Patent ID: 6250366
Filing Date: 2001-06-26
Classification: B22D

Abstract:
A method for the production of precision castings, said method comprising:centrifugal casting, with controlled solidification, of a melt under vacuum or shield gas into a preheated mold having a central gate and a plurality of mold cavities extending from the gate toward an outer circumference (D.sub.a) of the mold, the cavities being surrounded by a material or a material combination with a coefficient of thermal conductivity lower than that of copper, andbefore the melt is poured, heating the mold, starting from the gate, to a material-specific casting temperature of the gate at a rate sufficient to produce a temperature gradient of at least 100.degree. C. between an inside circumference (D.sub.i) of the mold and the outside circumference (D.sub.a) of said mold, with, temperatures falling from the inside circumference to the outside circumference of the mold.