公开(公告)号：US5853660A

公开(公告)日：1998-12-29

申请号：US542828

申请日：1995-10-13

申请人： Yasuo Murakami ,  Nobuaki Mitamura ,  Seiji Sato

发明人： Yasuo Murakami ,  Nobuaki Mitamura ,  Seiji Sato

IPC分类号： F16C33/62 ,  C21D1/18 ,  C21D1/32 ,  C21D1/78 ,  C21D9/40 ,  C22C38/00 ,  C22C38/18

CPC分类号： C22C38/18 ,  C21D1/78 ,  C21D9/40 ,  C21D1/18 ,  C21D1/32 ,  Y10S148/906

摘要： A bearing steel includes 0.70 to 0.93 wt % of C, 0.15 to 0.50 wt % of Si, 0.50 to 1.10 wt % of Mn and 0.3 to 0.65 wt % of Cr, with the balance being Fe and incidental impurities, and it has the ratio Cr/C specified to fall within 0.4 to 0.7. Because of these compositional features, the generation of macro carbides is prevented and the need to perform soaking at high temperature for a prolonged time is eliminated. Further, the bearing steel saves the materials cost and the overall cost of heat treatments in the manufacture of bearings and which yet is capable of satisfying the requirements of various characteristics of bearings, as well as a rolling bearing that employs the bearing steel.

摘要翻译： 轴承钢包括C：0.70〜0.93重量％，Si：0.15〜0.50重量％，Mn：0.50〜1.10重量％，Cr：0.3〜0.65重量％，余量：Fe和附带杂质， Cr / C规定为0.4〜0.7。 由于这些组成特征，防止了大量碳化物的产生，并且消除了在高温下长时间浸泡的需要。 此外，轴承钢节省了轴承制造中的材料成本和热处理的总体成本，并且能够满足轴承的各种特性的要求，以及采用轴承钢的滚动轴承。

公开(公告)号：US06478894B1

公开(公告)日：2002-11-12

申请号：US09358554

申请日：1999-07-22

申请人： Nobuaki Mitamura ,  Kazuo Sekino ,  Yasuo Murakami

发明人： Nobuaki Mitamura ,  Kazuo Sekino ,  Yasuo Murakami

IPC分类号： C22C3822

CPC分类号： F16C33/32 ,  F16C33/62 ,  F16C2360/24 ,  Y10T29/53104

摘要： At least any one of a bearing member (inner race, outer race and rolling element) is formed with a steel material containing 0.2 to 1.2 wt % of C, 0.7 to 1.5 wt % of Si, 0.5 to 1.5 wt % of Mo, 0.5 to 2.0 wt % of Cr, and 12 ppm or less of O. The bearing member is treated with carbonitriding, and thereafter, quenching and tempering so as to provide carbon concentration in the steel surface being 0.8 to 1.3 wt % and nitrogen concentration on the same being 0.2 to 0.8 wt %.

摘要翻译： 轴承部件（内圈，外圈，滚动体）中的至少任一方形成有含有0.2〜1.2重量％的C，0.7〜1.5重量％的Si，0.5〜1.5重量％的Mo，0.5 2.0重量％的Cr和12ppm以下的O。将轴承部件用碳氮共渗处理，然后进行淬火回火，使钢表面的碳浓度为0.8〜1.3重量％，氮浓度为 相同为0.2〜0.8重量％。

公开(公告)号：US5427457A

公开(公告)日：1995-06-27

申请号：US134588

申请日：1993-10-12

申请人： Kyozaburo Furumura ,  Yasuo Murakami ,  Nobuaki Mitamura ,  Shinichi Shirota ,  Shigeru Okita ,  Kazuo Sekino

发明人： Kyozaburo Furumura ,  Yasuo Murakami ,  Nobuaki Mitamura ,  Shinichi Shirota ,  Shigeru Okita ,  Kazuo Sekino

IPC分类号： C21D1/78 ,  C21D6/00 ,  C21D9/36 ,  C21D9/40 ,  C23C8/32 ,  C23C8/80 ,  F16C33/30 ,  F16C33/32 ,  F16C33/34 ,  F16C33/62 ,  F16C19/00

