Fatigue strength of HVOF sprayed Cr3C2-25NiCr and WC-10Ni on AISI 4340 steel

Experimental data showed higher axial fatigue resistance for HVOF coated specimens in comparison to electroplated chromium. The wear weight loss tests indicated better results for the HVOF thermal spray processing in comparison to the chromium electroplating. An increase in the corrosion resistance of steel protected with WC-10Ni HVOF coatings occurred with increased coating thickness. For Cr3C2-25NiCr HVOF coating, results indicate clearly the higher salt spray resistance.