公开(公告)号：US06770152B1

公开(公告)日：2004-08-03

申请号：US09830212

申请日：2001-04-24

申请人： Shigeru Okita ,  Akihiro Kiuchi ,  Hiromichi Takemura ,  Tomonobu Yoshikawa

发明人： Shigeru Okita ,  Akihiro Kiuchi ,  Hiromichi Takemura ,  Tomonobu Yoshikawa

IPC分类号： C22C3822

CPC分类号： C22C38/02 ,  C21D1/18 ,  C21D1/25 ,  C21D6/04 ,  C21D9/36 ,  C21D9/38 ,  C21D9/40 ,  C21D2211/001 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/04 ,  C22C38/22 ,  C22C38/34 ,  C23C8/32 ,  C23C8/80 ,  F16C33/62 ,  Y10S148/906

摘要： The present invention provides a rolling bearing having high wear resistance at high temperature and with reduced manufacturing cost. At least one of an inner ring, an outer ring and rolling elements is formed of the following steel material into a predetermined shape, then applied with hardening and tempering at a temperature of 240° C. or higher or 350° C. or lower to make the Vickers hardness (Hv) on the raceway surface and/or rolling surface to 720 or more. The steel material contains, as the alloy ingredient, 0.8% by weight or more and 1.2% by weight or less of C, 0.5% by weight or more and 2.5% by weight or less of Si, 0.7% by weight or more and 1.5% by weight or less of Cr, 0.8% by weight or more and 2.0% by weight or less of Mo and 0.3% by weight or more and 1.2% by weight or less of Mn, with a ratio of Mo to Cr (Mo/Cr: weight ratio) of 1.1 or more.

摘要翻译： 本发明提供一种在高温下具有高耐磨性且降低制造成本的滚动轴承。 内圈，外圈和滚动元件中的至少一个由以下钢材形成为预定形状，然后在240℃以上或350℃以下的温度下进行淬火回火 使维氏硬度（Hv）在滚道表面和/或滚动面上达到720以上。 钢材含有0.8重量％以上且1.2重量％以下的C，0.5重量％以上且2.5重量％以下的Si，0.7重量％以上且1.5以下 重量％以下的Cr，0.8重量％以上且2.0重量％以下的Mo和0.3重量％以上且1.2重量％以下的Mn，Mo与Cr的比例（Mo / Cr：重量比）为1.1以上。

公开(公告)号：US06440233B2

公开(公告)日：2002-08-27

申请号：US09817250

申请日：2001-03-27

申请人： Shigeru Okita ,  Susumu Tanaka ,  Tomonobu Yoshikawa

发明人： Shigeru Okita ,  Susumu Tanaka ,  Tomonobu Yoshikawa

IPC分类号： C12D936

CPC分类号： F16C33/62 ,  C21D9/40 ,  C23C8/32 ,  Y10S148/906

摘要： An inner ring and an outer ring are composed as follows. These members are fabricated with a steel for bearing containing carbon 0.6 wt % or higher. A carbonitrided layer is formed in a raceway surface. The amount of residual austenite at a position of 2% Da depth in the raceway surface is determined to be 1.0 vol % or lower. Hardness at the position of 2% Da depth is set to be HRC58 or more. Nitrogen content (Np) at the position of 2% Da depth is 0.05 wt % or more. A multiple Gd of an impression resistance expressed with the following formula (1) is 1.6 or more, Gd=(H0.2/500)+2·Np  (1), wherein in the formula, H0.2 is meant by Vickers hardness at the position of 2% Da depth.

