Hypoeutectic spheroidal graphitic cast iron used for motor vehicle component comprises specified amounts of a mixture of carbon, silicon, rare earth metal, boron or boron nitride, iron and impurities

摘要

The hypoeutectic spheroidal graphitic cast iron includes a mixture of carbon of 1.5-3%, silicon of 1-5.5%, boron nitride of 0.005-0.015% or boron, and rare earth metal of 0.008-0.025% by weight. The balance is formed by iron and other impurities.