Laminar oxide in hvof coating
09-13-2012, 04:34 PM,
#1
Laminar oxide in hvof coating
Hi everyone.

I am new to thermal spray process. Recently one of our hvof spray powder, amperit593, is showing obvious multiple layer in its coating. I presume this problem is called laminar oxide? I'll try to load the metalography pic when i get the opportunity.
The machine was just calibrated by oem just 2 months back, and we rechecked the coating recipe. Nothing was changed. We also changed multiple powder batches to try, showing the same results.
Does anyone have any opinion on this?

Thanks
Reply
09-13-2012, 11:09 PM,
#2
RE: Laminar oxide in hvof coating
If you do not change anything, in parameters and spray media, you must check the cooling air for oil, or quality of gases been used, of course you must check gun geometry before.
Best regards
Luigi
Reply
02-24-2014, 09:41 PM,
#3
RE: Laminar oxide in hvof coating
Often ifthe powder feed rate is too high you will get layers
Reply




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