Use of binder alloy powder containing specific range of molybdenum (in alloyed form), iron, cobalt, and nickel to produce sintered hard metals based on tungsten carbide

摘要

Use of binder alloy powder containing 0.1-10 wt.% of molybdenum in alloyed form to produce sintered hard metals based on tungsten carbide, is claimed, where the binder alloy powder: has a Fisher Sub Sieve Sizer value of 0.5-3 mu m, measured according to ASTM B33O, and comprises 0.1-65 wt.% of iron, 0.1-99.9 wt.% of cobalt, and 0.1-99.9 wt % of nickel. An independent claim is included for pre-alloyed powder comprising 0.1-65 wt.% of iron, 0.1-60 wt.% of cobalt, 10-80 wt.% of nickel and 0.1-20 wt.% of molybdenum in metallic form and balance amount of impurities, where the pre-alloyed powder has a Fisher Sub Sieve Sizer value of maximum of 3 mu m, measured according to ASTM B33O.