摘要翻译： 内环和外圈组成如下。 这些构件用含有0.6重量％以上的碳的轴承的钢制成。 在轨道表面形成碳氮共渗层。 轨道面中2％Da深度位置处的残余奥氏体量为1.0体积％以下。 2％Da深度位置的硬度为HRC58以上。 2％Da深度位置的氮含量（Np）为0.05重量％以上。 用下式（1）表示的耐冲击强度的多重Gd为1.6以上，其中，在式中，H0.2是指在2％Da深度的位置处的维氏硬度。

公开(公告)号：US06659909B2

公开(公告)日：2003-12-09

申请号：US10194676

申请日：2002-07-11

申请人： Shigeru Okita ,  Tomonobu Yoshikawa ,  Yutaka Ishii

发明人： Shigeru Okita ,  Tomonobu Yoshikawa ,  Yutaka Ishii

IPC分类号： F16H5532

CPC分类号： C21D9/0068 ,  C21D1/18 ,  F16H15/38

摘要： A toroidal continuously variable transmission system of the present invention is provided with an input disk, an output disk and power rollers. The input and output disks have traction surfaces defined between a small-diameter portion and a large-diameter portion and having an arc-shaped concave section. The input and output disks are coaxially arranged in such a manner that the traction surfaces face each other. The power roller are frictionally engagement with the traction surfaces of the input and output disks and transmit a driving force. At least one of the input disk, the output disk and the power rollers is formed of an alloy steel which contains 0.15 to 2.0% by weight of Mo. The alloy steel is subjected first to carburization or carbonitriding processing executed at a temperature not lower than 1,000° C., and then to hardening and tempering. The alloy steel has a surface carbon content of 0.8 to 1.4%.

摘要翻译： 本发明的环形无级变速器系统设置有输入盘，输出盘和动力辊。 输入和输出盘具有限定在小直径部分和大直径部分之间并具有弧形凹部的牵引表面。 输入和输出盘以这样的方式同轴布置，使得牵引表面彼此面对。 动力辊与输入和输出盘的牵引表面摩擦接合并传递驱动力。 输入盘，输出盘和动力辊中的至少一个由含有0.15〜2.0重量％的Mo的合金钢形成。合金钢首先进行渗碳或碳氮共渗处理，其温度不低于 1000℃，然后进行硬化和回火。 合金钢的表面碳含量为0.8〜1.4％。

公开(公告)号：US6101719A

公开(公告)日：2000-08-15

申请号：US242817

申请日：1999-02-25

申请人： Akihiro Kiuchi ,  Shigeru Okita ,  Kenji Yamamura

发明人： Akihiro Kiuchi ,  Shigeru Okita ,  Kenji Yamamura

IPC分类号： C22C38/22 ,  C22C38/24 ,  C23C8/22 ,  C23C8/80 ,  F16C33/30 ,  F16C33/62 ,  B21K1/02

CPC分类号： C22C38/24 ,  C22C38/22 ,  C23C8/22 ,  C23C8/80 ,  F16C33/30 ,  F16C33/62 ,  Y10T29/49707 ,  Y10T29/49709

摘要： In manufacturing a rolling bearing, at least one component of an inner ring, an outer ring, and a rolling element is manufactured from an alloy steel comprising 0.05 weight %-0.5 weight % carbon, 0.5 weight %-18 weight % chromium, 1.5 weight % or less silicon, 5 weight % or less molybdenum, 4.0 weight % or less vanadium, 4 weight % or less nickel, and 8 weight % or less tungsten, by subjecting the alloy steel to carburizing, hardening and tempering. The carburizing is carried out by vacuum carburization. In the vacuum carburization, carburizing and diffusion are carried out by introducing an acetylene-based carburizing gas in a hot atmosphere under reduced pressure, followed by hardening and tempering. The use of the vacuum carburization enables carburization with the chromium (Cr) content being 3.0 weight % or more, and even up to 18 weight %, which was difficult to achieve with the conventional gas carburization (pre-oxidation+gas carburizing).

