| 摘要 |
<p>Bearing component (10) having an surface (10a, 10b, 12a, 12b) at least one part (18) of which has been surface hardened by induction heating. A cross section of the bearing component (10) through said surface (10a, 10b, 12a, 12b) exhibits a hardness Hsurface at said surface (10a, 10b, 12a, 12b) and a hardness ?core at the non-hardened core (10c) of the bearing component (10). The hardness profile of said cross section exhibits a first region (24) whose hardness is substantially equal to the hardness Hsurface at said surface (10a, 10b, 12a, 12b), a third region (26) whose hardness is substantially equal to the hardness Hcore at the non-hardened core (10c) of the bearing component (10), and a second region (25) between said first region (24) and third region (26) in which the hardness profile exhibits a smooth transition between the hardness of said first region (24) and the third region (26). The average hardness in the first region of the harness profile is Y1 and the average hardness in the third region of the harness profile is Y3 and the hardness profile in the second region (25) has a section defined as a line between the points (F) where 0 <k< 2, on the hardness profile. The hardness of said section of said second region (25) decreases on average by less than 50 HRC per mm.</p> |
