Gordon England Surface Engineering Forum



Re: PTA coatings of Nimonic Valves

Posted by ram chattopadhyay (24.71.223.148) on 16:35:13 03/05/06

In Reply to: PTA coatings of Nimonic Valves posted by Pepe

Hi,
Do you rally need a coating on Nimonics unless you need to dilute the exceptionally high strength of Nimonic at as high a temperature as 800*C, due to gamma prime phase(Ni3AL).If you need to put a coating on Nimonics the best buffer is possibly Inconel625.Stellite cannot be directle put on Nimonic by even in low dilution PTA process.You need Inconel buffer.Dilution in PTA can be controlled within 5%.Chack for more details on PTA overlays in my book "Advanced Thermally Assisted Surface Engineering Processes", Springer Verlaug(earlier Kluwer Academic Publishings), NY, 2004.
ram
'


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