摘要翻译： PCT No.PCT / JP98 / 03782 Sec。 一九九九年二月二十五日 102（e）1999年2月25日PCT PCT 1998年8月26日PCT公布。 公开号WO99 /​​ 10557 日期1999年3月4日在制造滚动轴承时，由含有0.05重量％-0.5重量％碳，0.5重量％-18重量％的合金钢制成内圈，外圈和滚动元件的至少一个部件 铬，1.5重量％以下的硅，5重量％以下的钼，4.0重量％以下的钒，4重量％以下的镍和8重量％以下的钨，通过对合金钢进行渗碳，淬火和回火 。 渗碳是通过真空渗碳进行的。 在真空渗碳中，通过在减压下在热气氛中引入乙炔系渗碳气体进行渗碳扩散，然后硬化和回火。 使用真空渗碳可以使铬（Cr）含量为3.0重量％以上，甚至高达18重量％的渗碳，这是常规的气体渗碳（预氧化+气体渗碳）难以实现的。

公开(公告)号：US06325867B1

公开(公告)日：2001-12-04

申请号：US08251575

申请日：1994-05-31

申请人： Shigeru Okita ,  Yasuo Utsumi ,  Akihiro Kiuchi

发明人： Shigeru Okita ,  Yasuo Utsumi ,  Akihiro Kiuchi

IPC分类号： C23C834

CPC分类号： F16C33/30 ,  C21D1/18 ,  C21D1/78 ,  C21D9/40 ,  C23C8/32 ,  F16C33/64 ,  Y10S148/906 ,  Y10T428/12458

摘要： A rolling bearing contains no more than 0.3 wt % of nitrogen in a grinding allowance portion after carbonitriding and hardening heat treatments, contains from 0.9 wt % (inclusive) up to 1.6 wt % (inclusive) of carbon and from 0.05 wt % (inclusive) up to 0.3 wt % (inclusive) of nitrogen in the surface layer of the finished part and has a nitrogen gradient of no more than 0.5 wt %/mm in the surface layer of the finished part. The rolling bearings are improved in grinding efficiency and which have their rolling life extended significantly.

摘要翻译： 在碳氮共渗和硬化热处理之后，滚动轴承在研磨余量部分中含有不超过0.3重量％的氮，含有0.9重量％（含）至1.6重量％（含）的碳和0.05重量％（含） 在最终部件的表层中最多含有0.3重量％（含氮）氮，并且在成品部件的表面层中具有不超过0.5重量％/ mm 3的氮梯度。 滚动轴承的研磨效率提高，滚动寿命显着延长。

公开(公告)号：US6071358A

公开(公告)日：2000-06-06

申请号：US933966

申请日：1997-09-19

申请人： Shigeru Okita ,  Susumu Tanaka ,  Manabu Ohori ,  Koji Ueda ,  Akihiro Kiuchi

发明人： Shigeru Okita ,  Susumu Tanaka ,  Manabu Ohori ,  Koji Ueda ,  Akihiro Kiuchi

IPC分类号： C21D9/36 ,  C21D9/40 ,  C22C38/00 ,  C22C38/04 ,  C22C38/18 ,  F16C33/30 ,  F16C33/32 ,  F16C33/62

CPC分类号： F16C33/30 ,  C22C38/04 ,  C22C38/18 ,  F16C33/32 ,  F16C33/62 ,  F16C41/008 ,  C21D9/36 ,  C21D9/40 ,  Y10S148/906

摘要： At least one of the components of a rolling member used in a manner in which it is rolled or slid with a mated member is made of carbon steel containing 0.8%-0.9% by weight of C, 0.1%-0.7% by weight of Si, 0.5%-1.1% by weight of Mn, and 0.1%-0.6% by weight of Cr and Fe substantially in the remaining part, wherein an ideal critical diameter DI value calculated from the compositions is 1.5-4.0, and the retained austenite amount after hardened heat treatment is 8%-22% by volume. The value DI is determined by the following equation:DI=(0.311.times.C %.sup.0.498).times.(0.7.times.Si %+1).times.(3.33.times.Mn %+1).times.(2.16.times.Cr %+1)

摘要翻译： 以与配合部件一起滚动或滑动的方式使用的滚动部件的至少一个部件由碳钢制成，所述碳钢含有0.8重量％〜0.9重量％的C，0.1重量％〜0.7重量％的Si ，0.5％-1.1重量％的Mn和0.1％-0.6重量％的Cr和Fe，其中由组合物计算出的理想临界直径DI值为1.5-4.0，残留奥氏体量 硬化热处理后为8％-22％。 值DI由以下等式确定：DI =（0.311×C％0.498）×（0.7×Si％+ 1）×（3.33×Mn％+ 1）×（2.16×Cr％+ 1）

