Introduction to Thermal Spray Technology

       Thermal spraying is to use electric energy or gas as heat energy to melt or semi-melt the coating material to be coated, and atomize it into fine droplets or high-temperature particles with gas, and spray it at high speed to cleaned or pretreated mechanical parts A new technology for forming a coating with certain characteristics on the surface. Thermal spraying technology is a new technology for material surface strengthening and protection. It occupies an important position in surface modification technology and has always been a new technology project promoted by China.



Thermal spraying uses different heat sources and forms, including plasma spraying, supersonic flame spraying, arc spraying, explosive spraying and laser spraying, etc. According to the shape of the spraying material, it can be divided into: powder spraying, wire spraying, ceramic rod spraying Wait.



Therefore, according to the different requirements of different workpieces for coating performance, different thermal spraying forms and different coating materials need to be selected to achieve the design requirements of various coatings. Due to the new technology of thermal spraying, a thin, dense and uniform layer can be formed on the surface of various mechanical parts, which has high wear resistance, corrosion resistance, insulation, radiation resistance, high temperature resistance, oxidation resistance, heat insulation, electrical conductivity and anti-bonding. and other special performance coatings, which can restore and extend the service life of mechanical equipment by multiples or dozens of times, and have the function of "reviving" scrapped parts and components, and can make the working surfaces of different equipment "pointed into gold and worn." "Helmets and armors" can save labor, materials, energy and improve work efficiency to obtain significant economic and social benefits. Therefore, thermal spraying technology has been widely used in aerospace, aviation, metallurgy, chemical industry, shipbuilding, machinery, coal, electric power, petroleum, textile and other industrial sectors