Developing a novel porous aggregated cBN wheel and evaluating its grinding performance during machining Ti–6Al–4V alloys

Abstract

Abstract A novel porous aggregated cBN (AcBN) wheel was prepared under high-temperature sintering processes to ensure the desired machining efficiency and quality of Ti–6Al–4V alloys. The designations of pore structures and AcBN grains within metallic grinding wheels operating at the high efficiency deep grinding processes were conducted. Variations of grinding forces and force ratio, grinding temperature, specific grinding energy along with grinding parameters, was carried out. In addition, characterization analyses of grain wear morphologies of wheel surface were then performed with vitrified monocrystalline cBN (McBN) wheels and porous AcBN wheels. Findings show that the employment of Ti-coated cBN particles contributes to the improvement of chemical bonding strength between grains and metallic matrix alloys inside AcBN grains. Compared with the severe grain wear of vitrified McBN wheels, porous AcBN wheels possess the excellent wear resistance ability and desired machining quality, owing to the abundant chip storage space and micro-fracture properties of cBN particles.