Exploring the ductile-regime machining on cemented carbide: A perspective review

Strict requirements on the surface qualities of cemented carbide have been raised in the manufacturing of functional components and glass molding. However, the high hardness increases the difficulty in improving surface qualities. The application of ductile-regime machining theory to improve the surface quality of cemented carbide is unsatisfactory because of the severe tool wear, varying factors and microstructure defects induced by stress. To illustrate the complex mechanism in the removal of cemented carbide, firstly, the theory of ductile-regime machining for the cemented carbide are introduced. Secondly, methods for evaluating the mechanical properties of cemented carbide are discussed in terms of the microstructures. Thirdly, the conflicts between the traditional ductile-regime machining theory and microstructure defects are analyzed, leading to proposed limitations and solutions for applying ductile-regime machining to composite materials. In addition, the developments of ultra-hard tools and energy field-assisted machining techniques applied to the cemented carbide are summarized and discussed. Finally, the technical challenges and future solutions in this field are further pointed out.