What Are The Common Raw Materials For Thermal Spraying

       

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.