On the Hardfacing by the Application of Infiltration (I)

Properties of Hardfaced Layers on WC Skeletons

Abstract

The application of infiltration to the hardfacing was examined by using the skeletons of WC compacts (particle size: 0.5-2μ) and the infiltrants of Ni-B-Si, Co-B-Si, Ni-P, Fe-C, Fe-C-Mo and Fe-C-W alloys having nearly eutectic composition.
In all cases, the infiltration proceeded successfully and the hardfaced layers which tightly adhered to base metal were obtained.
Among them, the system WC/Ni-3%B-4.5%Si was particularly excellent in the mechanical properties such as hardness, rupture strength and abrasion resistance.
Small addition of Cu or Cr into the system improved remarkably the corrosion resistance in 5% boiling H₂SO₄ or HCl aqueous solution.