Si3N4 基微纳米复合陶瓷刀具的高速切削性能与 - 中国有色金属学报.PDFVIP

25 9 2015 9 Volume 25 Number 9 The Chinese Journal of Nonferrous Metals Sep. 2015 1004-0609(2015)-09-2517-06 Si N 3 4 ( 250101) Si N TiC Si N SiC STS 3 4 3 4 STS FD-01 PUMA200MA 40CrNiMo (SEM)STS STS 1000MPa19.5GPa40CrNiMo STS 40CrNiMo TG 711 A Cutting performance and wear mechanism of Si N -based 3 4 micro/nano composite ceramics tool in high speed cutting LÜ Zhi-jie, YANG Guang-an, CHENG Kai-qiang (School of Mechanical and Electronic Engineering, Shandong Jianzhu University, Ji’nan 250101, China) Abstract: Si N /TiC/SiC (STS) micro/nano composite ceramic tools were fabricated by vacuum hot pressing sintering 3 4 technique using Si N and TiC submicron particles by adding Si N and SiC nanoparticles. The cutting performance of 3 4 3 4 STS and FD-01 tools in dry high speed machining 40CrNiMo component was studied. The wear morphologies of rake and flank wear were observed by scanning electron microscopy (SEM). The wear characteristic and mechanism were discussed. The results show that STS micro/nano composite tool material has excellent mechanical properties. The flexural strength and hardness are 1000 MPa and 19.5 GPa, respectively. The flank wear increases with the increase of cutting speed in high speed dry machining 40CrNiMo workpiece. STS tool obtains smaller tool flank wear, longer tool life, and is more suitable for high speed cutting un