Easily oxidized material is hard faced by plasma transferred arc powder weld deposition

摘要

Plasma transferred arc powder weld deposition on easily oxidized materials is carried out using a weld filler material of a CuNi alloy with certain alloy additions. In the process for coating of easily oxidized materials by plasma transferred arc powder weld deposition using d.c. or d.c.-superimposed a.c. by the method described in DE 19626941.5, the weld filler material comprises a CuNi alloy with additions of (by wt.) (a) less than 10% Fe, less than 5% Cr, less than 4% B, less than 4% Si and about 1.5% C, the mixing ratio with the parent material being more than 40 vol.%, or (b) less than 10% Mo, Mn, Co, Ti, Ta, Zr and Mg and less than 2% P and N. Preferred Features: The resulting deposit comprises a metallic matrix containing (by wt.) 30-70% Al, 42-21% Cu, 18-9% Ni, 6-2% Fe, 4-0.5% Cr, 1.8-0.5% Si, less than 2% B and less than 10% others.