What are the uses and characteristics of supersonic spraying?

       

Supersonic spraying has become the mainstream development direction of thermal spraying technology, and has penetrated into various fields abroad: petrochemical, machinery, printing and aerospace, metallurgy, electric power, plastics and other industrial sectors. Especially in the high-tech field, the high-quality coatings of HVOF meet the strict requirements for materials in aerospace, atomic energy and other fields. In addition, the wear of the stationary and rotating parts of the turbine caused by the wear of solid particles is a difficult problem in the hydropower industry. At present, HVOF technology has been used to solve the corrosion problem of components. Today, the supersonic spraying manufacturer will take you to understand what is the use of supersonic spraying? What are the characteristics

1. Huge energy, input power 320kw, high output power 270kw, equivalent to the total energy of 7 ordinary plasma guns, flame speed>2900m/s, temperature about 13000~15000℃, powder flying speed>700m/s, coating Excellent performance for spraying oxide ceramics and locally bonded alloys.



2. The coating has high bonding strength, and the principle is similar to that of jp-5000. The obtained ceramic coating is very reliable.



3. The coating is in a state of compressive stress, and its principle is similar to that of jp-5000.



4. Excellent comprehensive performance, the porosity is equivalent to 1/5~1/10 of ordinary plasma spraying, the microhardness of the same material can be increased by 50~100%, the measured cr2o3hv is 1680, and the ordinary plasma spraying is 950~1000. German Cr2O3 Plazjet coating technology has been successfully applied to four-color printing machinery and ball valve applications. Chromium oxide (Cr2O3) is a spray material.



It is a dark green powder that is chemically stable. Insoluble in acid, alkali, salt and various solvents. Extremely stable in high temperature corrosive etching gases (SO2, H2S). The hardness HRC>70, the friction coefficient is small. It is an excellent oxide ceramic anti-corrosion and wear-resistant coating material. Composite chromium oxide is based on chromium oxide, adding silicon dioxide and titanium dioxide. Compared with pure Cr2O3, the addition of silicon dioxide and titanium dioxide improves the spraying process performance, the coating is more dense, and the wear resistance is 1.5 times that of pure Cr2O3. Because its anti-adhesion performance is better than that of tungsten carbide, the friction coefficient is lower than that of tungsten carbide, and its corrosion resistance is much better than that of tungsten carbide. They are comparable in hardness, but sometimes even perform better than tungsten carbide-based materials.