公开(公告)号：US06342109B1

公开(公告)日：2002-01-29

申请号：US09420836

申请日：1999-10-19

申请人： Hiromichi Takemura ,  Kazuo Sekino ,  Shigeru Okita ,  Yasuo Murakami

发明人： Hiromichi Takemura ,  Kazuo Sekino ,  Shigeru Okita ,  Yasuo Murakami

IPC分类号： C23C822

CPC分类号： F16C33/62 ,  F16C2240/54 ,  Y10S384/913

摘要： As a steel material for an inner race, an outer race and a rolling element constituting a rolling bearing, there is used one containing carbon (C) and chromium (Cr) in an amount of 0.65 wt % to 1.10 wt % and 2.0 wt % to 6.0 wt %, respectively. At least one of the inner race, the outer race and the rolling element is formed from the steel material. The inner race, outer race and the rolling element thus formed is then subjected to hardening, tempering and polishing. Further, a chromium oxide layer (Cr2O3) having a thickness of 5 nm to 300 nm is formed on a race track surface of at least one of the inner race, the outer race and the rolling element. If the rolling bearing is used in operation under the lubrication at a high traction coefficient with water mixed therein, finely particulate molybdenum carbide and/or vanadium carbide having a particle diameter of 50 nm to 300 nm is distributed in the matrix.

摘要翻译： 作为构成滚动轴承的内圈，外圈和滚动体的钢材，使用含有0.65重量％〜1.10重量％的碳（C）和铬（Cr），2.0重量％ 至6.0重量％。 内圈，外圈和滚动体中的至少一个由钢材形成。 然后将如此形成的内圈，外圈和滚动元件进行硬化，回火和抛光。 此外，在内圈，外圈和滚动体中的至少一个的座圈表面上形成有厚度为5nm〜300nm的氧化铬层（Cr 2 O 3）。 如果在与水混合的高牵引系数的润滑下使用滚动轴承，则在基体中分布有粒径为50nm〜300nm的微细的碳化钼和/或碳化钒。

公开(公告)号：US06409846B1

公开(公告)日：2002-06-25

申请号：US09527245

申请日：2000-03-17

申请人： Hiromichi Takemura ,  Susumu Tanaka ,  Shigeru Okita

发明人： Hiromichi Takemura ,  Susumu Tanaka ,  Shigeru Okita

IPC分类号： C22C3822

CPC分类号： F16C33/62 ,  F16C2204/70 ,  Y10S148/906 ,  Y10S384/912

摘要： In a rolling bearing having a fixed race, a rotary race and a plurality of rolling elements disposed between said fixed race and said rotary race, at least said fixed race is made of a steel having 0.35 to 0.55% by weight of C, 11.0 to 17.0% by weight of Cr, 0.05 to less than 0.2% by weight of N and the rest of Fe and unavoidable components. Further, the sum of the content of C and N is from 0.45 to 0.65% by weight or less, and exhibits a surface hardness HRC of 57 or more after heat treatment and the diameter of eutectic carbide produced on said bearing races is 10 &mgr;m or less.

摘要翻译： 在具有固定座圈，旋转座圈和设置在所述固定座圈和所述旋转座圈之间的多个滚动元件的滚动轴承中，至少所述固定座圈由具有0.35至0.55重量％的C，11.0至 17.0重量％的Cr，0.05〜小于0.2重量％的N，其余的Fe和不可避免的成分。 此外，C和N的含量之和为0.45〜0.65重量％以下，热处理后的表面硬度HRC为57以上，所述轴承座上产生的共晶碳化物的直径为10um， 减。

