Rolling bearing having a bearing ring with a hardened surface zone
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16C-033/62
F16C-033/64
F16C-019/04
출원번호
US-0379600
(2013-03-04)
등록번호
US-9239080
(2016-01-19)
우선권정보
DE-10 2012 204 618 (2012-03-22)
국제출원번호
PCT/EP2013/054269
(2013-03-04)
국제공개번호
WO2013/139576
(2013-09-26)
발명자
/ 주소
Strian, Ernst
Gebauer, Peter
Schmidt, Heiko
Graf-Goller, Oliver
출원인 / 주소
Schaeffler Technologies AG & Co. KG
대리인 / 주소
Volpe and Koenig, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
10
초록▼
A rolling bearing (6), in particular for the mounting of the shaft of a turbocharger, which rolling bearing includes a bearing ring (1) and a number of rolling bodies (9). The bearing ring (1) is formed from a steel which comprises, as alloy constituents, 0.05 to 0.65 wt % carbon, 0.5 to 5.0 wt % ch
A rolling bearing (6), in particular for the mounting of the shaft of a turbocharger, which rolling bearing includes a bearing ring (1) and a number of rolling bodies (9). The bearing ring (1) is formed from a steel which comprises, as alloy constituents, 0.05 to 0.65 wt % carbon, 0.5 to 5.0 wt % chromium, up to 1.0 wt % molybdenum, up to 1.0 wt % vanadium, and up to 1.0 wt % aluminum. The surface of the bearing ring (1) has a hardened surface layer (2) which comprises nitrites and which comprises a diffusion layer (3) and a connecting layer (4) situated above said diffusion layer. The surface layer (2) has a thickness of up to 1 mm. The invention also relates to a method for producing a corresponding bearing ring (6).
대표청구항▼
1. Rolling bearing comprising a bearing ring and a number of rolling bodies, wherein the bearing ring is formed from a steel that comprises, as alloy components, 0.05 to 0.65 wt. % carbon, 0.5 to 5.0 wt. % chromium, more than 0% and up to 1.0 wt. % molybdenum, more than 0% and up to 1.0 wt. % vanadi
1. Rolling bearing comprising a bearing ring and a number of rolling bodies, wherein the bearing ring is formed from a steel that comprises, as alloy components, 0.05 to 0.65 wt. % carbon, 0.5 to 5.0 wt. % chromium, more than 0% and up to 1.0 wt. % molybdenum, more than 0% and up to 1.0 wt. % vanadium, and more than 0% and up to 1.0 wt. % aluminum, wherein a surface of the bearing ring has a hardened surface zone that comprises nitrides and has a diffusion layer and a connection layer above said diffusion layer, the surface zone has a thickness of up to 1 mm, and the bearing ring comprises a raceway area and the surface zone is free from the connection layer in the raceway area. 2. The rolling bearing according to claim 1, wherein the surface zone has a thickness of 100-300 μm. 3. The rolling bearing according to claim 1, wherein the surface zone has a Vickers hardness of greater than 700. 4. The rolling bearing according to claim 1, wherein the steel comprises 0.27 to 0.34 wt. % carbon, 2.3 to 2.7 wt. % chromium, 0.15 to 0.25 wt. % molybdenum, and 0.1 to 0.2 wt. % vanadium. 5. The rolling bearing according to claim 1, wherein the bearing is formed as a two-row angular contact ball bearing. 6. Method for producing a bearing ring for a rolling bearing comprising producing, the bearing ring from a steel that comprises, as alloy components, 0.05 to 0.65 wt. % carbon, 0.5 to 5.0 wt. % chromium, more than 0% and up to 1.0 wt. % molybdenum, more than 0% and up to 1.0 wt. % vanadium, and more than 0% and up to 1.0 wt. % aluminum, generating nitrides in a surface zone on a surface of the bearing ring by a thermochemical treatment, so that a diffusion layer and a connection layer above said diffusion layer are formed, the surface zone is generated with a thickness of up to 1 mm, and the connection layer of the bearing ring is removed in a raceway area. 7. The method according to claim 6, wherein the surface zone is generated with a thickness of 100-300 μm. 8. The method according to claim 6, wherein the nitrides are generated at a temperature between 400° C. and 700° C. over a time period of up to 50 hours. 9. The method according to claim 6, wherein the connection layer of the bearing ring is removed in the raceway area by metal-cutting.
Fisher Kenneth L. (Lockland OH) Carter Russell R. (Cincinnati OH) Johnson Michael G. (Fairfield OH) Schell Jerry D. (Cincinnati OH) Nahm Alexander H. (Madeira OH) Price Michael J. (Cincinnati OH), Rolling element bearing having wear resistant race land regions.
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