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公开(公告)号：US11285776B2
公开(公告)日：2022-03-29
申请号：US16146269
申请日：2018-09-28
Applicant: NHK SPRING CO., LTD.
Inventor： Akira Tange , Masato Sugawara , Yutaka Wakabayashi
IPC: B60G21/055 , F16F1/02 , F16F1/14 , B23P23/04
Abstract: 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.
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公开(公告)号：US10415110B2
公开(公告)日：2019-09-17
申请号：US15560273
申请日：2016-03-16
Applicant: NHK Spring Co., Ltd.
Inventor： Yutaka Wakabayashi , Ken Takahashi , Masato Sugawara , Hideki Okada
Abstract: A method of manufacturing a hollow stabilizer includes a forming step of subjecting an element pipe to a bending process, to form a product shape including bent portions, and a quenching step of quenching the element pipe subjected to the bending process. In the quenching step, a cooling process is performed by immersing the element pipe made of steel in coolant and by spraying the coolant to an outer surface of the bent portion.
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3.发明申请HOLLOW STABILIZER, AND STEEL PIPE FOR HOLLOW STABILIZERS AND METHOD OF PRODUCING THE SAME 审中-公开中空稳定器和中空稳定器的钢管及其生产方法公开(公告)号：US20150176101A1
公开(公告)日：2015-06-25
申请号：US14402745
申请日：2013-02-25
Inventor： Tetsuo Ishitsuka , Motofumi Koyuba , Masamichi Iwamura , Akira Tange , Ken Takahashi , Kiyoshi Kurimoto , Yutaka Wakabayashi
IPC: 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 classification number: 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
Abstract: 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.
Abstract translation: 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。
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Patent Agency Ranking
公开(公告)号：US20180117983A1
公开(公告)日：2018-05-03
申请号：US15560892
申请日：2016-03-16
Applicant: NHK Spring Co., Ltd.
Inventor： Yutaka Wakabayashi , Ken Takahashi , Masato Sugawara , Hideki Okada
IPC: B60G21/055 , C21D9/08
CPC classification number: B60G21/055 , B21D7/165 , B21D53/88 , B60G2206/012 , B60G2206/427 , B60G2206/724 , B60G2206/8402 , C21D9/08 , C21D9/085
Abstract: A hollow stabilizer has a tubular shape and is provided with a torsion section that is provided to a vehicle and that extends in the vehicle width direction; an arm section that extends in the front-back direction of the vehicle; and bent sections that connect the torsion section and the arm section. The hardness of the outer surface of the bent inner sides of the bent sections of the hollow stabilizer is 70% or more with respect to the hardness of the outer surface of the arm section.
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公开(公告)号：US20180073096A1
公开(公告)日：2018-03-15
申请号：US15560273
申请日：2016-03-16
Applicant: NHK Spring Co., Ltd.
Inventor： Yutaka Wakabayashi , Ken Takahashi , Masato Sugawara , Hideki Okada
CPC classification number: C21D9/08 , B21D7/00 , B21D7/165 , B21D53/88 , B60G21/055 , B60G2206/427 , B60G2206/724 , B60G2206/8103 , B60G2206/8402 , B60G2206/8403 , C21D1/60 , C23C8/46
Abstract: A method of manufacturing a hollow stabilizer includes a forming step of subjecting an element pipe to a bending process, to form a product shape including bent portions, and a quenching step of quenching the element pipe subjected to the bending process. In the quenching step, a cooling process is performed by immersing the element pipe made of steel in coolant and by spraying the coolant to an outer surface of the bent portion.
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公开(公告)号：US20150184267A1
公开(公告)日：2015-07-02
申请号：US14423941
申请日：2013-08-01
Applicant: NHK SPRING CO., LTD.
Inventor： Yoshihiro Koshita , Yutaka Wakabayashi , Kosuke Takeo , Koichi Ito
IPC: C21D9/08 , B60G21/055 , C22C38/00 , C21D1/40 , C21D9/00
CPC classification number: C21D9/08 , B60G21/055 , B60G2202/135 , B60G2206/80 , B60G2206/81062 , C21D1/18 , C21D1/40 , C21D9/0068 , C21D9/0075 , C21D9/02 , C22C38/00
Abstract: Provided are a method for manufacturing a stabilizer and a heating device, the method being able to suppress the occurrence of unevenness in the hardness of a curved portion of a semimanufactured product of the stabilizer and reduce the process time in a tempering process. In electric heating in a first heating step (step A), the temperature of an inside portion of a shoulder can be steeply increased to a temperature (
Abstract translation: 提供一种制造稳定剂和加热装置的方法，该方法能够抑制稳定剂的半制品的弯曲部分的硬度不均匀的发生，并且在回火过程中减少处理时间。 在第一加热步骤（步骤A）中的电加热中，肩部的内部部分的温度可以通过连续通过电流而急剧增加到接近目标温度（UA）的温度（
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公开(公告)号：US10442269B2
公开(公告)日：2019-10-15
申请号：US15560892
申请日：2016-03-16
Applicant: NHK Spring Co., Ltd.
Inventor： Yutaka Wakabayashi , Ken Takahashi , Masato Sugawara , Hideki Okada
IPC: B60G21/055 , B21D53/88 , C21D9/08 , B21D7/16
Abstract: A hollow stabilizer has a tubular shape and is provided with a torsion section that is provided to a vehicle and that extends in the vehicle width direction; an arm section that extends in the front-back direction of the vehicle; and bent sections that connect the torsion section and the arm section. The hardness of the outer surface of the bent inner sides of the bent sections of the hollow stabilizer is 70% or more with respect to the hardness of the outer surface of the arm section.
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公开(公告)号：US09273372B2
公开(公告)日：2016-03-01
申请号：US14423941
申请日：2013-08-01
Applicant: NHK SPRING CO., LTD.
Inventor： Yoshihiro Koshita , Yutaka Wakabayashi , Kosuke Takeo , Koichi Ito
CPC classification number: C21D9/08 , B60G21/055 , B60G2202/135 , B60G2206/80 , B60G2206/81062 , C21D1/18 , C21D1/40 , C21D9/0068 , C21D9/0075 , C21D9/02 , C22C38/00
Abstract: Provided are a method for manufacturing a stabilizer and a heating device, the method being able to suppress the occurrence of unevenness in the hardness of a curved portion of a semimanufactured product of the stabilizer and reduce the process time in a tempering process. In electric heating in a first heating step (step A), the temperature of an inside portion of a shoulder can be steeply increased to a temperature (
Abstract translation: 提供一种制造稳定剂和加热装置的方法，该方法能够抑制稳定剂的半制品的弯曲部分的硬度不均匀的发生，并且在回火过程中减少处理时间。 在第一加热步骤（步骤A）中的电加热中，肩部的内部部分的温度可以通过连续通过电流而急剧增加到接近目标温度（UA）的温度（
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