Effect of Electric Field Treatment on the Performance of YG8 Cemented Carbide and Its Cutting Tool
To explore an efficient strengthening treatment technology for cemented carbide,the effects of electric field treatment on the microstructure and performance of YG8 cemented carbide were studied.TEM and SEM were used to analyze the microstructure of YG8 cemented carbide samples and their cutting tools before and after electric field treatment,with their mechanical performance being tested by a Vickers hardness tester and cutting experiments being conducted using a CNC lathe.The results show that after the electric field treatment,the fracture toughness of the YG8 cemented carbide samples increases,the cutting performance of the tools is improved,and the surface quality of the workpiece processed with the electric field treated tools is also significantly improved.Under the action of pulse current,the material undergoes electroplastic effect which provides a driving force for dislocation movement,making dislocation more prone to proliferation and slip,increasing dislocation density,and beneficially improving the performance of the material.When the pulse current is 15 A/mm2,the fracture toughness reaches a maximum value of 9.41 MPa·m1/2,which is nearly 10％higher than the fracture toughness without electric field treatment.The YG8 cemented carbide tools treated with the electric field reduces the cutting temperature during the cutting process,effectively preventing the formation of chip deposits,improving the friction state during the cutting process,ensuring cutting quality,and significantly improving the surface quality of the pro-cessed workpiece.
cemented carbidecutting toolelectric field treatmentpulse currentdislocationcutting
万方数据
维普
