Characteristics of plasma spraying technology

       Plasma spraying technology is one of the thermal spraying technologies in surface engineering, and its main feature is that plasma flame flow is the spraying heat source. Because the plasma flame has the characteristics of high temperature, concentrated energy and controllable spraying atmosphere, it is a good heat source for various refractory materials, and the flying speed of powder materials in the flame is very high, so in order to obtain a good combination and compact structure The spray coating provides the conditions.

1. Process characteristics of plasma spraying:

  (1) The substrate is not heated, the parts are not deformed, and the heat treatment state is not changed.

  (2) Wide range of materials that can be sprayed and many types of coatings.

  (3) The process is stable and the coating quality is high.

2. Application of plasma spraying technology:

  With the development of aero engines in the direction of high performance, long overhaul life, high reliability, low fuel consumption and low cost, thermal spraying technology has also developed rapidly. More than 3,000 surfaces of a new engine with thousands of parts and components need to be coated with thermal spray technology. It can be seen that thermal spray technology has been widely used in the aviation industry. Among them, since plasma spraying has many advantages such as low cost, high efficiency, simple operation, good coating quality, and suitable for large-scale mass production, it has accounted for more than 80% of all sprayed parts of aero engines.