Spraying on nitriding surface |
06-14-2007, 02:07 PM
Post: #1
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Spraying on nitriding surface
Hi forum,
I need help. :ashamed0002:We have troubles with HVOF spraying on nitriding surfaces. We use stainless steel FeCrNiBSiC. If coating contact with nitriding surface, his crashed. What I can to do? May be anybody recommend other material with microhardness around 800HV for repair and build-up. Thank you. | |||
06-14-2007, 02:31 PM
Post: #2
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RE: Spraying on nitriding surface
Hi Panf
Coating nitrided surfaces can be difficult. It is difficult to get a decent grit blast profile and many coatings appear not to bond too well compared to untreated steel, particularly if white layers are present. I would recommend removing the nitrided layer if that is possible. Regards Gordon www.gordonengland.co.uk www.surfaceengineer.co.uk Photography Obsession | |||
06-18-2007, 04:41 PM
Post: #3
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RE: Spraying on nitriding surface
Hi,
Nitrided layer removal, as suggested by Gordon is necessary to build up spray deposit.To soften the nitriding layer you can do a heat treatment at 500-540C,nitriding temperature.Alternatively you can use diamond/or BN tools to remove the thin nitride layer. ram chattopadhyay | |||
06-21-2007, 08:59 AM
Post: #4
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RE: Spraying on nitriding surface
Yes, I see
But what to do, if I coating the surface right against the nitrided surface I need to place masking shield over nitrided surface, and during spraying the coating deposit on her and crashed ![]() | |||
06-25-2007, 02:07 PM
Post: #5
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RE: Spraying on nitriding surface
Hi Panf
Sorry, I am having trouble understanding what you are trying to achieve. Could you try to give us more information (a sketch or drawing may be helpful). Regards Gordon www.gordonengland.co.uk www.surfaceengineer.co.uk Photography Obsession | |||
06-26-2007, 02:56 PM
Post: #6
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RE: Spraying on nitriding surface
yes, my English is very bad
![]() sorry I hope Gordon will attach the sketch to my post | |||
06-26-2007, 03:56 PM
Post: #7
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RE: Spraying on nitriding surface
Hi Panf
You can email me here or here with your image ideally in jpg or gif format. Or you could use one of many free file hosting sites, see http://www.gordonengland.co.uk/sef/image...t-139.html Regards Gordon www.gordonengland.co.uk www.surfaceengineer.co.uk Photography Obsession | |||
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