CASTING AND MECHANICAL PROPERTIES OF HEAT-RESISTANT STEELS

Abstract

Influence of chrome and aluminums on casting and mechanical properties of chromic heat-resistant steels for making poured details, working in aggressive environments to 1250 °С is studied. It is determined that under optimum relationship of basic components steels have satisfactory casting and mechanical characteristics, allowing to make foundings of different mass, geometry and overall sizes. It becomes obvious that better oxidation resistance at different temperatures can be reached by various contents of chromium and aluminum. Experimental findings have proved that adding aluminum to chromium steel improves the oxidation resistance of steels investigated. To get steels with more than 25% chromium with addition of 2–3% aluminum are aims for further investigation.

Keywords

• heat resistant steel casting properties
• mechanical properties
• heat resistance
• flowability
• linear shrinkage
• hardness
• heat resistance