How to choose the right thermal spray material

Release time: 2024-02-22

When we choose thermal spraying technology for spraying, it is necessary to choose a suitable coating material for our spraying, which not only ensures the performance of the coating but also the service life of the coating. In the selection of coating materials, we should first consider the working conditions of the workpiece and the performance of the coating, as well as the materials used, batch, economy and thermal spraying method. We can carry out according to the role of different thermal spraying technology coating, different coatings can be divided into corrosion-resistant coatings, wear-resistant coatings, friction-reducing sealing coatings, high-temperature thermal barrier coatings, insulating or electrically conductive coatings, size repair coatings and so on.

Carry out the coating coverage if there is damage to the workpiece and failure, we can rule out because of the damage caused by the coating problem, because the damage to the equipment can be completely excluded from the coating caused by the internal cause of damage caused by the equipment can be determined, so to meet the requirements of the working conditions and the coating performance does not necessarily exist between the simple relationship. Working conditions should be analysed in detail, according to reference materials or experimental data, comprehensive consideration of the coating structure, physical, chemical, mechanical and other properties, to determine one or several coating materials.

Wear-resistant coating by plasma spraying is one of the main application areas of surface coating technology. Although there is a rough relationship between the hardness of the coating and the wear resistance, the hardness does not fully represent the wear resistance of the surface coating. As different types of wear require different material properties, impact, corrosion, fatigue and temperature often accompany wear.

The selection of surface coating materials should not blindly pursue high-performance or high-priced coating materials, resulting in unnecessary waste. Material price can not be used as a criterion for selecting coating materials. Under the premise of meeting the requirements of the working conditions, try to use inexpensive coatings, which is particularly important in mass production. For example, if nickel-based alloy coating materials can be used, cobalt-based alloy coating materials are not required.

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