From the analysis of the principle and process of thermal spraying technology, thermal spraying technology has the following characteristics.
⒈ Due to the wide temperature range of the heat source, the coating materials that can be sprayed include almost all solid-state engineering materials, such as metals, alloys, ceramics, cermets, plastics and composites composed of them. Surfaces with functions (such as abrasion resistance, corrosion resistance, high temperature resistance, oxidation resistance, insulation, thermal insulation, biocompatibility, infrared absorption, etc.).
⒉ The heating degree of the surface of the substrate during the spraying process is small and can be controlled, so it can be sprayed on various materials (such as metal, ceramics, glass, cloth, paper, plastic, etc.), and the structure and properties of the substrate are almost There is no influence, and the deformation of the workpiece is also small.
⒊The equipment is simple and flexible in operation. It can not only spray a large area of large components, but also spray the designated parts; it can be sprayed indoors in the factory or constructed on the outdoor site.
⒋The spraying operation has fewer procedures, shorter construction time, high efficiency and is more economical. With the improvement of thermal spraying application requirements and the expansion of the field, especially the progress of spraying technology itself, such as the increasingly high-energy and sophisticated spraying equipment, coating The variety of layer materials has gradually increased, and the performance has gradually improved. Thermal spraying technology has achieved rapid development in the past ten years. Not only has the application field been greatly expanded, but the technology has developed from the early preparation of general protective coatings to the preparation of various functional coatings Layer; from the repair of a single workpiece to the manufacture of a large number of products; from a single coating preparation to include product failure analysis, surface pretreatment, coating material and equipment development, selection, coating system design and coating post-processing It has become a very active subject in the field of material surface science, and has gradually formed independent material processing technologies such as casting, forging, welding and heat treatment in modern industry. It has become an industrial sector to save valuable materials and save Energy, improving product quality, extending product life, reducing costs, and improving work efficiency are important technological means, which are more and more widely used in various fields of the national economy.
