Emerging thermal spray technology - directional spray method

       

As a new thermal spraying technology, the electro-explosive rapid directional spraying method has unique advantages compared with the traditional thermal spraying technology, and has a very broad application prospect in the fields of surface anti-wear and anti-corrosion. The main research at home and abroad is to use the electric explosion method to prepare the new technology of ultra-fine powder; the research on the use of electric explosion technology for surface spraying has not seen other reports except Japan.

On the basis of a large number of experiments, the WC-Co coating and the Ti6Al4V coating were prepared by using a self-designed high-speed spraying device, and the properties of the coating and the utilization rate in the process of electric explosion were studied and analyzed. The WC-Co and Ti6Al4V coatings were prepared by the self-designed high-speed spraying device, and the microstructure and microhardness of the coatings were detected and analyzed; the grain size grades of the two coatings were measured in detail, and the The distribution characteristics of grains in the coating. The experimental results show that the microhardness of the coating is significantly improved compared with the original hardness, and the coating contains a large number of small-sized (below 100 nm) particles.