Hard metal made from tungsten carbide with a binder based on cobalt or cobalt and nickel has a magnetic saturation depending on the cobalt amount of the hard metal

摘要

Hard metal made from tungsten carbide with 5-25 wt.% of a binder based on cobalt or cobalt and nickel has a magnetic saturation ( sigma or 4 pi sigma in units of micro-tesla times cubic meter per kilogram) depending on the cobalt amount (X) in wt.% of the hard metal in a region of sigma = 0.11X to sigma = 0.137X or 4 pi sigma = 0.44 pi X to 4 pi sigma = 0.548 pi X.