Research is lacking on the machinability of HCWCI, even though this material is widely used in industries such as in mining. With the development o...

Research is lacking on the machinability of HCWCI, even though this material is widely used in industries such as in mining. With the development of new materials for wear-resistant cutting tools in the machining of hardened materials such as pcBN, the machining of high hardness materials has been extensively studied in the last few decades. In this study, a hardened HCWCI alloy, with and without the addition of Nb, was cast and characterised. The characterisation was performed by X-ray diffractometry (XRD), scanning electron microscopy (SEM), HRC and by determining the CVF. This alloy was submitted to the turning process using pcBN tools by varying the cutting speed under dry conditions and when using cutting fluid. This study expands research on the machinability of high hardness materials with a high volume fraction of carbides with the goal of seeking alternatives in the machining of HCWCI in relation to the rectification process.