Dry sliding wear behaviour of TiC/Fe composites fabricated by exothermic dispersion of Fe–Ti–C powders

Abstract

The dry sliding wear behaviour of TiC/Fe composites was investigated. The wear surfaces of the composites were characterised by scanning electron microscopy equipped with an energy dispersive X-ray spectroscope. It was found that the mass losses of the composites increased with the increase in the applied load, but decreased slightly with the increase in the sliding velocity. The friction coefficient of the composites increased with the rising of the applied load. However, its fluctuation over the sliding distance decreased gradually with increasing load. In comparison, when the sliding velocity increased, both the friction coefficient and its fluctuation decreased. With the increase in the TiC reinforcements, the adhesive wear of the composites decreased, but the abrasive wear increased.

Effect of Chromium and Molybdenum Addition on the Microstructure of In Situ TiC-Reinforced Composite Surface Layers Fabricated on Ductile Cast Iron by Laser Alloying

“…From the point of view of the wear properties, the microstructure of the synthesized TRLs should contain a martensitic matrix with homogeneously-dispersed TiC precipitates [ 24 , 26 ]. Moreover, published data on the wear performance of Fe-based MMCs reinforced with TiC phase suggest a significant increase in the wear resistance of TRLs with increasing the TiC fraction [ 24 , 26 , 27 , 28 , 29 ]. However, reported works have shown that during the in situ synthesis of TRLs on cast iron substrates via LA, it is difficult to maintain a homogeneous dispersion of the reinforcing phase upon increasing the Ti concentration in the melt [ 23 ].…”