CPC分类号： F16C33/32 ,  C21D9/36 ,  C21D9/40 ,  C23C8/32 ,  C23C8/80 ,  F16C33/30 ,  F16C33/34 ,  F16C33/62 ,  C21D1/78 ,  C21D2211/001 ,  C21D6/002 ,  Y10S384/912 ,  Y10S384/913

摘要： An object of this invention is to provide a rolling bearing in which, as for the rolling elements, it is unnecessary to employ a high level heat treatment such as carburizing or carbonitriding which requires a long period of time to achieve, and which is sufficiently long in service life even when used with a lubricant containing foreign matters. In a rolling bearing, the amount of residual austenite (.gamma..sub.R vol %) in the surface layer of at least one of the inner and outer races is in a range of 25 to 40 vol %, and the surface hardness (Hv) thereof meets the following condition:-4.7.times.(.gamma..sub.R vol %)+900.ltoreq.Hv.ltoreq.-4.7.times.(.gamma..sub.R vol %)+1000and the hardness of the rolling elements combined with the inner and outer races is higher by H.sub.R C 1 to 2 than that of the one of the inner and outer races.

摘要翻译： 本发明的目的是提供一种滚动轴承，其中对于滚动元件，不需要采用需要较长时间来实现并且足够长的高渗透度或碳氮共渗的高水平热处理 使用寿命即使与含有外来物质的润滑剂一起使用。 在滚动轴承中，至少一个内圈和外圈的表层中的残余奥氏体量（γR vol％）在25〜40vol％的范围内，其表面硬度（Hv）满足 以下条件：-4.7倍（γR vol％）+ 900

公开(公告)号：US07137741B2

公开(公告)日：2006-11-21

申请号：US10310900

申请日：2002-12-06

申请人： Shinji Fujita ,  Youichi Matsumoto ,  Yasuo Murakami ,  Nobuaki Mitamura ,  Shigeru Okita

发明人： Shinji Fujita ,  Youichi Matsumoto ,  Yasuo Murakami ,  Nobuaki Mitamura ,  Shigeru Okita

IPC分类号： F16C33/58 ,  F16C33/32 ,  F16C33/00

CPC分类号： F16C33/30 ,  F16C33/62

摘要： A rolling bearing intended for longer life by improving seizure resistance and wear resistance in the circumstance with slip contact or in the circumstance where lubricant tends to be exhausted, which is manufactured by applying carburization or carbonitridation to an Si-added material to disperse and precipitate carbides or carbonitrides containing Si or Si—X (X=one or more of Mn, Mo, and Cr) thereby improving the seizure resistance and the wear resistance by the self-lubrication effect thereof, the size of the carbides or carbonitrides being preferably 10 μm or less for preventing flaking, and the area ratio for the carbides or carbonitrides being preferably 1.0–30% for obtaining sufficient self-lubrication effect.

公开(公告)号：US6165100A

公开(公告)日：2000-12-26

申请号：US187607

申请日：1998-11-06

申请人： Nobuaki Mitamura ,  Tomonobu Yoshikawa ,  Yasuo Murakami

发明人： Nobuaki Mitamura ,  Tomonobu Yoshikawa ,  Yasuo Murakami

IPC分类号： F16H15/38 ,  F16H55/32

CPC分类号： F16H15/38

摘要： At least one of input/output disks, a power roller and a cam disk of a toroidal type continuously variable transmission is formed of a high-cleanness steel in which a size of a maximum inclusion is estimated by the following extremum statistical process. In step S1, a plane including a central line of the high-cleanness steel is cut out in a direction of rolling of the high-cleanness steel. In step S2, a portion d of the cut-out cross-section, which is defined by 40% of a diameter D in the vicinity of the central line, is used as a to-be-tested surface. In step S3, a test reference area S.sub.0 is set at an area not less than 300 mm.sup.2 within the to-be-tested surface, and a root of an area of the maximum inclusion is measured five times or more. In step S4, a maximum inclusion distribution straight line is obtained. In step S5, the root, that is, the size of the area of the maximum inclusion within an estimation area S is estimated.

