| 摘要 |
<p>A HIGHLY BUILDUP-RESISTANT HEARTH ROLL FOR CONVEYING A STEEL STRIP THROUGH A CONTINUOUS ANNEALING FURNACE AND A METHOD THEREFOR In a continuous annealing furnace, a steel strip is conveyed by conventional hearth rolls made of heat -resistant cast steel, such as HK 40. However, since the formation of buildup is frequent, conventional hearth rolls are inappropriate for long-term operation of a continuous annealing furnace. In the hearth roll of the present invention, which consists of a solid or hollow roll body and a surface layer, the surface layer containing more than 15% by weight of Nb and the balance being inorganic material, the formation of buldup is not frequest, thereby making long-term operation of a continuous annealing furnace possible.</p> |
