HVOF Gun HVOF stands for High-Velocity Oxy-Fuel . In this high-velocity oxy-fuel is supplied by the gun. HVOF Gun required a very high velocity for the coating process. This high velocity is used to propel the particles at supersonic speed before impact onto the substrate. In the spray process high combustion pressure and high velocity of gas and particle resulting in high coating quality. Two types of Hvof on basics fuel Liquid Fuel Gas-Fuel HVOF Gun Application High density. Typical coatings have less than 2% porosity and some coatings as low as 0.5% porosity. High bond strength. For example, typical carbide coatings sprayed with HVOF exhibit bond strengths in excess of 69 MPA (10,000 psi). Other coating materials sprayed with HVOF have significantly higher bond strengths than the same materials applied using other atmospheric thermal spray processes such as air plasma spray. Optimum Hardness. A 12% tungsten carbide / cobalt coating will hav...
Twin Wire Arc Spray Gun Twin Wire Arc Spray Gun is a gun in which two wires anode and cathode respectively fed into the gun. When two wires touched it creates a spark and causes heating of those wires. Through which molten metal is poured onto the subject. The Twin Wire Arc process is a common commercial thermal spray process. It uses abrasive as a wire only other abrasive can't be used in Arc Spray Gun . Twin Wire Arc the coating is applied using a spray torch, which brings two electrically energized feedstock wires together. When the wires cross, an arc, similar to a welding arc, forms between the wire tips and causes them to melt. A gas stream injected behind the arcing wire tips atomizes the molten feedstock material and propels it downstream. When molten droplets of the feedstock material encounter the substrate the droplets flatten, solidify, and form a coating containing the characteristic lamellar structure associated with thermally sprayed materials....