How to choose thermal spray powder -Part 1: Pure Metal and alloy

In order to obtain suitable and high quality thermal spraying coating, three aspects are very important. The first is the selection of powder, the second is the performance of spraying equipment, the third is the control of spraying process. APT tells you how to do the first step: powder selection.

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 Aluminum based powders
* Used for corrosion protection coating
* Good for repair of Al based parts
* Good for electrical conductivity
2 Cobalt based poeders
* Excellent oxidation resistance
* Replaces Tungsten carbide coating in high tem[erature application
*Suited for repair of Co based for repair of Co based parts
* Dense coating with low porosity and oxide content
* Machining performance
3 Iron based powders
* Excellent oxidation resistance
* Smooth coating which is easy to machining
* Good again fretting, cavitation, and erosion
* Used for dimension repair and build-up
4 Nickel based powders
* Good corrosion and oxidation properties
* Coating are dense and moderatery hard, easy to machine
* Good for repair of Ni Based and SS parts
* Can be used for a ceramic bond coat

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

 

For more information about powder selection, please click to continue browsing.
# Ceramics
# Carbides
# Abradables

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cfevan

cfevan
Graduated from South China University of Technology, majored in metal materials, has been engaged in thermal spraying technology development since graduation in 2010. He has served as thermal spraying supervisor in Praxair and Pratt&Whitney engine company for many years. Main technical engineer of APT company.
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