Effects of Silicon and Chromium on High Temperature Oxidation Characteristics of Austenitic Spheroidal Graphite Cast Iron

Abstract

  In this study, the effects of various amounts of silicon (Si) and chromium (Cr) addition on high temperature oxidation characteristics and mechanical properties of austenitic spheroidal graphite cast iron containing 30mass% nickel (Ni) and 1.0mass% molybdenum (Mo) were investigated. As a result, metal oxidation at 1073K in mixed gas of oxygen and argon decreased with increasing amounts of Si and Cr addition. As for tensile properties at 1073K, tensile strength and proof stress increased with increasing amounts of Cr addition. In particular, high ductility was obtained with 4mass% Cr addition.