Si粉含量对合成PCBN超硬刀具材料性能的影响  

Effect of Si content on properties of synthetic PCBN ultra-hard tool materials

作　　者：冯志祥[1] 江文清[2] FENG Zhixiang;JIANG Wenqing(Wuxi Vocational and Technical College,Mechanical Technology College,Wuxi 214121,China;Jiu Jiang Vocational and Technical College,Automotive Engineering College,Jiujiang 332000,China)

机构地区：[1]无锡职业技术学院机械技术学院,江苏无锡214121 [2]九江职业技术学院汽车工程学院,江西九江332007

出　　处：《粉末冶金工业》2022年第6期91-94,99,共5页Powder Metallurgy Industry

基　　金：江苏省自然科学基金资助项目(BK20201142)。

摘　　要：研究了不同Si粉含量对PCBN复合材料合成及性能的影响规律,以期得到高性能、高稳定性的PCBN复合材料。以cBN(粒径1~3μm,纯度99.9%),TiN(粒径1~2μm,纯度99.5%),Al(粒径1~2μm,纯度99.5%),Si粉粉(粒径1~3μm,纯度99.9%)为实验原料,将其高温真空处理后,利用六面顶压机合成了PCBN复合片。通过对PCBN复合片物相、硬度、磨耗比、抗冲击韧性以及微观形貌进行分析可知,当混合原料中Si粉的加入量在5%时,PCBN复合片的磨耗比、显微硬度值、抗弯强度和抗冲击次数都达到最大,分别为6800、37.7 GPa、785 MPa和90次。In order to obtain high-performance,high-stability PCBN composites,the influence of different Si content on the synthesis and properties of PCBN composites were studied.cBN(particle size 1-3μm,purity99.9%),TiN(particle size 1-2μm,purity 99.5%),Al(particle size 1-2μm,purity 99.5%),Si powder(particle size1-3μm,Purity 99.9%)are raw materials.After high-temperature vacuum treatment,the PCBN composites is synthesized on a six-side top press.Through the analysis of the phase,hardness,abrasion ratio,impact times and micro morphology of the PCBN composites,when the content of Si powder in the mixed raw material is 5%,the abrasion ratio,microhardness value,flexural strength and impact times of the PCBN composite sheet all reach the maximum,which are 6800,37.7 GPa,785 MPa and 90 times,respectively.

关 键 词：PCBN TIN 高温超高压 结合剂 抗弯强度 

分 类 号：TG711[金属学及工艺—刀具与模具]