Deloro Alloys are nickel-based with additions of typically Cr, C, B, Fe and Si. They cover a very wide range of hardness, from soft, tough, build-up alloys that are easily machined to exceptionally hard, wear-resistant alloys. The high hardness comes from the very complex microstructure consisting of Ni-solid solution, Ni3B, Cr5B3, Cr2B, CrB hard phases and various Cr carbides. They can be selected for hardnesses of between 15 and 60 HRC and above depending on the application. Si and B make the alloys self fluxing and their low melting point makes powders ideal for spray/fuse or powder and rod/wire welding applications. They maintain their properties up to temperatures of about 315ºC (600ºF) and also offer good oxidation resistance.
Deloro 22 is a pre-alloyed, gas-atomized, nickel-based powder which is used primarily for the local repair and hardfacing of glass-forming molds. It can also be used as a tough build-up alloy for the edges of cast iron and steel components.
Deloro 22 is typically deposited as a machinable, non-magnetic spray-fuse (SF) or powder weld deposited overlay. It is similar to Deloro 25 but is slightly softer, and is easily finished by hand.
Like the other Deloro nickel-base alloys, its wear resistance is mainly due to the presence of hard boride and silicide phases, and it retains its properties up to about 315ºC (600ºF). Because of its relatively low melting point, it is easily fused to form a smooth, hard-wearing surface.
Available Product Forms
Deloro 22 is available as a powder and welding rods.