Research on Microstructure and Grinding Performance of Vacuum Brazed Diamond with ZrC Reinforced Cu-Sn-Ti Composite Alloys

doi:10.3901/JME.2021.18.182

Abstract

Abstract: The Cu-Sn-Ti-xZrC reinforced phase composite filler metals were utilized to braze diamond/45# steel for achieving its high-strength connection. Using a scanning electron microscope, energy spectrometer, X-ray diffractometer to analyze the macro-morphology and the microstructure of the interfacial layer after vacuum brazing. At the same time, the Vickers hardness tester and friction wear tester are used to characterize the mechanical properties of the diamond. It shows that the Cu-Sn-Ti filler alloys with 15wt.% ZrC particles spread uniformly, and diamond particles exposure highly. There are no obvious defects such as cracks; meanwhile, diamond surfaces generate major carbides and a few intermetallic compounds. In short, with the increase of ZrC reinforcing particles, the microhardness of the joints gradually increases, and the microhardness at the interface is higher than that of the matrix and the filler layer。The friction coefficient, grinding resistance and drop rate of the abrasive particles are lower than those of other components; the wearing loss reach the high values, which proves that the brazed diamond joints with 15wt.% ZrC reinforcing particles have the best comprehensive performance.

Key words: ZrC reinforced phase, brazing, diamond, carbides, microhardness, friction coefficient, wearing loss

CLC Number:

TG454

YIN Xiaohui, XU Fan, XU Dong, DING Jianxiang, CHEN Ji, DING Zichao, CUI Bing. Research on Microstructure and Grinding Performance of Vacuum Brazed Diamond with ZrC Reinforced Cu-Sn-Ti Composite Alloys[J]. Journal of Mechanical Engineering, 2021, 57(18): 182-189.

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