| 摘要 |
PURPOSE:To subject a steel sheet to cold rolling at high speed without any heat scratch and slippage, by executing a chrome or chrome alloy plating on the surface of one or all rolls after working the work roll surface of the stand having a specified draft in a limited roughness, in a tandem rolling mill. CONSTITUTION:In the cold tandem rolling of a steel sheet 1, the work roll executed with a chrome or chrome alloy plating on the roll surface of one or all parts of the work roll group 2... of the cold tandem rolling mill is used, after working the surface roughness in 0.3-2.0 muRa as the work roll 2 of the stand whose draft is >=10%. The reason why the stand of >=10% draft only is regulated is because of no heat scratch nor slippage being caused in the case of <=10% draft. Also the reason why the surface roughness is limited is because of no slippage being prevented in the case of <=0.3 muRa and in the case of exceeding 2.0 muRa, an adverse effect being exerted on the product surface and the roll wear being quickened. The plating may be limited to the stand which becomes a bottle-neck most. |
