Two-powder plasma-arc surfacing of nickel-base alloys containing oxide ceramics

摘要

Surface welds using the two-powder plasma-arc surfacing process were carried out in order to manufacture anti-corrosion and anti-wear surfacing reinforcedwith oxide ceramics. The matrix materials were the nickel-base alloys NiBSi and alloy C4 (corresponds to NiMo 16 Cr 16 Ti, material number 2.4610). The reinforcement was provided by sintering pellets which consisted of various compositions of Al_2O_3, ZrO_2 and NiBSi and had been manufactured by means of powder metallurgy. Steel plates in the quality Fe 510 C according to EN 10025 (corresponds to S355J0, material number 1.0553) were used as the parent metal. It was possible to manufacture single-layer protective coatings which contained oxide ceramics and had layer thicknesses of up to 3 mm. In correlation to conventional oxide-ceramic and metal/oxide-ceramic plasma-sprayed coats and to alloy C4 coatings applied using the plasma-arc hot-wire surfacing process, the surface welds exhibited comparably good resistance to wear and corrosion.