The aim of this work is to investigate the durability of tool steels for hot stamping by comparing the wear resistance of three hot\nwork tool steels. Friction and wear behaviours of different tool steels sliding against a 22MnB5 uncoated steel at elevated\ntemperatures were investigated using a high-temperature version of the Optimol SRV reciprocating friction and wear tester at\ntemperatures of 40 and 200�°C. Our results show that friction decreased with increasing temperature, whereas wear of the tool steel\nincreased with temperature for the second and the third tested tool steels. The slightly better wear behaviour of steel specimen 1\ncomes from the hardness of the carbides in the martensitic microstructure, which are rich in vanadium.
Loading....