摘要翻译： 输入/输出盘，动力辊和环形无级变速器的凸轮盘中的至少一个由高清洁度钢形成，其中通过以下极值统计过程估计最大夹杂物的尺寸。 在步骤S1中，在高洁净度钢的轧制方向上切断包括高洁净度钢的中心线的平面。 在步骤S2中，作为待测试表面，使用由中心线附近的直径D的40％定义的切口横截面的部分d。 在步骤S3中，将测试基准区域S0设定在待测试表面内的不小于300mm 2的区域，并且测量最大夹杂物的面积的根数是五次以上。 在步骤S4中，获得最大夹杂物分布直线。 在步骤S5中，估计根，即估计区域S内的最大包含区域的大小。

公开(公告)号：US5989694A

公开(公告)日：1999-11-23

申请号：US877950

申请日：1997-06-17

申请人： Nobuaki Mitamura ,  Kazuo Sekino ,  Yasuo Murakami

发明人： Nobuaki Mitamura ,  Kazuo Sekino ,  Yasuo Murakami

IPC分类号： C22C38/22 ,  F16C33/30 ,  F16C19/49

CPC分类号： C22C38/22 ,  F16C33/30 ,  F16C33/62 ,  Y10S148/906 ,  Y10S384/907 ,  Y10S384/912 ,  Y10S384/913 ,  Y10T428/24942 ,  Y10T428/24983 ,  Y10T428/25

摘要： Disclosed is a rolling bearing comprising races and rolling elements, in which at least one of the races and the rolling elements has at least one of a carbide and a carbonitride precipitated in a surface layer thereof, inclusive of a cutting allowance, wherein the finished surface of at least one of the races and the rolling elements has a hardness of Hv600 to Hv700 at 300.degree. C. The rolling bearing has reliable wear resistance under severe conditions and thereby having an extended bearing life.

摘要翻译： 公开了一种滚动轴承，其包括种族和滚动元件，其中至少一个种类和滚动元件具有在其表面层中析出的碳化物和碳氮化物中的至少一种，包括切割余量，其中成品表面 的至少一个座圈和滚动元件在300℃下具有Hv600至Hv700的硬度。滚动轴承在恶劣条件下具有可靠的耐磨性，从而具有延长的轴承寿命。

公开(公告)号：US5030017A

公开(公告)日：1991-07-09

申请号：US557574

申请日：1990-07-24

申请人： Yasuo Murakami ,  Nobuaki Mitamura

发明人： Yasuo Murakami ,  Nobuaki Mitamura

IPC分类号： C23C8/22 ,  C23C8/32 ,  F16C33/30 ,  F16C33/62

CPC分类号： F16C33/30 ,  C23C8/22 ,  C23C8/32 ,  F16C33/62 ,  Y10S384/912 ,  Y10S384/913

摘要： A rolling bearing has races and a rolling element. At least one of the races and the rolling element is made of a carburized or carbonitrided alloy steel. The content of a fine carbide present in the surface layer of the one element of the rolling bearing is 20-50 vol %. The content of retained austenite in the surface layer is 10-25 vol %. The rolling bearing provides a long-life rolling bearing suitable for use in a transmission and engine.

摘要翻译： 滚动轴承具有滚道和滚动体。 至少一个座圈和滚动元件由渗碳或碳氮共渗合金钢制成。 存在于滚动轴承的一个元件的表面层中的细小碳化物的含量为20〜50体积％。 表面层中残留奥氏体的含量为10-25vol％。 滚动轴承提供适用于变速箱和发动机的长寿命滚动轴承。

公开(公告)号：US07037386B2

公开(公告)日：2006-05-02

申请号：US10410342

申请日：2003-04-10

申请人： Susumu Tanaka ,  Nobuaki Mitamura ,  Hiromichi Takemura ,  Yoshitaka Hayashi ,  Yasuo Murakami

发明人： Susumu Tanaka ,  Nobuaki Mitamura ,  Hiromichi Takemura ,  Yoshitaka Hayashi ,  Yasuo Murakami

IPC分类号： C22C38/24 ,  C22C38/46

CPC分类号： F16C33/62 ,  C21D9/36 ,  C21D9/40 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  F16C33/30 ,  F16C33/6688 ,  F16C2361/63 ,  F16C2361/65 ,  Y10S148/906 ,  Y10S384/912

摘要： A rolling bearing for belt-type continuously variable transmission with a metal belt including pieces has an inner ring; an outer ring; and rolling elements, wherein at least one of the inner ring, the outer ring and the rolling element is made of an iron alloy having a chromium content of from 2.5 to 20.0% by weight.

