| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 88 === By using discrete alignment perforated sheet and uniform gelatine tape, the aim of this study is to apply a ternary alloy brazing to the fabrication of monolayer orthogonal array CBN grit and matrices with same protrusion improving grinding performance. The firing was carried out in a vacuum furnace in order to prevent oxidation of metallic constituents which would inhibit wetting and flow of the braze alloy. After the active metal brazing process, the performance assessment was conducted with the Cemeron Plint TE-77 wear tester and modified Jones & Shipman surface grinding machine. Microstructure and interfacial reaction layer was investigated by OM, SEM, EDS, XRD and EPMA, the characteristics of the brazed substrate in this study has monolayer -controlled grit pitch setting Rcontrolled grit protrusion ¯chemical bonding °grit saving. Due to excellent wetting and bonding of the grit and the interfacial layer, there is no grit pull-out during the reciprocating abrasive wear test and simulated grinding service.
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