ScholarWorks@경상국립대학교

초록

This study investigates the microstructural and chemical compositions of tungsten carbide (WC) circular sawblades from two manufacturers used for aluminum cutting. The blades are analyzed using scanning electronmicroscopy and energy-dispersive X-ray spectroscopy. Company A's blades incorporate Co, Ni, and Fe asbinders, thus resulting in a uniform microstructure and enhanced mechanical properties. The presence of Niimproves the corrosion resistance significantly, whereas Fe contributes to additional strength and toughness. Conversely, Company B's blades rely solely on Co as a binder, thus resulting in increased aluminumcontamination, which may be correlated with the observed blade chipping. Brazing analysis suggests that A'sblades, with higher Cu and Zn contents, provide superior strength and high-temperature durability, whereasB's blades, with a higher Ag content, facilitate easier brazing. Plate analysis show that A's plates containabundant C and Mn, thus offering high strength and crack resistance, whereas B's plates contain more Cr andNi, thus providing enhanced corrosion resistance and ductility. These findings highlight the effect of materialcomposition on the performance and durability of carbide circular saw blades and provide valuable insightsfor optimizing blade selection and use in industrial applications.

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