Thermal spraying is to point to a series of process, fine and dispersed metal or nonmetal coating material, in a molten or semi-molten state, deposit to a after the preparation of the substrate surface, forming a spray deposit. It USES a heat source (such as arc, plasma spraying and combustion flame, etc.) will be powder or filiform metal or nonmetal material heated to melt or half molten state, and then with the help of a flame itself or compressed air injection at a certain speed to the pretreatment of substrate surface, deposit formed by surface coating of a kind of technology with a variety of functions.

Characteristics of thermal spraying technology:

1. The matrix material is not restricted, can be metal and non-metal, can be sprayed on various matrix materials;

2. The coating materials can be sprayed widely, and thermal spraying technology can be used to spray almost all solid engineering materials, such as hard alloy, ceramic, metal, graphite, etc.

3. In the process of thermal spraying, the substrate material temperature rise is small, without stress and deformation;

4. Thermal spraying operation is flexible and easy to operate.

5. Thermal spray coating thickness can range from 0.01 to a few millimeters;

6. The thermal spraying coating has various properties, which can form a coating with various special functions such as abrasion resistance, corrosion resistance, heat insulation, oxidation resistance, insulation, conduction and radiation protection.

7. Thermal spraying adaptability and economic benefits are good.

Principle of thermal spraying, thermal spraying refers to a series of process, in the process, subtle and dispersed metal or nonmetal coating material, in a molten or semi-molten state, deposit to a after the preparation of the substrate surface, forming a spray deposit. The coating material can be powder, ribbon, filaments or stick. Thermal spray gun is provided by fuel gas, or electric arc plasma arc necessary quantity of heat, heat the thermal spraying material in plastic state or molten, again through the acceleration of compressed air, make a constrained particle beam impact to the substrate surface. The particles that impact on the surface are deformed by stamping, forming laminated sheets that adhere to the prepared substrate surface, cooling and piling up, eventually forming a layered coating. The coating can achieve high temperature corrosion resistance, wear resistance, heat insulation and electromagnetic wave.

Thermal spraying material: spraying powder occupies a very important position in the whole hot spray material. Thermal spraying alloy powder includes nickel base, iron base and cobalt alloy powder, and is applied to repair and protection of mechanical parts according to different coating hardness.

Thermal Spray Application

That under the action of high-speed airflow of atomized into fine droplet particles or high temperature, at high speed jet to the treated surface, form a solid layer, so that the workpiece surface with different hardness, wear resistance, corrosion resistance, heat resistance, oxidation resistance, heat insulation, insulation, conductive, seal, disinfection, microwave radiation, and other various special physical and chemical properties. It can repair the old and waste in the maintenance of the equipment, and make the scrapped parts come back to life; It can also be strengthened and pre-protected in new product manufacturing to make it "live longer."

Hide Comments | Add Comment