Abstract
The effects of additive Ru powders on the microstructure, mechanical properties, abrasion resistance and corrosion resistant of Ti(C,N)-based cermets manufactured by sinter-HIP treatment are investigated systematically by scanning electron microscope, transmission electron microscope, machining test and electrochemical method. The additive Ru elements in cermets can diffuse into the binder phase of cermets, which can refine Ti(C,N) grains, reinforce binder phase of cermets through solution strengthening mechanism, and improve the mechanical properties of cermet significantly. The Ti(C,N)-based cermets with 1.0 wt% Ruthenium addition can possess the excellent hardness of 92.6 HRA, fracture toughness of 9.11 MPa m1/2 and transverse rupture strength of 2806 MPa. Moreover, the existence of Ruthenium in binder phase can enhance abrasion resistance of cermets, reduce wear rate of cermets cutting tools, and increase the lifetime of tools obviously. In addition, the addition of 0.5 wt% Ruthenium in cermets may inhibit the dissolution process of binder phase in hydrochloric acid solution and improve the corrosion resistant of cermets.
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