Features and principles of thermal spraying technology

       Features:

1. The base material is not limited, it can be metal and non-metal, and can be sprayed on various base materials;

2. Coating materials can be sprayed in a wide range, and thermal spraying technology can spray almost all solid engineering materials, such as cemented carbide, ceramics, metals, graphite, etc.

3. When spraying, the temperature rise of the substrate is small, and no stress or deformation occurs.

4. Flexible and convenient operation, not limited by the shape of the workpiece, convenient for construction;

5. The coating thickness is between 0.01 and several millimeters;

6. Coating properties are varied, and can form coatings with special functions such as wear resistance, corrosion resistance, heat insulation, oxidation resistance, insulation, conductivity, and radiation protection;

7. It has the advantages of strong adaptability and good economic benefits.

principle:

Thermal spraying refers to a series of processes in which finely dispersed metal or non-metal coating materials are deposited on the surface of the prepared substrate in a molten or semi-molten state to form a coating.

The coating material can be powder, ribbon, wire or rod.

Thermal spray guns provide the necessary heat from a gas, electric or plasma arc to heat the thermal spray material to a plastic or molten state, which is then accelerated by compressed air so that a confined beam of particles strikes the substrate surface.

Particles hitting the surface are deformed by punching to form a laminate that adheres to the prepared substrate surface, then cools and accumulates to form a layered coating.

Due to the different coating materials, the coating has the functions of high temperature corrosion resistance, wear resistance, heat insulation, electromagnetic wave and other functions.