Traditionally, land-based oil is pumped out of the ground using a pumpjack. Deep pumps require multiple sections of sucker rods connected together by couplings. These couplings are exposed to high abrasive wear combined with slurry erosion and impact. Depending on the environment, corrosion may be a factor, as well.
Surfaces of these couplings are traditionally protected using spray and fuse weld deposits. However, high-speed laser cladding is rapidly gaining favor because of the speed, low substrate dilution and reduced finishing requirements. Whatever your preference, Metco Joining & Cladding has materials suitable for the protection of these couplings.
Metco 15E is a NiCrBSiFeC fully alloyed powders with a spheroidal morphology for freely flowing material feed during coating application. The gas atomization process ensures a homogeneously alloyed and consistent product. Designed for a two-step ‘spray and fuse’ weld overlay process, the material is first applied a weld overlay and then fused, generally by induction. The result is a fully dense microstructure that is free of oxides and porosity and are metallurgically bonded to the substrate.
Metco 11A has a composition that is similar to Metco 15E, but is a better alternative for application using high speed laser cladding (EHLA). The use of the EHLA process offers less dilution; therefore, lowering the influence on substrate properties. In addition, the EHLA process is faster and generally requires less material removal for finishing.