Mechanical And Tribological Properties Of Copper Infiltrated High Speed Steel Based Valve Seat Insert Materials With Different Hard Phase Particles

Authors:

Christopher Rynio (Bleistahl Services GmbH & Co. KG, Germany),
Anna Seyfarth (Bleistahl Services GmbH & Co. KG, Germany)

Abstract:

The pursuit for higher combustion pressures and temperatures in internal combustion engines demands the development of new materials that meet these requirements.High speed steel based composites reinforced with different hard phases were fabricated by uniaxial pressing and sintering. The corresponding microstructures were analyzed in the scanning electron microscope (SEM) and the mechanical properties (hardness) were compared. High temperature wear tests were performed with a with a RIG-test using real valve seat insert and valve geometries. The wear scars were analyzed using SEM with energy dispersive X-ray spectroscopy (EDX) and laser scanning profilometry. It was found that the cobalt containing hard phases in the benchmark material can be replaced by Fe-based hard phases in combination with molybdenum to reach a similar wear resistance in the corresponding tribosystem.

DOI:

https://doi.org/10.59499/WP225363056