材料科学
微观结构
钻石
热压
金刚石工具
复合材料
冶金
金属键合
碳化钨
硬金属
粘结强度
抗弯强度
金属
图层(电子)
金刚石车削
胶粘剂
作者
Dongdong Song,Wei Long,Xiaopan Liu,Weida Hu,Dexin Xie,Junsha Wang
标识
DOI:10.1016/j.ijrmhm.2015.08.008
摘要
The self-sharpening vitrified-metal bond diamond wheels added with a 3 wt.% brittle Na2O-B2O3-SiO2-Al2O3-Li2O vitrified bond were fabricated by hot pressed sintering technique. Using the methods of scan-electroscope, energy spectrum analysis, X-diffraction analysis, XPS analysis, Rockwell hardness test and three-point bending test, the effects of hot pressing temperature on the microstructure, hardness and the transverse rupture strength (TRS) of vitrified-metal bond were investigated. Then the grinding performance of cylinder of the diamond wheels was also studied. The results showed that, when the hot pressing temperature was 850 °C, a thin FeAl2O4 transition layer formed, which enhanced the interfacial bending strength between metal and glass phase, and the TRS of vitrified-metal bond reached the maximum value 826.54 MPa. Comparing with metal bond diamond wheel's, the average value of the roundness and straightness of the 50 cylinders ground by the vitrified-metal diamond wheel reduced from 3.1 μm and 2.5 μm to 2.7 μm and 2.1 μm.
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