How to choose thermal spray powder -Part 2: Carbide powders
Selecting the right material is the priority condition for successful thermal spraying coating application on the workpiece surface. APT can help you choose the most suitable material for your application from our wide range of high-quality material products.
1 Classification of thermal spraying powders.
MetalsPure:
Cu, Al, Zn, Ni, Fe, Mo, W, etc…
Alloys: CuAl, NiCr, NiAl, NiAlMo, NiCrSiB, Steels, etc…
Super alloys: MCrAlY, Inconel, Stellite, Tribaloy, Hastelloy, etc..
Ceramics
Al2O3 based, TiO2 based, Y2O3 based, Cr2O3 based, ZrO2 based.
Carbides
Tungsten carbides: WC-CoCr, WC-Co, WC-Cr3C2-Ni, WC-Ni, WC-CoCrNi, etc..
Chrome carbides: Cr2C3-NiCr, Cr3C2-NiCrMoNb, etc…
Abradables
AlSi-Polyester
Basic properties and manufacturing process of thermal spraying powder.
1 Chromium carbide based powders
* Manufacturing process：Made by Sintered, Blend, Agglomerated and sintered, Densified, Activated
* Chemical composition of powder： Cr3C2, Cr3C2-7NiCr, Cr3C2-25NiCr, Cr3C2-30NiCr, Cr3C2-65NiCr, Cr3C2-40NiCr
* Excellent for high temperature cavitation, abrasion and sliding wear
* Good hot gas and corrosion resistance
* Hard and wear resistance
* Higher CrC increase hardness
* Useful up to 871℃
* Cr3C2-30NiCr made by activated process improved DE and stress properties over traditional blended CrC-NiCr
2 Tungsten carbide based powders
* Manufacturing process：Made by Sintered, Cast, Blend, Agglomerated and sintered
* Chemical composition of powder： WC-8Co, WC-12Co, WC-17Co, WC-10Ni, WC-Co-Cr, WC-CrC-Ni
* Excellent low temperature wear resistance properties
* Dense, hard coating with marginal oxideation and corrosion resistance
* Useful up to 482℃
* WC-12Co made by agglomerated and sintered has densified structure with finedcarbide dispersion promatefiner microstructure, better DE and denser, smoother coating
As mentioned at the beginning, the correct selection of powder is the key to successful coating application. However, the selection of powder is indeed a very complex process. Without enough experience and theoretical basis, it is difficult to choose a very suitable powder. The factors we should consider include but are not limited to:
*The manufacturing level of powder suppliers;
*Powder manufacturing process, mechanical crushing, sintering, atomization and agglomeration, etc;
*Characteristics of spray gun, such as sg100 spray gun of Praxair and F4 spray gun of Metco.
*In practical application, the spraying powder parameters need to be adjusted according to the characteristics of spray gun; Size, material and other characteristics of the workpiece.
APT does not produce powder, but the experience accumulated in coating application for a long time enables us to find suitable powder among many factors and obtain successful coating application.
Therefore, whether you need us to spray coating for your parts, recommend a suitable powder for you, or provide an overall coating solution for your parts, you can contact us immediately.
## Our contact information is：E-mail Fchen@APTcoating.com
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# Ceramics
# Carbides
