Basic requirements for thermal spray powders

       

The composition, morphology and structure of the plasma spraying powder used in aero-engines were analyzed, and the domestically developed powders of the same type were compared with those produced abroad. has reached or is close to the foreign level

The composition, morphology and structure of the plasma spray powder used in aero-engines were analyzed, and the domestically developed powders of the same type were compared with those produced abroad. In terms of aspects, it has reached or approached the foreign level, but the microstructure, density and composition phase distribution of the thermal spraying powder coating are far behind those of similar foreign coatings. Therefore, a comprehensive evaluation of the powder and coating performance is carried out in combination with the spraying process. It is an important part of the localization of aviation coatings.



Spray powder occupies a very important position in the entire thermal spray material. Thermal spray alloy powders include nickel-based, iron-based and cobalt-based alloy powders, which are used in the repair and protection of mechanical parts according to different coating hardness.



1. The base material is not limited, it can be metal and non-metal, and can be sprayed on various base materials;



2. The coating materials that can be sprayed are extremely wide, and thermal spraying technology can be used to spray almost all solid engineering materials, such as cemented carbide, ceramics, metals, graphite, etc.;



3. The temperature rise of the base material is small during the spraying process, and no stress and deformation are generated.