If the problem is…

               Switch to a grade….

…chipping or fracturing of edges in wear or metalcutting applications, 

…of higher cobalt content and/or one with very fine WC grains (known as micrograin or submicron grades). Micrograin grades often possess superior combinations of tensile strength and hardness.

…thermal cracking,

…of higher cobalt or nickel content and/or coarser WC grains (i.e. a more thermal shock resistant grade), or one that contains additives such as TaC or NbC that improve the thermal properties of the metallic binder. 

…thermal deformation or 
adhesion wear (galling),

…of lower cobalt or nickel content (i.e. a harder, more deformation-resistant grade), or one that contains additives that increase the softening temperature of the binder such as TaC or NbC. 

…cratering,

…of lower binder content and/or coarser WC grains, or one that contains TaC or NbC.