PCBN刀具高速切削淬硬钢材料的研究

以PCBN复合片为刀具材料进行相关力学性能分析，并将其制成SNGN120408型刀具后在刀具机床上进行淬硬钢切削试验。分析结果表明:PCBN复合片的结合剂主要为TiN和TiB₂，其内部结构均匀，且有良好的致密性。切削试验表明:在干式切削淬硬钢的试验中，切削进给量以及切削速度对PCBN刀具的磨损有较为明显的影响。相比于切削速度，进给量对淬硬钢工件表面的粗糙度影响更大。PCBN刀具高速干式切削淬硬钢的磨损为黏结磨损、局部剥落和扩散磨损等多重磨损共同作用的结果。 

Research on PCBN cutting tool for high speed cutting hardened steel

PCBN composites was used as the tool material, its related mechanical properties were analyzed. Then, it was made into SNGN120408 type tool and the hardened steel cutting experiment was carried out on the tool machine. The analysis results show that the binders of the PCBN composites are mainly TiN and TiB₂. The internal structure is evenly distributed and has good compactness. Cutting experiments show that in the hard cutting process, the cutting speed and cutting feed rate have a more obvious impact on tool wear than the cutting depth. Compared with cutting speed, the feed rate has a greater influence on the surface roughness of hardened steel workpiece. The wear of PCBN tool high-speed cutting hardened steel is the result of multiple wear such as bond wear, local spalling and diffusion wear.