| 摘要 |
<p>Improved work roll, particularly for use in closed gap rolling, has a composite structure comprising a cylindrical outer layer (14) made of steel, and providing the work surface of the roll, separated from a steel core (12) by an intermediate layer (13) of material having a low Young's modulus. Typically the Young's modulus of the intermediate layer (13) is in the range 1 GPa to 10 GPa and may, for example, be rubber or plastics material, or a hardenable material such as adhesive. The radial thickness of the intermediate layer (13) is quite low - less than 5 mm and preferably less than 1 mm. Provided that the dimensions of the outer layer (14) and intermediate layer (13) are chosen appropriately, this combination can realise a work roll having an effective Young's modulus which is lower than that of steel whilst at the same time retaining the advantages of a steel work surface and enabling higher rolling speeds.</p> |
