发明公开
EP0303205A2 Ceramic dull roll for rolling mill and method of producing the same 失效
在轧钢机和它们的制备方法的陶瓷辊消光的表面。

Ceramic dull roll for rolling mill and method of producing the same
摘要:
A sintered ceramic dull roll for rolling mill essentially consists of 80 to 50 vol% of a first ingredient such as SiC, Si₃N₄, sialon, Al₂O₃ and ZrO₂ and 20 to 50 vol% of second ingredient such as the carbides, nitrides and borides of transition elements of the groups IVa, Va and VIa of the periodic table, and has a density of not less than 96% of theoretical density, the first and second ingredients are so selected that the difference in the Young's modulus between the first and second ingredients is not more than 2 x 10⁶ bar, the amount of the second ingredient is further so selected that the electric resistivity of the sintered ceramic dull roll is not more than 1 x 10⁻² Ωcm and the surface of the roll has a uniform surface roughness of not less than 6 µm, whereby the sintered ceramic dull roll has a long life.
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