The Growth of Grey Cast Iron : Second Report

Abstract

The influence of ammonia, methane and water vapour mixed with nitrogen _or hydrogen upon the growth of grey cast iron was confirmed by the same method as adopted in the previous investigation. The graphitization of the pearlite-cementite in grey cast iron was also measured by dilatometer in various atmospheric conditions. Examining the results, it was confirmed that the abnormal expansion at Ar transformation of grey cast iron is due to the graphitization of the pearlite-cementite as presumed by Benedicks and Löfquist.