Flame spraying

working principle

This operation, as a new type of surface care and reinforcement technology, has developed rapidly in the past 20 years and represents a very flexible branch in the metal surface engineering industry. By using flames as the source of heat, metal and non-metal materials are heated to a molten state, which is then transformed into a jet stream by high-speed airflow and sprayed onto the substrate.

When tiny molten particles are sprayed onto the substrate, plastic deformation occurs, forming a layered deposition coating. This process is called flame spraying. In equipment maintenance, it is used to compensate for surface wear of parts and improve performance.

Characteristics of flame spraying

Generally speaking, both metal and non-metal substrates can be sprayed, and the shape and size of the substrate are usually not limited, but currently it is not possible to spray small holes. Coating materials are very extensive, including metals, alloys, ceramics, and composite materials, which can be used as coating materials to give surfaces various properties such as corrosion resistance and wear resistance. High temperature resistance, insulation, etc.

The porous structure of the coating has oil storage, smoothness, and wear properties. The macroscopic strength of the spray welded surface layer containing hard phases can reach 450HB, and the macroscopic hardness of the spray welded coating can reach 65HRC. Flame spraying has little effect on the collective. The heating temperature on the substrate surface is between 200 and 250 degrees Celsius, and the overall temperature is about 70 to 80 degrees Celsius. The shape of the substrate is very small, and the material structure remains unchanged.