Removal Mechanisms of WC-Co Cemented Carbide in Ductile-Regime Machining
Due to the extremely high hardness and stability of cemented carbide,its ultra-precision machining is still vital and costly in the manufacturing of glass lens molds.The application of mainstream ductile-regime machining and other technologies on cemented carbide is not satisfying.In this study,nano-indentation,Vickers indentation,single-point diamond turning,variable depth cutting,and other experimental methods were used to explore the removal mechanisms of cemented carbide WC-Co.Firstly,the effectiveness of applying traditional ductile-regime machining theory on cemented carbide was discussed according to the results of turning and following observations.Then,the micro-defects that may appear on the surface during machining and the control methods were analyzed.Finally,the critical turning parameters to reduce WC grain breaking were explored,and a single-point diamond turning process was conducted to verify the effectiveness of critical cutting parameters in controlling micro-defects on the surface during machining.
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