| 摘要 |
A device for supporting the rollers (1, 2) of a rolling mill rotating with respect to the casings (7, 8), by double or multiple lines of roller bearings (5, 6) is characterized in that some carbonitrided layers (A) having a carbon content of 0.80% or greater and a Rockwell hardness HRC of 58 or more are provided on the surfaces of the bearing collars and the roller bearings of each roller bearing and the carbonitrided layers are formed in order to contain a content of retained austenite of 25 - 30% by volume.
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