Effect of(Cr0.87,V0.13)2(C,N)Content on Microstructure and Mechanical Properties of WC-10Co Cemented Carbides
Aiming at the problems that carbides encountered as metal cutting tools,a new kind of near-nano WC-Co cemented carbides with excellent room and elevated temperature performance are prepared by adding a new inhibitor(Cr0.87,V0.13)2(C,N),and the effects of(Cr0.87,V0.13)2(C,N)content on the microstructure,room-temperature mechani-cal properties and high-temperature hardness of WC-10Co cemented carbides are investigated.The results show that(Cr0.87,V0.13)2(C,N)has an excellent effect on refining the WC grains.With the increase of(Cr0.87,V0.13)2(C,N)con-tent,the WC grains are refined,the hardness is increased,the fracture toughness is decreased,and transverse rupture strength(TRS)is firstly increased and then decreased,when the addition of(Cr0.87,V0.13)2(C,N)is 0.6wt.%,the TRS is the best,which is3840.5MPa.The addition of the inhibitor(Cr0.87,V0.13)2(C,N)also has a positive effect on the high-temperature hardness.With the increase of(Cr0.87,V0.13)2(C,N)content,the high-temperature hardness is increased.When(Cr0.87,V0.13)2(C,N)content is constant,the increase in temperature leads to a decrease in high-temperature hardness.
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