公开(公告)号：US08118953B2

公开(公告)日：2012-02-21

申请号：US12694674

申请日：2010-01-27

申请人： Takashi Iwamoto ,  Kunikazu Tomita ,  Hideto Kimura ,  Takaaki Toyooka ,  Hisato Nishisaka ,  Masao Goto ,  Hisashi Harada

发明人： Takashi Iwamoto ,  Kunikazu Tomita ,  Hideto Kimura ,  Takaaki Toyooka ,  Hisato Nishisaka ,  Masao Goto ,  Hisashi Harada

IPC分类号： C21D8/00 ,  C21D9/36 ,  C21D9/40

CPC分类号： C22C38/60 ,  C21D1/26 ,  C21D1/28 ,  C21D1/32 ,  C21D6/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/34 ,  F16C33/30 ,  F16C33/32 ,  F16C33/34 ,  F16C33/62 ,  F16H55/32 ,  Y10S148/906

摘要： A steel part having a long rolling contact fatigue life and capable of further increasing the life of a bearing under severer using condition than usual conditions. The steel part includes steel having a composition containing 0.7% by mass to 1.1% by mass of C, 0.5% by mass to 2.0% by mass of Si, 0.4% by mass to 2.5% by mass of Mn, 1.6% by mass to 5.0% by mass of Cr, 0.1% by mass to less than 0.5% by mass of Mo, 0.010% by mass to 0.050% by mass of Al, less than 0.0015% by mass of Sb as an impurity, and the balance composed of Fe and inevitable impurities, the steel being hardened and tempered. In the steel structure of a portion from the surface to a depth of 5 mm, residual cementite has a grain diameter of 0.05 to 1.5 μm, prior austenite has a grain diameter of 30 μm or less, and the ratio by volume of the residual austenite is less than 25%.

摘要翻译： 具有滚动接触疲劳寿命长的钢部件，能够比常规条件更严格地使用轴承的使用寿命。 钢部件包括含有0.7质量％至1.1质量％的C，0.5质量％至2.0质量％的Si，0.4质量％至2.5质量％的Mn，1.6质量％至1.6质量％ 5.0质量％的Cr，0.1质量％〜小于0.5质量％的Mo，0.010质量％〜0.050质量％的Al，小于0.0015质量％的作为杂质的Sb，余量由 铁和不可避免的杂质，钢被硬化和回火。 在从表面到深度为5mm的部分的钢结构中，残留渗碳体的粒径为0.05〜1.5μm，奥氏体的粒径为30μm以下，残留奥氏体的体积比 小于25％。

公开(公告)号：US20070199632A1

公开(公告)日：2007-08-30

申请号：US11706687

申请日：2007-02-15

申请人： Takashi Iwamoto ,  Kunikazu Tomita ,  Hideto Kimura ,  Takaaki Toyooka ,  Hisato Nishisaka ,  Masao Goto ,  Hisashi Harada

发明人： Takashi Iwamoto ,  Kunikazu Tomita ,  Hideto Kimura ,  Takaaki Toyooka ,  Hisato Nishisaka ,  Masao Goto ,  Hisashi Harada

IPC分类号： C22C38/22

CPC分类号： C22C38/60 ,  C21D1/26 ,  C21D1/28 ,  C21D1/32 ,  C21D6/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/34 ,  F16C33/30 ,  F16C33/32 ,  F16C33/34 ,  F16C33/62 ,  F16H55/32 ,  Y10S148/906

摘要： A steel part having a long rolling contact fatigue life and capable of further increasing the life of a bearing under severer using condition than usual conditions. The steel part includes steel having a composition containing 0.7% by mass to 1.1% by mass of C, 0.5% by mass to 2.0% by mass of Si, 0.4% by mass to 2.5% by mass of Mn, 1.6% by mass to 5.0% by mass of Cr, 0.1% by mass to less than 0.5% by mass of Mo, 0.010% by mass to 0.050% by mass of Al, less than 0.0015% by mass of Sb as an impurity, and the balance composed of Fe and inevitable impurities, the steel being hardened and tempered. In the steel structure of a portion from the surface to a depth of 5 mm, residual cementite has a grain diameter of 0.05 to 1.5 μm, prior austenite has a grain diameter of 30 μm or less, and the ratio by volume of the residual austenite is less than 25%.