公开(公告)号：US20050207687A1

公开(公告)日：2005-09-22

申请号：US10895410

申请日：2004-07-21

申请人： Shinji Fujita ,  Yoshiaki Sakajiri ,  Susumu Tanaka ,  Youichi Matsumoto ,  Nobuaki Mitamura ,  Yasuo Murakami ,  Kenichi Iso

发明人： Shinji Fujita ,  Yoshiaki Sakajiri ,  Susumu Tanaka ,  Youichi Matsumoto ,  Nobuaki Mitamura ,  Yasuo Murakami ,  Kenichi Iso

IPC分类号： F16C29/06 ,  F16C33/58 ,  F16C33/62

CPC分类号： F16C33/585 ,  F16C19/06 ,  F16C33/62 ,  F16C2204/66 ,  F16C2240/54

摘要： The centerline average roughness of the raceway surface of at least the fixed ring of bearing rings is controlled to be 0.025 to 0.075 μmRa, thereby suppressing the rotation slip of the rolling elements so as to prevent flaking that is accompanied by a structural change. This enables prolongation of the life of bearings. At least the fixed ring of the bearing rings contains, as alloy ingredients at a ratio of from 0.50 to 1.20% by mass of carbon, from 0.10 to 1.50% by mass of silicon, from 0.1 to 2.0% by mass of manganese, from 3.0 to 6.0% by mass of chromium, 2.0% by mass or less of molybdenum, and 1.0% by mass or less of vanadium, whereby the necessary hardness is obtained and the structure is stabilized. This enables prolongation of the life of bearings.

摘要翻译： 将至少轴承环的固定环的轨道面的中心线平均粗糙度控制在0.025〜0.075μmRa，从而抑制滚动体的旋转滑动，以防止伴随结构变化的剥落。 这样可以延长轴承的使用寿命。 至少所述轴承环的固定环包含作为合金成分的比例为0.50〜1.20质量％的碳，0.10〜1.50质量％的硅，0.1〜2.0质量％的锰，3.0 至6.0质量％的铬，2.0质量％以下的钼和1.0质量％以下的钒，由此得到所需的硬度，结构稳定。 这样可以延长轴承的使用寿命。

公开(公告)号：US06332714B1

公开(公告)日：2001-12-25

申请号：US09339238

申请日：1999-06-24

申请人： Hiromichi Takemura ,  Nobuaki Mitamura ,  Yasuo Murakami ,  Tomonobu Yoshikawa ,  Shuhei Kitano ,  Kazuhiko Hiraoka

发明人： Hiromichi Takemura ,  Nobuaki Mitamura ,  Yasuo Murakami ,  Tomonobu Yoshikawa ,  Shuhei Kitano ,  Kazuhiko Hiraoka

IPC分类号： F16C3332

CPC分类号： F16C29/005 ,  C21D1/10 ,  C21D9/40 ,  F16C33/62 ,  F16C33/64 ,  Y02P10/253 ,  Y10S384/913

摘要： An induction-hardened rolling bearing device used by disposing rolling elements in a raceway track member, with excellent cold drawability and improved wear resistance and extended service life, in which ingredients of an alloy for the raceway track member contain, from 0.40 to 0.90% of C, from 0.05 to 0.80% of Si, from 0.10 to 2.0% of Mn, from 0.05 to 0.50% of Ti and 0.03% or less of N, on the weight basis, induction hardening is applied at least to the raceway surface of the raceway track member, and Ti carbide and Ti carbonitride each having an average particle diameter of from 5 to 100 nm are dispersed on the surface and in the steels of the raceway track member to make the hardness of the raceway surface to HRC 59 or more.

摘要翻译： 一种感应淬火滚动轴承装置，其用于在滚道轨道构件中设置滚动元件，具有优异的可拉伸性和改善的耐磨性，并且延长了使用寿命，其中用于轨道轨道构件的合金的成分含有0.40至0.90％ C，0.05〜0.80％的Si，0.10〜2.0％的Mn，0.05〜0.50％的Ti和0.03％以下的N，以重量计，至少施加至 轨道轨道构件和平均粒径为5〜100nm的Ti碳化物和碳氮化钛分散在轨道轨道构件的表面和钢中，使得轨道面的硬度达到HRC 59以上。