| 摘要 |
PURPOSE:To surely prevent oxidation without degrading corrosion resistance and strength by forming a compd. added with silicon nitride iron as plate refractories. CONSTITUTION:The compd. which consists essentially of 0.1 to 50wt.% silicon nitride iron and the balance a refractory material and carbon material is molded at the time of producing the plate refractories for a sliding nozzle. The silicon nitride iron acts as an antioxidant film near the service temp. of the plate refractories. This iron has small thermal expansion and large thermal conductivity and has, therefore, the effect of improving thermal impact resistance as well. As a result, the oxidation resistance is improved and the surface roughening, the penetration of the base metal, and the increase of the sliding resistance of sliding surfaces are prevented without degrading the corrosion resistance and strength. |
