The powder passing through the torch flame is deposited semi-fused onto the heated part and melts immediately. Adhesion is ensured due to diffusion between the built-up alloy and base metal. Diffusion adhesion with the base is analogical in principle with soldering diffusion, where wettability and fluidity are the determinant factors. These factors depend upon availability of fluxing chemical elements, which prevent oxides formation and ensure qualitative adhesion of alloy with base metal, in powder composition. Melting temperatures depend on powder alloys and vary from 850°C to 1100°C. The distance from the nozzle to metal surface makes 6 to 20 mm.
Eutalloy® process offers a number of advantages as compared to electric arc or plasma arc welding:
The Eutalloy® process is developed for application of protective coatings on equipment parts and tools, which are subject to wear of different types.
Eutalloy® is a type of oxyacetylene torches for building-up of a broad range of powder alloys. It is possible to obtain coatings with thickness of 0.01 to several mm through application of Eutalloy® technology. Hardness of the building-up may vary from 15 to 65 HRC depending on the power grade (chemical composition). The coatings obtained are solid and completely homogeneous.