公开(公告)号：US10156259B2

公开(公告)日：2018-12-18

申请号：US14896265

申请日：2014-05-28

申请人： NTN CORPORATION ,  Chikara Ohki ,  Yukio Matsubara ,  Daisuke Sato ,  Noriaki Miwa

发明人： Chikara Ohki ,  Yukio Matsubara ,  Daisuke Sato ,  Noriaki Miwa

IPC分类号： F16C33/62 ,  C21D9/40 ,  C21D1/06 ,  C22C38/00 ,  C22C38/18 ,  F16C33/64 ,  C22C38/02 ,  C22C38/04 ,  C22C38/20 ,  C22C38/22 ,  C22C38/42 ,  C22C38/44 ,  C23C8/32 ,  F16C19/06 ,  F16C33/32

摘要： A bearing component composed of steel which contains carbon not less than 0.95 mass % and not more than 1.1 mass %, silicon less than 0.3 mass %, manganese less than 0.5 mass %, sulfur less than 0.008 mass %, and chromium not less than 1.4 mass % and less than 1.6 mass % and is composed of remainder iron and an impurity and having a carbonitrided layer formed at a surface portion including a contact surface which is a surface in contact with other components is provided. An average concentration of nitrogen in the surface portion is not lower than 0.3 mass % and not higher than 0.6 mass % and variation in nitrogen concentration in the surface portion is not higher than 0.1 mass %. An amount of retained austenite in the surface portion is not greater than 8 volume %.

公开(公告)号：US10107335B2

公开(公告)日：2018-10-23

申请号：US14895470

申请日：2014-05-28

申请人： NTN Corporation

发明人： Daisuke Sato ,  Chikara Ohki

IPC分类号： F16C33/62 ,  C21D9/40 ,  C23C8/32 ,  C21D1/06 ,  C22C38/00 ,  C22C38/18 ,  F16C33/64 ,  C23C8/80 ,  C21D1/25 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  F16C33/32 ,  F16C33/36 ,  F16C19/06 ,  F16C19/36

摘要： A bearing component composed of steel which contains carbon not less than 0.95 mass % and not more than 1.1 mass %, silicon less than 0.3 mass %, manganese less than 0.5 mass %, sulfur less than 0.008 mass %, and chromium not less than 1.4 mass % and less than 1.6 mass % and is composed of remainder iron and an impurity and having a carbonitrided layer formed at a surface portion including a contact surface is provided. An average concentration of nitrogen in the surface portion is not lower than 0.3 mass % and not higher than 0.6 mass % and variation in nitrogen concentration in the surface portion is not higher than 0.1 mass %. An area ratio of a precipitate in a region where no carbonitrided layer is formed is not higher than 7%.

公开(公告)号：US10094422B2

公开(公告)日：2018-10-09

申请号：US14895901

申请日：2014-05-28

申请人： NTN CORPORATION

发明人： Chikara Ohki ,  Yukio Matsubara ,  Daisuke Sato

IPC分类号： F16C33/62 ,  C21D9/40 ,  C23C8/32 ,  C22C38/00 ,  C22C38/18 ,  F16C33/32 ,  F16C33/34 ,  C22C38/02 ,  C22C38/04 ,  C22C38/20 ,  C22C38/22 ,  C22C38/42 ,  C22C38/44 ,  C21D9/38 ,  C21D1/76 ,  C21D1/06

摘要： A bearing component composed of steel which contains carbon not less than 0.95 mass % and not more than 1.1 mass %, silicon less than 0.3 mass %, manganese less than 0.5 mass %, sulfur less than 0.008 mass %, and chromium not less than 1.4 mass % and less than 1.6 mass % and is composed of remainder iron and an impurity and having a carbonitrided layer formed at a surface portion is provided. An average concentration of nitrogen in the surface portion is not lower than 0.3 mass % and not higher than 0.6 mass % and variation in nitrogen concentration is not higher than 0.1 mass %. An amount of retained austenite is not greater than 8 volume %. An area ratio of a precipitate in the inside where no carbonitrided layer is formed is not lower than 11%.

公开(公告)号：US20140348454A1

公开(公告)日：2014-11-27

申请号：US14363750

申请日：2012-12-07

申请人： NTN Corporation

发明人： Takashi Ueno ,  Chikara Ohki ,  Daisuke Sato ,  Kyouhei Kageyama ,  Shougo Shimizu

IPC分类号： C21D9/36 ,  C22C38/02 ,  C22C38/04 ,  F16C33/32 ,  F16C43/04 ,  F16C19/06 ,  F16C33/38 ,  F16C33/80 ,  C21D9/40 ,  C22C38/18 ,  F16C33/62

