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Posted by Gordon England (62.252.0.5) on 16:29:18 18/11/04
In Reply to:Re: Flaws in stellite coatings posted by Paul Burkhardt
: The process used is Plasma spray not plasma transfer which I understand relies on fusion with the base metal. At the moment I believe that the coatings we have tried to machine are too thick. The pre-coat m/c drawing calls up sizes for stellite welding not plasma spray and I would guess that 5mm allowance would be too thick. Am I heading in the right direction?
Hi Paul
Yes, I think you are. I'm not sure what the recommended thickness limit would be for your particular coating, but typically, a coarse cobalt alloy would be limited around to 1 - 2 mm. Very fine powders would be very much lower at around 0.4 mm. This could well be causing your problems or at least contributing to them.
Regards Gordon
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