Effect of Milling Ball Diameters on Mechanical Properties and Microstructure of Ti(C,N)-based Cermets

Effect of milling ball diameters on mechanical properties and microsturcture of Ti(C,N)based-cermets was studied.It is found that the grain size of the powders milled by balls with different diameters is big,the hard phase is big too and not uniform,the hardness and bending strength are also lower.If the balls used for a long time are graded by their weights,the grain size of the powder milled by various grade balls is small,the microstructure is fine,the hardness and bending strength are both high.