Walze zum Warmwalzen mit erhöhter Beständigkeit gegen Bruch und Verschleiss

摘要

According to the invention there is now provided a roll for hot rolling comprising 70-95 weight %, preferably 85-94 % WC in a binder phase consisting of only cobalt or alternatively a Co-Ni-Cr-alloy containing 20-35 wt-% Ni and up to 10 % Cr, possibly with small additions of molybdenum. The WC grains are rounded with an average grain size between 3-10 mu m, preferably 4-8 mu m. The maximum grain size should not exceed 2 times the average grain size and no more than 2 % of the grains be less than half of the average grain size.