New vertical centrifugal casting process for rolling cylinders can benefit healthy without porosities between the outer layer in high speed steel and ductile iron of the core joint.

摘要

Procedure vertical centrifugal casting cylinder bimetallic lamination layer speed steel with high carbon content characterized in that the metal casting core is not until solidification of all the eutectics of the layer is not complete, strain one first secondary cast, at a very high temperature and a small amount, when the temperature of the first secondary equals its increased liquidus at 130 to 230C, and in which the temperatures of the other side two and three, cast nodular, is equal to the common liquidus increased its at 40C to 60C.