from the conferences organized by TANGER Ltd.
Paper deals with tool steel of QRO90 Supreme type that was treated by four different heat treatments. Firstly only laser quenched, afterwards laser quenched with followed-up plasma nitridation, the third material was only nitrided by plasma and the last one was nitrided by plasma and subsequently laser quenched. Microstructures with purity and micro-hardness in different depths under surface were investigated, so that to find the optimised heat treatment leading to the most favourable mechanical properties of the studied steel with taking tribological properties into consideration. Obtained results were compared mutually including results from material after conventional quenching. Laser quenched material with followed nitridation shapes up as the most optimised heat treatment variant
Keywords: QR090 Supreme tool steel, laser quenching, plasma nitriding, microhardness, microstructure© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.