ABSTRACT A Process of Improving Abrasive and Erosive Resistance of High Velocity Oxy Fuel (HVOF) Spray Coating And Coated Parts Thereof. This invention relates to a process of improving abrasive and erosion resistance of high velocity oxy fuel (HVOF) spray coating and coated parts thereof subjected to high abrasive and erosive conditions such as slit erosion comprising the steps of surface preparation of machine parts on grit blasting using 12-16 mesh alumina grit powders coating upto 500 microns thickness on the machine part inside an acoustic chamber on employing liquid fuel and oxygen gas supplied HVOF spray system carried out by HVOF sparay gun mounted on 6 axis ABB robot, the coated parts then were surface grinded upto 100 micron to 300 micron; followed by characterize test evaluation of substantial increase in hardness and decrease in wear rate of the grinded coating upto 200 micron surface grinding. The invention relates also to the improve erosive resistant coated products resulted from the process steps. Fig.-1
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