Abstract
The influence of chemical composition on the ductile-brittle transition (DBT) temperature, microstructure and mechanical properties of cermets based on titanium carbide (chemical composition of cermets TiC x , (x= 0.55 ; 0.65 ; 0.75 and 1.0) - nickel-based superalloy (Russian Trade Mark GS6U containing (wt%) Ni-10W-10Co-9Cr-5.5Al-2.5Ti-2Mo-0.15C) was studied. It was shown that high strength in cermets can be achieved if the structure of the frames is retained and the DBT temperature of the refractory phase is controlled. By changing the microstructure and its homogeneity, the chemical composition of the frames, the porosity value and the binding material, it is possible to synthesize new cermets for certain temperature regions. The optimum operating temperature of such materials depends on the DBT temperature and the temperature of the transition to a superplastic state of refractory phases.
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