INFLUENCE OF REFRACTORY METAL CARBIDE ADDITION ON CORROSION PROPERTIES OF CEMENTED CARBIDES

Autor:	Gregor Mori, Sutha Sutthiruangwong
Rok vydání:	2005
Předmět:	Materials science Mechanical Engineering Metallurgy Sintering chemistry.chemical_element Intergranular corrosion Tungsten Industrial and Manufacturing Engineering Corrosion Carbide Grain growth chemistry.chemical_compound chemistry Mechanics of Materials Tungsten carbide Cemented carbide General Materials Science
Zdroj:	Materials and Manufacturing Processes. 20:47-56
ISSN:	1532-2475 1042-6914
DOI:	10.1081/amp-200041607
Popis:	Cr 3 C 2 is added as a grain growth inhibitor to produce submicron cemented carbide. In a corrosive environment, the cobalt binder suffers from corrosion while tungsten carbide (WC) itself remains intact. In this study, cemented carbide specimens have been sintered to attain different magnetic saturation and grain growth inhibitor additions. Corrosion behavior of cemented carbides has been investigated by means of electrochemical measurements. A platinum plate and saturated calomel electrode were the counter and reference electrodes. Pseudopassive current density was altered by the grain growth inhibitor and magnetic saturation during sintering. The effects of microstructure and the presence of grain growth inhibitors on corrosion resistance of cemented carbide have been described. Higher amounts of tungsten and/or chromium dissolved in the binder improve corrosion resistance of a cemented carbide.
Databáze:	OpenAIRE
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