Gordon England Surface Engineering Forum



Re: Coating on Chilled Cast Iron Rolls

Posted by Gordon England (62.252.0.12) on 15:00:59 14/06/06

In Reply to: Re: Coating on Chilled Cast Iron posted by Coating on Chilled Cast Iron

Hi Azim
Not too sure what you mean by making grooves. I assume you are not machining into the coating, but grooving or rough threading the substrate to increase roughness in surface preparation for coating. A popular method many years ago before the use of the more modern day bond coat materials. If you feel the need to groove, I think grinding would be needed as the material is too hard to be knurled threaded by turning.
Ideally use a course alumina grit at high pressure for blasting followed by Nickel 5% Aluminium alloy for bond coating. 13Cr steel coatings fortunately are low shrink/low stress and are good for thick coatings.
Regards Gordon


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