Effect of heat load on structural changes of selected corrosive resistant steels

Corrosion resistant steels are used for the production of parts exposed to corrosive environment and also to thermo-mechanical loads. Steel molds in the glass manufacture industry with their functional surfaces simultaneously exposed to the combined thermo-mechanical cyclical loads by liquid glass and corrosive effects of aggressive exhausts of preheating burners are fine examples. This paper is focused on the structural properties and stability of the selected steels under these demanding conditions. The experiment simulated heat load conditions. Two experimental corrosion and heat load resistant materials with high hardness were selected: austenitic steel Dominial-ZF2 ESU, 1.2782 and Toolox 33 and 44 martensitic steels (equivalent to W. Nr. 1.2311, 1.2312, 1.2738, and P20)