Changes in Structure and Corrosion Resistance of Cryogenically Treated WC-Co Cemented Carbides
Year: 2021
Type: conference-paper
Abstract: The aim of this study was to evaluate changes in the corrosion resistance and microstructure of deeply cryogenic treated (DCT) cemented carbides (CC). Changes in corrosion resistance were determined by potentiodynamic testing in artificial mine water. Microstructural changes were characterized using X-ray diffraction analysis. Four sorts of WC-Co cemented carbides with different WC grain sizes and volume fractions of cobalt binder were used for the experiment. Specimens were divided into two groups. The first group of specimens was deeply cryogenic treated (DCT) at -186°C in dry liquid nitrogen vapor. The second group of specimens was tempered at 450°C. The results of the experiments show that DCT increased the amount of ε-Co in all the types of CC compared to the tempered group of specimens. This microstructural change and a change in the micro-stresses in the surfaces of the specimens contributed to increasing the corrosion resistance of CC after DCT.
Institution: University of West Bohemia in Pilsen
Language: English
Subfield: Ceramics and Composites
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W3210409554