PCBN材料的组织结构与力学性能  

Microstructures and mechanical properties of PCBN materials

作　　者：张彬 郭宏毅 ZHANG Bin;GUO Hongyi(Henan Institute of Special Equipment Safety Inspection and Testing,Zhengzhou 450046,China;Kaifeng Quality and Technical Supervision Inspection and Testing Center,Kaifeng 475000,Henan,China)

机构地区：[1]河南省特种设备安全检测研究院,郑州450046 [2]开封市质量技术监督检验测试中心,河南开封475000

出　　处：《金刚石与磨料磨具工程》2022年第6期699-704,共6页Diamond & Abrasives Engineering

摘　　要：以CBN-TiN-Ti-Al_(2)O_(3)为初始原料,采用高温高压法在1 500℃不同保温时间下制备PCBN材料,探讨其在不同保温时间下的物相组成、显微结构、力学性能和切削性能。结果表明:保温时间对PCBN材料物相组成无明显影响,但有助于提高其结晶度,实现其烧结均匀化和致密化;在保温时间为9.00 min时,能获得综合性能最佳的PCBN材料,其相对密度为99.1%,抗弯强度为910.9 MPa,磨耗比为7 120,显微硬度为33.5 GPa;用此PCBN做成的刀具加工模具钢零件,最多可加工365个。The PCBN material was prepared by high temperature and high pressure method at 1 500℃ and different holding times with CBN-TiN-Ti-Al_(2)O_(3) as the initial raw material. The phase compositions, microstructures, mechanical properties and cutting performance of PCBN under different sintering holding times were discussed. The results show that the holding time has no obvious effect on the phase compositions of PCBN, but it is helpful to improve its crystallinity and to realize its sintering uniformity and densification. When the holding time is 9.00 min, the PCBN material with the best comprehensive performance can be obtained with the relative density of 99.1%, the bending strength of910.9 MPa, the wear ratio of 7 120 and the microhardness of 33.5 GPa. The tool made of this PCBN can process up to365 die steel parts.

关 键 词：聚晶立方氮化硼 高温高压 力学性能 切削 

分 类 号：TQ164[化学工程—高温制品工业] TG71[金属学及工艺—刀具与模具]