New Development of Thermal Spray Technology

       Thermal spraying technology has been widely promoted and applied in China. The development trend and characteristics in recent years are:



(1) Large-area long-term protection technology has been widely used. For steel structures exposed to the outdoor atmosphere for a long time, spraying lead, zinc and their alloy coatings is used instead of the traditional painting method, and cathodic protection is implemented for long-term atmospheric corrosion protection. , has developed rapidly in recent years. Such as large-scale projects such as TV towers, bridges, highway facilities, water gates, microwave towers, high-voltage transmission towers, underground cable supports, beacon buoys, shafts and shafts, lead, zinc and their alloys are sprayed for corrosion protection. At present, there are dozens of professional spraying factories in China engaged in this work, and the spraying area reaches more than several million square meters every year. This technology is not only widely popularized and applied in China, but also has been well promoted and applied in foreign aid projects.



(2) The use of thermal spraying technology to repair and strengthen the localization of large-scale key equipment and imported parts. There have been many successful application examples in this regard in recent years. Such as: one-meter-seven rolling mills, high-speed fan rotors, large extruder plugs, large gears, electrode extrusion molding sprays, high-power automobile crankshafts, etc., the first is to solve the urgent production needs; the second is to save a lot of foreign exchange .



(3) The application of supersonic flame spraying technology With the development and improvement of thermal spraying technology in my country, the quality requirements of the sprayed layer are getting higher and higher. In recent years, the high-speed gas (HVOF) method developed in the United States and other countries is a new process method for preparing high-quality coatings. Because the supersonic flame spraying method has many advantages, nearly ten sets of equipment have been introduced from abroad in China, which play an important role in various indus