公开(公告)号：US06620262B1

公开(公告)日：2003-09-16

申请号：US09380227

申请日：1999-08-25

申请人： Shigeru Okita ,  Akihiro Kiuchi

发明人： Shigeru Okita ,  Akihiro Kiuchi

IPC分类号： C23C822

CPC分类号： B21K1/04 ,  B21H1/12 ,  B23P15/003 ,  C21D1/32 ,  C21D1/74 ,  C21D3/04 ,  C21D9/0018 ,  C21D9/40 ,  C23C8/22 ,  F16C19/06 ,  F16C33/62 ,  F16C33/64

摘要： The continuous annealing furnace has two or more treatment chambers sequentially connected with each other and respectively filled with a gas atmosphere differing in carburizing property, which includes a carburizing chamber wherein roller members to be treated are carburized at 750° C. to 820° C., a slow cooling chamber wherein the roller members are cooled at said temperature or less of the carburizing chamber, an intermediate chamber including atmosphere gas blocking doors that can open/close an exit of the carburizing chamber and an entrance of the slow cooling chamber independently, and transferring means, and each chambers is filled to satisfy a relationship of K1−K2≧2 where K1 represents a partial pressure ratio between CO and CO2 in an atmosphere within the carburizing chamber and K2 represents a partial pressure ratio between CO and CO2 in an atmosphere within the slow cooling chamber.

摘要翻译： 连续退火炉具有两个或更多个处理室，它们相互连接并分别填充有不同渗碳性能的气体气氛，其包括渗碳室，其中待处理的辊构件在750℃至820℃下渗碳。 ，缓慢冷却室，其中辊构件在渗碳室的所述温度或更低温度下被冷却，包括可以独立地打开/关闭渗碳室的出口和缓慢冷却室的入口的气氛阻塞门的中间室， 和转移装置，并且每个室被填充以满足K1-K2> = 2的关系，其中K1表示渗碳室内的气氛中CO和CO 2之间的分压比，K2表示CO和CO 2之间的分压比 缓慢冷却室内的气氛。

公开(公告)号：US06051082A

公开(公告)日：2000-04-18

申请号：US9688

申请日：1998-01-20

申请人： Shigeru Okita ,  Manabu Ohori ,  Satoshi Kadokawa ,  Akihiro Kiuchi ,  Akira Iida

发明人： Shigeru Okita ,  Manabu Ohori ,  Satoshi Kadokawa ,  Akihiro Kiuchi ,  Akira Iida

IPC分类号： C21D6/00 ,  C21D9/36 ,  C21D9/40 ,  C22C38/00 ,  C22C38/18 ,  F16C33/32 ,  F16C33/34 ,  C22C38/02

CPC分类号： C21D9/36 ,  C21D6/00 ,  F16C33/32 ,  F16C33/34 ,  C21D2211/003 ,  Y10S148/906

摘要： A rolling bearing includes a rolling element made of a steel containing 0.9 to 1.1 wt. % C, 0.1 to 0.5 wt. % Si, 0.2 to 0.8 wt. % Mn, 1.0 to 1.8 wt. % Cr, with the balance being Fe and inevitable impurities. In the rolling bearing at least the surface of the rolling element includes carbides having an area fraction of 5% to 15%; of these carbides, carbides having an averaged particle diameter of 0.5 .mu.m or more share 50% or more of the area fraction of all the carbides; and of the carbides, carbides having an averaged particle diameter of 1 .mu.m or more share 2% or less of the area fraction of all the carbides; and wherein the rolling element has at least a Vickers surface hardness HV of 750 to 900.

摘要翻译： 滚动轴承包括由含有0.9〜1.1重量％的钢制成的滚动元件。 ％C，0.1〜0.5wt。 ％Si，0.2〜0.8wt。 ％Mn，1.0〜1.8wt。 ％Cr，余量为Fe和不可避免的杂质。 在滚动轴承中，至少滚动体的表面包括面积分数为5％〜15％的碳化物; 的这些碳化物，平均粒径为0.5μm以上的碳化物占所有碳化物的面积分率的50％以上; 平均粒径为1μm以上的碳化物，碳化物占所有碳化物的面积分率的2％以下; 并且其中所述滚动元件具有750至900的至少维氏硬度HV。