Kennametal Stellite, Goshen, Ind., offers UltraFlex hardfacing technology for parts with complex geometries, inner diameters, and other non-line-of-sight features. The UltraFlex treatment deposits a high-quality superalloy or tungsten carbide composite onto substrates with complex geometries without the problems common with welding. The coating easily conforms to intricate shapes and reaches remote locations.
From the internal diameters (IDs) of long pipes to the vanes of closed pump impellers, UltraFlex can be applied to locations that other hardfacing technologies cannot reach. The surface treatment can be applied in a range of thicknesses. The base thickness is approximately 0.25 mm, while typical applications range from 0.51 to 0.76 mm. The “as applied” surface is extremely smooth – especially compared to weld overlay. Depending on the application, the coating can be used “as applied” or machined to the desired finish. For example, in some petrochemical applications, UltraFlex alloy formulations allow for “pigging” of conveyance lines because of the smooth, crack-free surface.
