Patent ID: 7824605
Filing Date: 2010-11-02
Classification: C21C,C22C,Y10T

Abstract:
1. An as-cast ductile iron composition comprising: from 2.5 to 4% by weight of carbon; from 0.1 to 1.5% by weight of copper; from 0.35 to 0.45% by weight of a carbide stabilizing agent; less than 2% by weight of silicon; from 0.02 to 0.06% by weight of magnesium; and a matrix structure obtained without an austempering treatment, wherein the matrix structure comprises pearlite and carbides, wherein the carbide % is 5-50% by volume of carbides and the balance is iron, and wherein the as-cast ductile iron has a hardness range of 444-555 HBW.