件下为0.010质量％以上且0.030质量％以下。