摘要翻译： 具有滚动接触疲劳寿命长的钢部件，能够比常规条件更严格地使用轴承的使用寿命。 钢部件包括含有0.7质量％至1.1质量％的C，0.5质量％至2.0质量％的Si，0.4质量％至2.5质量％的Mn，1.6质量％至1.6质量％ 5.0质量％的Cr，0.1质量％〜小于0.5质量％的Mo，0.010质量％〜0.050质量％的Al，小于0.0015质量％的作为杂质的Sb，余量由 铁和不可避免的杂质，钢被硬化和回火。 在从表面到深度为5mm的部分的钢结构中，残留渗碳体的粒径为0.05〜1.5μm，前奥氏体的粒径为30μm以下，残留奥氏体的体积比 小于25％。

公开(公告)号：US20100139819A1

公开(公告)日：2010-06-10

申请号：US12694674

申请日：2010-01-27

申请人： Takashi Iwamoto ,  Kunikazu Tomita ,  Hideto Kimura ,  Takaaki Toyooka ,  Hisato Nishisaka ,  Masao Goto ,  Hisashi Harada

发明人： Takashi Iwamoto ,  Kunikazu Tomita ,  Hideto Kimura ,  Takaaki Toyooka ,  Hisato Nishisaka ,  Masao Goto ,  Hisashi Harada

IPC分类号： C21D8/00 ,  C21D6/00

CPC分类号： C22C38/60 ,  C21D1/26 ,  C21D1/28 ,  C21D1/32 ,  C21D6/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/34 ,  F16C33/30 ,  F16C33/32 ,  F16C33/34 ,  F16C33/62 ,  F16H55/32 ,  Y10S148/906

摘要： A steel part having a long rolling contact fatigue life and capable of further increasing the life of a bearing under severer using condition than usual conditions. The steel part includes steel having a composition containing 0.7% by mass to 1.1% by mass of C, 0.5% by mass to 2.0% by mass of Si, 0.4% by mass to 2.5% by mass of Mn, 1.6% by mass to 5.0% by mass of Cr, 0.1% by mass to less than 0.5% by mass of Mo, 0.010% by mass to 0.050% by mass of Al, less than 0.0015% by mass of Sb as an impurity, and the balance composed of Fe and inevitable impurities, the steel being hardened and tempered. In the steel structure of a portion from the surface to a depth of 5 mm, residual cementite has a grain diameter of 0.05 to 1.5 μm, prior austenite has a grain diameter of 30 μm or less, and the ratio by volume of the residual austenite is less than 25%.

摘要翻译： 具有滚动接触疲劳寿命长的钢部件，能够比常规条件更严格地使用轴承的使用寿命。 钢部件包括含有0.7质量％至1.1质量％的C，0.5质量％至2.0质量％的Si，0.4质量％至2.5质量％的Mn，1.6质量％至1.6质量％ 5.0质量％的Cr，0.1质量％〜小于0.5质量％的Mo，0.010质量％〜0.050质量％的Al，小于0.0015质量％的作为杂质的Sb，余量由 铁和不可避免的杂质，钢被硬化和回火。 在从表面到深度为5mm的部分的钢结构中，残留渗碳体的粒径为0.05〜1.5μm，奥氏体的粒径为30μm以下，残留奥氏体的体积比 小于25％。

公开(公告)号：US20060081314A1

公开(公告)日：2006-04-20

申请号：US10547252

申请日：2004-04-14

申请人： Takashi Iwamoto ,  Akihiro Matsuzaki ,  Kazuhiko Ohno ,  Masao Goto ,  Hisashi Harada ,  Hisato Nishisaka

发明人： Takashi Iwamoto ,  Akihiro Matsuzaki ,  Kazuhiko Ohno ,  Masao Goto ,  Hisashi Harada ,  Hisato Nishisaka

IPC分类号： C21D6/00

CPC分类号： C22C38/22 ,  C21D1/18 ,  C21D6/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  F16C33/30 ,  F16C33/62 ,  Y10S148/906 ,  Y10S384/912

摘要： Provided are a steel having excellent rolling contact fatigue life and the manufacturing method thereof. The steel consists essentially of 0.7 to 1.1% C, 0.2 to 2.0% Si, 0.4 to 2.5% Mn, 1.6 to 4.0% Cr, 0.1% or more and less than 0.5% Mo, 0.010 to 0.050% Al, bymass, and balance of Fe and inevitable impurities, is treated by quenching and tempering, has residual cementite grain sizes ranging from 0.05 to 1.5 μm, and has prior-austenite grain sizes of 30 μm or smaller. When the steel is used to bearing steel, the bearing life extends even under service in more severe environments.

