Grinding process with cubic boron nitride (cBN) superabrasive wheels has been the subject of extensive research during high efficiency and precision machining difficult-to-cut materials in aerospace and aviation industries. However, the grinding performance and tool-life of conventional cBN abrasive wheels are severely affected by the probable macro-fracture and pull-out of cBN grains owing to their anisotropic crystalline structure. In this case, porous metal-bonded grinding wheels coupled with high-performance aggregated cBN abrasive grains were developed to improve tool performance and machined surface integrity. Characterisation of morphologies, including as-sintered aggregated cBN abrasive grains, pore structures and grain wear evolutions, was performed. The grinding ratio, grinding forces, force ratio and ground surface roughness were evaluated through single-grain grinding of Ti–6Al–4V alloys. Experimental results indicated that the porous aggregated cBN wheels had abundant chip storage space and excellent wear resistance. A stable grinding force ratio and small ground surface roughness were obtained during the tool wear tests due to the combined characteristics of microfracture and partial macrofracture of multi-layer cBN particles.

立方氮化硼 (cBN) 超级磨料轮的磨削工艺一直是航天和航空工业中高效率和精密加工难切削材料的广泛研究的主题。然而，由于其各向异性晶体结构，传统 cBN 砂轮的磨削性能和刀具寿命受到 cBN 晶粒可能的宏观断裂和拉拔的严重影响。在这种情况下，开发了多孔金属结合剂砂轮和高性能聚集 cBN 磨粒，以提高工具性能和加工表面完整性。进行了形态表征，包括烧结时聚集的 cBN 磨粒、孔隙结构和晶粒磨损演变。磨削比、磨削力、通过 Ti-6Al-4V 合金的单晶粒磨削评估力比和磨削表面粗糙度。实验结果表明，多孔聚合 cBN 砂轮具有丰富的切屑存储空间和优异的耐磨性。由于多层cBN颗粒的微观断裂和局部宏观断裂的综合特性，在刀具磨损试验中获得了稳定的磨削力比和较小的磨削表面粗糙度。