Development prospect of surface treatment technology and thermal spraying technology

       Metal surface treatment technology In recent years, metal surface treatment technology has developed rapidly and has been widely used in many fields. In surface treatment technology and engineering, pretreatment occupies an extremely important position.



Surface treatment engineering integrates basic theories, technologies and latest achievements in many fields. Surface engineering technology creates a coating or film on the surface of the base material, or imparts many special properties to the material through surface modification, so that the surface performance of the material is much better than that of the material matrix, which can not only greatly extend the application field of the base material, but also It solves the problem that materials cannot meet environmental requirements in many fields. Surface engineering technology plays an irreplaceable and important role in solving common problems such as resources, energy, and environment encountered in human development.



Surface treatment technology and thermal spraying technology save energy and materials, thus protecting the precious resources that human beings depend on for survival, and also playing a very key role in environmental protection. In the 21st century, surface engineering technology will penetrate all walks of life, promote social civilization and improve the quality of life.



Thermal spraying technology is an important branch in surface engineering. It heats a certain wire and powder material to a molten or semi-melted state through a heat source such as flame, arc or plasma, and accelerates the formed droplet at a high speed. Spray onto the substrate to form a coating. The coating has excellent properties such as wear resistance, corrosion resistance, high temperature and heat insulation, and can repair the size reduction of parts caused by wear, corrosion or machining tolerances. The application of thermal spray technology mainly includes four aspects: long-term anti-corrosion, mechanical repair and advanced manufacturing technology, mold making and repair, and manufacturing of special functional coatings. At present, thermal spraying technology has been widely used in almost all industrial fields and household products (such as non-stick pans, infrared health care electric heaters, etc.).



At the end of the 20th century, the development of surface treatment technology and thermal spraying technology was very rapid, and it was quickly promoted and used. By the end of the 20th century, plasma spraying was still dominant. It is worth noting that the rapid development of high-speed flame spraying (HVOF) will occupy 25% of the market, ranking second. Arc spraying technology, due to its good economy and superior coating performance than flame spraying, will partially replace flame spraying technology and rise to the third place.