摘要翻译： 提供具有优异的滚动疲劳寿命的钢及其制造方法。 钢主要由0.7-1.1％C，0.2-2.0％Si，0.4-2.5％Mn，1.6-4.0％Cr，0.1％以上到小于0.5％的Mo，0.010到0.050％的Al， 的Fe和不可避免的杂质，通过淬火回火处理，残留的渗碳体粒度范围为0.05-1.5μm，并且具有30μm或更小的先前奥氏体晶粒度。 当钢用于轴承钢时，轴承寿命即使在更恶劣的环境下也能使用。

公开(公告)号：US07763124B2

公开(公告)日：2010-07-27

申请号：US10547252

申请日：2004-04-14

申请人： Takashi Iwamoto ,  Akihiro Matsuzaki ,  Kazuhiko Ohno ,  Masao Goto ,  Hisashi Harada ,  Hisato Nishisaka

发明人： Takashi Iwamoto ,  Akihiro Matsuzaki ,  Kazuhiko Ohno ,  Masao Goto ,  Hisashi Harada ,  Hisato Nishisaka

IPC分类号： C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/40 ,  C21D9/36

CPC分类号： C22C38/22 ,  C21D1/18 ,  C21D6/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  F16C33/30 ,  F16C33/62 ,  Y10S148/906 ,  Y10S384/912

摘要： Provided are a steel having excellent rolling contact fatigue life and the manufacturing method thereof. The steel consists essentially of 0.7 to 1.1% C, 0.2 to 2.0% Si, 0.4 to 2.5% Mn, 1.6 to 4.0% Cr, 0.1% or more and less than 0.5% Mo, 0.010 to 0.050% Al, bymass, and balance of Fe and inevitable impurities, is treated by quenching and tempering, has residual cementite grain sizes ranging from 0.05 to 1.5 μm, and has prior-austenite grain sizes of 30 μm or smaller. When the steel is used to bearing steel, the bearing life extends even under service in more severe environments.

摘要翻译： 提供具有优异的滚动疲劳寿命的钢及其制造方法。 钢主要由0.7-1.1％C，0.2-2.0％Si，0.4-2.5％Mn，1.6-4.0％Cr，0.1％以上到小于0.5％的Mo，0.010到0.050％的Al， 的Fe和不可避免的杂质，通过淬火回火处理，残留的渗碳体粒度范围为0.05〜1.5μm，并且具有30μm以下的先前奥氏体晶粒度。 当钢用于轴承钢时，轴承寿命即使在更恶劣的环境下也能使用。

公开(公告)号：US20070204940A1

公开(公告)日：2007-09-06

申请号：US11710950

申请日：2007-02-27

申请人： Hisashi Harada ,  Hisato Nishisaka

发明人： Hisashi Harada ,  Hisato Nishisaka

IPC分类号： C21D6/00

CPC分类号： F16H55/34 ,  C21D1/18 ,  C21D6/002 ,  C21D6/008 ,  C21D7/06 ,  C21D9/40 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/36 ,  F16H15/38

摘要： A rolling/sliding member used for a toroidal continuously variable transmission according to the present invention is made of steel containing at least C: not less than 0.8 wt % and not more than 1.5 wt %, Si: not less than 0.9 wt % and not more than 2.1 wt % and Cr: not less than 2 wt % and not more than 5 wt %, and by applying surface hardening through machining to a surface whose surface hardness is set to not less than 60 HRC and not more than 64 HRC through quenching/tempering, surface compression residual stress thereof is set to not less than 700 MPa and not more than 1100 MPa. Furthermore, the amount of reduction of surface hardness when heated at 300° C. is set to not more than 1 HRC.

摘要翻译： 根据本发明的用于环形无级变速器的滚动/滑动构件由至少C：不小于0.8wt％且不大于1.5wt％的钢制成，Si：不小于0.9wt％，而不是 大于2.1重量％，Cr：不小于2重量％且不大于5重量％，并且通过机械加工表面硬化至表面硬度设定为不低于60HRC且不大于64HRC的表面 淬火/回火，表面压缩残余应力设定为700MPa以上且1100MPa以下。 此外，在300℃下加热时的表面硬度的降低量设定为1HRC以下。