Nodularizing catalyst for cast iron and method of making same

Abstract

Abstract An improved catalyst is disclosed for making spheroidal graphite cast iron, the catalyst being in the form of a solid impervious and brittle block but severed from a sheet stock having a predetermined grid pattern of perforations or notches along at least one surface of said sheet stock. The block is substantially devoid of segregation and oxide interiorally thereof; the thickness of said block is increased over that capable of being produced by the prior art in the as-cast condition and yet devoid of segregation. The method of making such block comprises casting the molten catalyst into shallow closed pans, the cover for said pans carrying a pattern of ribs or projections, the cover and pan cooperating to define a selected configuration for an as-cast sheet stock. The resulting cast product can be manually or automatically broken along any desired module, defined by said grid pattern, to suit a variety of in plant casting applications particularly utilizing in-the-mold nodularizing treatment. The latter method places a nodularizing catalyst in a recess or reaction chamber defined within the gating system of a mold, whether constructed of bonded sand or pre-cast refractory.

Inventors

• 👤 Adolf Hetke
• 👤 Prem P. Mohla
• 👤 Robert J. Warrick

Bibliographic Details