Abstract
To improve the performances of new hot stamping processes for automotive industry, as well as to overcome their numerous drawbacks-such as oxidation, dies wear, severe thermal and mechanical cycles-new dies materials are being developed to obtain shorter heating and cooling cycles as well as improved strength and service-life.The paper investigates the tribological behavior of two new high thermal conductivity steel grades, by applying thermo-mechanical cyclic loads in the temperature range 600–800°C. The results show that a material microstructure characterized by agglomerates of Mo allows better performances than the case of finer elements of Mo homogeneously distributed in the metal matrix, with reduced friction and abrasion wear more relevant at the lowest testing temperatures.
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