what is the thinkness of the each HFVO
05-02-2018, 02:24 PM,
#1
what is the thinkness of the each HFVO
hi guys, what is arverage thickness of the each spray? 0.01mm per revolution or other parameter?
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05-10-2018, 08:39 PM,
#2
RE: what is the thinkness of the each HFVO
(05-02-2018, 02:24 PM)zhuminkun Wrote: hi guys, what is arverage thickness of the each spray? 0.01mm per revolution or other parameter?

There are a number of things that will effect deposition rates for HVOF. How fast you move the gun across the part surface will greatly effect deposition. Assuming you have correct standoff (approx. 8 in.), moving the nozzle collectively (rotation + gun movement) at 600 mm/sec I get almost 1.0 mm deposition with Tungsten Carbide Cobalt per pass.
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12-23-2022, 06:07 AM,
#3
RE: what is the thinkness of the each HFVO
The average thickness of each spray coat depends on several factors, including the coating material used, the spraying equipment used, and the desired thickness of the coating. Spray coatings are typically applied in layers with a thickness of around 0.01 mm to 0.1 mm per coat. The exact thickness of each coat will depend on the specific application and the desired final thickness of the coating. Following the recommended application guidelines is essential to achieve the desired thickness and performance.


Design Engineer at Testo India
Manufacturer Of Portable Combustion Efficiency Analyzers
https://www.testo.com/en-IN/
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02-17-2023, 09:02 PM,
#4
RE: what is the thinkness of the each HFVO
a "good" aero-spec WC-Co-Cr for example will be happiest applied around 0.0002" per pass, regardless of being onto a fixed part (ladder) or a rotating part. Speeds of control should be tailored to the specific part (RPM, step per revolution etc.).

That would be with a gas-fueled HVOF system. Currently, liquid-fueled HVOF systems are not approved for Aero coatings as far as I am aware. The best chance would probably be something like the WokaStar running ethanol, which is capable of aero-quality coatings (but was never submitted for approval by an OEM).

Metals applied with gas fuel, can run as high as 0.0005 per pass easily, and if the allowance for porosity is there, perhaps even higher per pass.

Large commercial parts are well served with liquid-fuel (JP-5000 and it's competitors) like the WokaJet, CarbideJet etc.) where the deposit rates can be much higher, but quality will not be the same (and usually not required) as compared to gas-fuel Aero coatings.
Spraying since '87. University of Metco alum (99-16)

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