The sliding wear behaviour of Fe/316L/430-Ti(C,N) composites prepared by SPS and subsequent heat treatment
+ Author Affiliations
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Received: 14 March 2020; Revised:
14 May 2020; Accepted:
26 May 2020; Available online:
27 May 2020
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Abstract
In this study, a family of novel steel-Ti(C,N) composites were fabricated by spark plasma sintering (SPS) method and subsequent heat treatment. The hardness, indentation fracture resistance, and wear behaviour of the steel-Ti(C,N) composites were compared with that of unreinforced samples and their potentials were assessed by traditional cermet/hardmetal systems. The results show that with the addition of 20wt% Ti(C,N), wear rates of the newly examined composites are reduced by about 2 to 4 times and comparable to that of cermets and hardmetals. The martensitic transformation of steel matrix and the formation of in-situ carbides induced by heat treatment meliorated the wear resistance. Although excessive in-situ carbide improves the hardness, the low IFR (Indentation Fracture Resistance) value results in brittle fracture, which in turn results in poor wear property. The operative wear mechanisms were studied. This study provides a practical and cost-effective way to prepare steel-Ti(C,N) composites as potential wear-resistant materials.
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