Abstract
Cermets based cutting tools remain widely used in machining processes for their wear resistance. WC–Ni3Al cermets are potential replacements of WC–Co cermets in titanium machining due to their superior mechanical and chemical properties, especially at elevated temperature. In present study the reciprocating sliding wear behavior of WC–10Ni3Al was investigated using a ball-on-flat tester, with the Ti6Al4V sphere as the counter-face material. Meanwhile, the diffusion test between WC–10Ni3Al cermet and Ti6Al4V was conducted for further study of the reciprocating sliding wear mechanisms of WC–10Ni3Al. The WC–8Co was utilized as the reference material. The experimental results show that WC–10Ni3Al has a higher wear resistance than WC–8Co, for all the examined contact loads. Adhesive wear is the main wear mechanism for both WC–10Ni3Al and WC–8Co. The severer adhesion and element diffusion leads to the serious wear of WC–8Co surface, while WC–10Ni3Al can maintain the lower wear due to its low chemical affinity and element diffusion with Ti6Al4V, even under the high contact load.
Published Version
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