| 摘要 |
<p>The present invention relates to a method of making a cemented carbide using submicron WC grain size (manufactured by carbothermal process) and containing WC and 6-24 wt.% Co using a cobalt powder having deagglomerated spherical grains of submicron average grain size and with a narrow grain size distribution wherein at least 80 % of the grains have sizes in the interval x+0.2x provided that the interval of variation (that is 0.4x) is not smaller than 0,1 νm. The invention is characterised in adding < 1 wt.% grain growth inhibitor such as VC and/or CR3C2 and selecting a carbon content close to etaphase formation.</p> |
