Hi Arturas
Quote:Hi Gordon,
Is it possible that the problem relatet to carrier gas - nitrogen flow? After we decreased rate of nitrogen : flometers readings-25(acording book) to 15 units this problem absolutely dissapeared.
Regards
Arturas
Yes
Only problem is to make sure that this parameter change is not just compensating for other faults in your set-up.
That seems a big change from recommended parameters. Is the powder one recommended by your equipment supplier? I'm trying to establish is whether your HVOF set-up has been optimised for this particular powder. If you are using an alternative/equivalent powder to the one your equipment supplier recommends, then parameter optimisation/changes may be required. Alternative/equivalent powder may look the same and display the same overall particle size range, but from my experience can produce very different spraying and coating characteristics. So take care, cheap powder can sometimes (not always though
) be a very expensive choice when things go wrong.