Friction surfaced Stellite6 coatings

Solid state Stellite6 coatings were deposited on steel substrate by friction surfacing and compared with Stellite6 cast rod and coatings deposited by gas tungsten arc and plasma transferred arc welding processes. Friction surfaced coatings exhibited finer and uniformly distributed carbides and were characterized by the absence of solidification structure and compositional homogeneity compared to cast rod, gas tungsten arc and plasma transferred coatings. Friction surfaced coating showed relatively higher hardness. X-ray diffraction of samples showed only face centered cubic Co peaks while cold worked coating showed hexagonally close packed Co also.

► Stellite6 used as coating material for friction surfacing.
► Friction surfaced (FS) coatings compared with casting, GTA and PTA processes.
► Finer and uniformly distributed carbides in friction surfaced coatings.
► Absence of melting results compositional homogeneity in FS Stellite6 coatings.