Tungsten Carbide

It's neither. It's merely a compound consisting of the metal tungsten (symbol W) and the non-metal carbon (symbol C). Two compounds are known, WC (tungsten carbide) and W2C (tungsten semicarbide). They are, of course, characterized by very high melting points and hardness. Many metals form carbides, but their structures and properties varies widely. Some are not real carbides, but "acetylides" (e.g. CaC2). Others are "interstitial" compounds in which the small carbon atoms are "trapped" in the crystal structure of the metal (e.g. FeC). These are not true compounds.