| 摘要 |
A method for integrally applying a rough surface to the grooves of paper pulp refiner plates which involves placing the pattern for the plate into a mold and then applying to the desired surfaces of the pattern a mixture including a selected kind of ceramic particles with silica sand, additives and a binder system. The mold is then packed with conventional molding sand. The pattern is removed from the mold and superheated refiner plate base metal is introduced into the mold resulting in penetration of the voids around the particles and adherence of the particles to the surfaces selected by the application of the mixture. Surfaces desired to be smooth may be treated after the pattern is removed from the mold and before pouring by treating the desired surfaces with coating to accomplish that purpose. Ceramic particles used include alumina, silica, zirconia, silicon carbide, tungsten carbide, vanadium carbide and niobium carbide. These have the angularity to create the required voids to fill with molten metal.
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