Stellite cobalt‑based alloys are widely selected for components working under combined high‑temperature friction and corrosion. Apart from dilution rate control, preheating and inter‑pass temperature management play critical roles to prevent cracking during PAW plasma or laser hardfacing.
Shielding gas purity also matters for overlay performance. Impure gas may cause oxidation and pores. Seam tracking devices assist in keeping consistent torch offset, especially for curved 3D sealing surfaces of valves. Proper parameter matching delivers crack‑free, dense overlay layers for long‑term service.