Investigation of the Tribological Behaviour of HS6-5-3 type Tool Steels during High-Temperature Sliding Wear*

Abstract

Abstract The wear behaviour of work roll materials is an important issue during the hot rolling process of metals. For this reason, the present study investigates the mechanical properties and the sliding wear behaviour of HS6-5-3 type high-speed steels (HSS) at elevated temperatures. Influences on the performance of HSS discussed are the microstructural constitution (as-cast and electro-slag remelted condition), the heat-treatment condition and the overall tribological system (C60 carbon steel and X5CrNi18-10 stainless steel counter-body materials). The results of the study show, how mechanical and tribological properties of HSS depend on these aspects and how a modification of the processing route can lead to improved high-temperature properties of HSS. As a main aspect the investigations show that, the formation of tribochemical wear layers during high-temperature sliding wear needs to be regarded. Tribochemical wear layers dominate the high-temperature wear behavior of steels. Therefore, the formation, characteristics and stability of tribochemical wear layers are analysed [1].