CPC分类号： C21D9/36 ,  C21D1/06 ,  C21D1/18 ,  C21D9/40 ,  C21D2211/001 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C23C8/32 ,  C23C8/80 ,  F16C19/06 ,  F16C19/30 ,  F16C33/32 ,  F16C33/3875 ,  F16C33/3887 ,  F16C33/427 ,  F16C33/585 ,  F16C33/62 ,  F16C33/64 ,  F16C33/7823 ,  F16C33/7843 ,  F16C33/7893 ,  F16C33/805 ,  F16C43/04 ,  F16C43/065 ,  F16C2202/04 ,  F16C2204/66 ,  F16C2208/36 ,  F16C2208/52 ,  F16C2208/60 ,  F16C2220/04 ,  F16C2223/16 ,  F16C2226/74 ,  F16C2240/06 ,  F16C2240/40 ,  F16C2240/94 ,  F16C2361/65

摘要： An outer ring, an inner ring, and a ball, each of which is a bearing part, are made of a quench-hardened steel containing not less than 0.90 mass % and not more than 1.05 mass % of carbon, not less than 0.15 mass % and not more than 0.35 mass % of silicon, not less than 0.01 mass % and not more than 0.50 mass % of manganese, and not less than 1.30 mass % and not more than 1.65 mass % of chromium with the rest consisting of an impurity. A contact surface thereof with another part has a nitrogen concentration of not less than 0.25 mass %. A remaining austenite amount in the contact surface is not less than 6 volume % and not more than 12 volume %.

摘要翻译： 每个都是轴承部分的外圈，内圈和球均由淬火硬化钢制成，其含有不小于0.90质量％且不大于1.05质量％的碳，不小于0.15质量％ ％以上0.35质量％以下的锰，不低于0.01质量％且不大于0.50质量％的锰，不少于1.30质量％且不超过1.65质量％的铬，其余由杂质构成 。 其另一部分的接触表面的氮浓度不低于0.25质量％。 接触表面中的剩余奥氏体量不小于6体积％且不大于12体积％。

公开(公告)号：US10087989B2

公开(公告)日：2018-10-02

申请号：US14895914

申请日：2014-05-28

申请人： NTN CORPORATION

发明人： Daisuke Sato ,  Chikara Ohki

IPC分类号： F16C33/62 ,  C21D9/40 ,  C23C8/32 ,  C22C38/00 ,  C22C38/44 ,  F16C33/64 ,  C22C38/02 ,  C22C38/04 ,  C22C38/20 ,  C22C38/22 ,  C22C38/42 ,  F16C33/32 ,  F16C33/36 ,  C21D1/06 ,  F16C19/06 ,  F16C19/36

摘要： A bearing component composed of steel which contains carbon not less than 0.95 mass % and not more than 1.1 mass %, silicon less than 0.3 mass %, manganese less than 0.5 mass %, sulfur less than 0.008 mass %, and chromium not less than 1.4 mass % and less than 1.6 mass % and is composed of remainder iron and an impurity and having a carbonitrided layer formed at a surface portion including a contact surface which is a surface in contact with other components is provided. An average concentration of nitrogen in the surface portion is not lower than 0.3 mass % and not higher than 0.6 mass % and variation in nitrogen concentration in the surface portion is not higher than 0.1 mass %.

公开(公告)号：US20140321789A1

公开(公告)日：2014-10-30

申请号：US14363560

申请日：2012-12-04

申请人： NTN CORPORATION

发明人： Daisuke Sato ,  Chikara Ohki ,  Takashi Ueno ,  Yasutaka Kusumi

IPC分类号： F16C33/64 ,  C23C8/80 ,  C23C8/32 ,  F16C33/36 ,  F16C33/62

CPC分类号： C23C8/32 ,  C21D9/40 ,  C21D2211/001 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C23C8/26 ,  C23C8/80 ,  F16C19/06 ,  F16C19/364 ,  F16C33/32 ,  F16C33/34 ,  F16C33/366 ,  F16C33/585 ,  F16C33/62 ,  F16C33/64 ,  F16C2204/66 ,  F16C2240/50 ,  F16C2240/54 ,  F16C2240/90 ,  F16C2361/61

摘要： An outer ring, an inner ring and a ball are each constituted of steel containing at least 0.60 mass % and not more than 1.50 mass % of carbon, at least 0.15 mass % and not more than 2.50 mass % of silicon, at least 0.30 mass % and not more than 1.50 mass % of manganese, and at least 0.20 mass % and not more than 2.00 mass % of chromium with the rest consisting of an impurity. A nitrogen concentration in surface layer portions is at least 0.3 mass %. An average quantity of residual austenite as a whole in each of the outer ring, the inner ring and the ball is not more than 20 volume %.

摘要翻译： 外圈，内圈和球都由含有至少0.60质量％且不多于1.50质量％的碳，至少0.15质量％至不多于2.50质量％的硅，至少0.30质量％ ％以上且1.50质量％以下，铬至少0.20质量％以上且2.00质量％以下，其余由杂质构成。 表层部的氮浓度为0.3质量％以上。 每个外圈，内圈和球体中的残余奥氏体的平均量整体不大于20体积％。