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.
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