I would like to ask the differences between oxyfuel spraying and plasma spraying and what are the advantages of thermal spraying over electroplating.

Hi Gordon,

Just read your reply today.

I hope you don't mind my continuing the discussion on the abradable coatings.

I want to ask you the possible causes of getting inconsistent hardness values from time to time.
I mean what critical factor can give significant contribution to this inconsistency.
We spray the specimens of Ni 75 - Graphite 25 coating as an abradable layer for compressor rotor of aircraft engine.
Although we always obtain hardness values within the range as recommended by the OEM and/or the material manufacturer (i.e. 30 - 50 HR15Y ) , there is still an inconsistency in the test results.
Sometimes they are all above 40 HR15Y , but lately they are all in the lower range i.e. 30 - 40 HR15Y only.
This makes us difficult to release the test result as the representative of the sprayed part, in a way that we would only find out the actual quality of our thermal spray process result after the part is installed and tested as a complete engine.
If the part has not released with top quality, we are afraid it will abrade easily and during engine testing (high pressure, high temperature) will affect other parts which are very costly.

Hope you or others can help me again this time and share the knowledge.

Thank you.

Gordon Wrote:Hello and welcome to the Surface Engineering Forum.

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I m hvof sprayer on jp 5000,I have 3 years experience in welding stellite(pta).I have many knowledges in mechanical fabrication(8 years experience).I m autonom,hard worker and winner.if somebody interested to creat welding and coating activity ,I m looking to earn more;please let me know if u are interested.I can move every where in the world

Hallo,
I would like to know about SPM for premachining , coating and grinding of MG Cylinder of paper mill.
Regards
Vijay Deshpande

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Dear Colleagues,

If any interest in the Nordic Market, needing correct translations of sales or technical material to Finnish or Scandi-dialects, please contact me.

br bhe

hello everybody
I m used to spray carbide on jp 5000.and have no problems for parameters.but if once I have to spray other materiels.I wonder if i have to change all parameters,or only distance and nozzle.thanks for ur reply

Dear all, i would like to know whether it is possible to carry out UT on Thermal sprayed deposits?

Hello!

Any body used plasma torch SG-100 by Praxair (or Thermach) with "Mach I" nozzle?
Tell me please what gases nead for this equipment and theirs flow rate.
I was try work with Ar and H2, and I can't take "Mach I" - only subsonic flame

Thanks.