Application of thermal spraying technology in metallurgical industry

       Thermal spray technology started at the beginning of this century. At first, only the molten metal was formed into a liquid stream with compressed air, which was sprayed onto the surface of the coated substrate to form a film-like structure. The spraying temperature, the impact velocity of the droplet on the surface of the substrate and the properties of the material forming the coating constitute the core of spraying technology. The entire development of thermal spraying technology is basically advancing along these three main lines. Temperature and speed depend on different heat sources and equipment configurations. In a sense, the higher the temperature and the higher the speed, the more conducive to the formation of excellent coatings, which leads to the competition and coordination of the two elements of temperature and speed in the entire technological development process. The selectivity of a variety of spraying materials is another advantage of thermal spraying technology, which can make the working surface of different equipment "point iron into gold, wear helmets and armor". It is these three elements, along with a number of other controllable influences, that make thermal spraying a truly unique technology with additive effects, allowing the design of the wide variety of modified surfaces required, from general mechanical maintenance , until a wide range of applications in high-tech fields such as aerospace and bioengineering. Not long ago, at the 14th International Thermal Spraying Conference held in Kobe, Japan, the automotive, metallurgy and energy industries were taken as the three major themes for the deepening application and key development of thermal spraying technology, indicating that this technology is expanding its application. new trends