Optimization of Surface Properties and Performances for HVOF Sprayed WC-Co Coatings on Mild Steel

Abstract

This study presented the application of Taguchi designed experiments to optimize the tungsten carbide/cobalt (WC-Co) deposited quality properties of the high-velocity oxygen-fuel (HVOF) process. The eight control factors were designed in a L18 factorial orthogonal array experiment, and the effects of control parameters on the surface properties were critically evaluated in the experiments. The surface anti-wear properties by optimal design have been studied comparatively. By optimization from Taguchi S/N ratios and analysis of variance, the surface wear volume values are decreased by 37%. It was clear that anti-wear performance estimations of HVOF sprayed WC-Co coatings are greatly improved by way of the optimal experiment, and these findings achieved the desired values in the WC-CO coatings. The experimental results indicated that the proposal method offers an effective and efficient approach for developing a robust and highly quality HVOF sprayed WC-Co coating.

Machining studies on Monel K − 500 using TiAlN coated tungsten carbide inserts under Ag nanoparticles incorporated modified pongamia pinnata oil lubrication

“…This procedure was used to eliminate errors during coating thickness measurement. According to trials conducted in previous investigations [88][89][90], the thickness of the coating on inserts was fixed as 2.50 μm. A micro-coat meter (Fischer coating tester) was used for measuring the coating thickness.…”