AUSTENITIC STAINLESS STEEL HAVING SUPERIOR RESISTANCE TO OXIDATION AT HIGH TEMPERATURE

摘要

PURPOSE:To improve the resistance of an austenitic stainless steel to oxidation at high temp. by combinedly incorporating proper amounts of the oxide of a rare earth element and Al or Si oxide into the steel. CONSTITUTION:An austenitic stainless steel having superior resistance to oxidation at high temp. is obtd. by combinedly incorporating 0.1-2.0wt% one or more kinds of oxides of rare earth elements and 0.1-4.0wt% Al oxide and/or Si oxide into an austenitic stainless steel. Y, Ce and La are suitable for use as the rare earth elements. The oxides are incorporated into the austenitic stainless steel by the mixing or mechanical alloying of alloy powder of the steel or metallic powders of the constituents of the steel with powders of the oxides or by the injection of the oxides into the steel melted with an inert gas such as N2 or Ar as a carrier gas.