We divide the raw materials for thermal spraying into raw materials, medium spraying materials and auxiliary materials. Thermal spraying wire (bar) materials are divided into flame spraying wire (bar) materials and arc spraying wire (bar) materials.
Thermal spraying powder raw materials are divided into metal and alloy powder, self fusible alloy powder, wearable coating powder, ceramic powder, cermet powder and composite powder raw materials.
Brazing raw materials mainly include coating raw materials that need subsequent diffusion heat treatment after thermal spraying process.
The key auxiliary materials include raw materials for sand blasting, shielding and hole sealing.
Development trend of thermal spraying material Market
Key technologies include aerospace precision parts, automobiles, medical instruments and industrial gas turbines. The application of thermal spraying coating in biomedical and medical device industry will help to improve its wear resistance and biocompatibility, and also play a role in denture implantation.
The continuously expanding application scope also includes ships, locomotives, tanks, helicopters and motorcycle gas turbines, which also accelerate the prosperity of the thermal spraying coating market. Considering the characteristics of high temperature corrosion resistance, polymer and metal thermal spraying coatings are usually used in the form of powder on industrial gas turbine blades.
There are many thermal spraying ceramic materials. Theoretically, plasma spraying process can spray all solid engineering materials, but not all ceramic materials can be used as thermal spraying. Some ceramic materials can be used only after change or special treatment. Others can only be used as thermal spraying raw materials, thermal spraying ceramic coating raw materials. Metal thermal spraying can not consider the thermal spraying raw materials specified in the basic regulations, There are also some special circumstances.
(1) ceramic materials that are easy to be oxidized and burned, such as carbide, graphite and diamond, cannot be used immediately. They must be coated with heat-resistant and anti-oxidation metals to become cermet composite powder before they can be used as raw materials for thermal spraying.
⑵ for ceramics with high steam pressure and volatile sublimation at high temperature, such as magnesia, ca2co3, SiO2, etc., can not be used as raw materials for thermal spraying immediately.
⑶ for ceramic materials such as ZrO2 and TiO2 that will undergo crystal transformation when the temperature changes, modification treatment is usually carried out or high-temperature ceramic materials are selected.
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