Abstract
A high-speed steel roll has been developed for use in hot-rolling employing tool steel compositions, which exhibits good abrasion resistance and good resistance against roughened surfaces. To apply the high-speed steel roll in an existing hot strip mill, it was necessary to develop supportive technologies for preventing roll failure, for accommodating thermal expansion and for stabilizing the friction coefficient. We have improved the flow-detecting technology, and established a control technology to accommodate changes in shape and friction coefficient, and also quantified the aforementioned basic characteristics. The high-speed steel roll development has enabled not only the extension of the roll life, but also the improvement of productivity and quality, and the reduction of production cost.
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