Erosion of hardmetals: Dependence of WC grain size and distribution, and binder composition

► A novel liquid jet erosion rig was used for testing erosion behaviour of hardmetals. ► Jet velocity, impact angle, binder content, composition and grain size were studied. ► An average velocity exponent of 3.4 was registered. ► Grain size reduction (3.5-0.6 μm) more than halve the erosion rate. ► A mixed binder (CoNiCr) reduces the erosion rate considerably versus Co binder.