Metallographic analysis of the microstructure of a high – Mn plastic mold tool steel after heat treatment alternatives

Abstract

The present thesis is about studying the heat treatment alternatives on the Uddeholm Nimax tool as far as steel microstructure and the hardness after each heat treatment is concerned. The microstructure and the chemical composition of the steel will show the results of each heat treatment alternative (subzero heat treatment, carburizing) and if possible, examine possibilities to improve its mechanical properties. The specific tool steel grade has hardness limitations if treated to normal heat treatments. Hardness and its depth, going to be measured, the microstructure is going to observed with the chemical composition alterations in order to decide if it’s possible to increase hardness through the heat treatments alternatives. The equipment and the procedure that is going to be used is according on ASTM international standards.