A new method to produce iron-noble metal surface alloys is described.
Quenched-and-tempered AISI 4135 steel was electroplated with Pd, Pt an
d Au and laser surface melting was carried out to produce the respecti
ve surface alloys. CW CO, laser power levels of 50, 100 and 200 W were
employed. Auger depth profiling showed that alloying was achieved wit
h Pt and Pd at all three power levels, but only at 200 W with Au.