This paper assessed influence of dilution on the microstructure, mechanical properties and microhardness of a cobalt-based alloy deposited by plasma transferred arc (PTA) on three steel substrates. Dilution was analyzed by energy dispersive spectroscopy (EDS). Microstructure was analyzed by the optical microscopy (OM) and scanning electron microscopy (SEM). Microhardness measured on the scross section of coatings. Analysis results show that, the dilution ratio, microstructure and microhardness of the coating influenced by the welding parameters and substrates. |
