Effect of Content of VC on Mechanical Properties of Ti(C,N) Based Cermets

Ti(C0.7N0.3)-(Ni-Co)-Cr2C3-VC system cermets with different content of VC were fabricated by hot pressure technology.The microstructure and fracture morphology were investigated by scanning electron microscope,and the mechanical properties such as flexural strength,Vicker’s hardness and fracture toughness were measured.The mechanical properties and SEM microphotography of fracture surface of the Ti(C,N) based cermet with different VC content were discussed.It is shown that the fracture modes of the four fabricated materials are mainly intergranular.It is also demonstrated that the flexure strength of the materials is decreased with the increase of VC content,the hardness and fracture toughness are increased with the increase of VC content.The integrated properties are the best when the content of VC is 16wt%.