Patent ID: 9422984
Filing Date: 2016-08-23
CPC Classification: C21D,C23C,F03D,F16C,Y02E,Y02P,Y10T

Claim Text:
1. A bearing for a wind turbine, comprising: an inner ring and an outer ring concentrically arranged about an axis of rotation, the outer ring having an outer raceway at an inner side of the outer ring and the inner ring having an inner raceway at an outer side of the inner ring, the outer raceway and the inner raceway being adapted to bear a plurality of rollers rotatably arranged on the outer raceway and the inner raceway and between the inner ring and the outer ring, at least one layer arranged on one of the outer raceway and the inner raceway, wherein a main body of a corresponding one of the inner ring or the outer ring comprises a first metal composition having a first chromium content, wherein the layer comprises a thickness of at least 1 millimeter, and wherein the layer comprises a second metal composition having a second chromium content higher than the first chromium content.