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Nitriding

Nitriding

Nitriding

(OP)
I have the rotating disk of a rotary screen changer that has been damaged.  The two faces of the disk have been damaged.  The disk is made of a nitrided steel. If I have the plates lapped flat again.  Would it be possible to have the disk nitrided again?  Or can you only nitride a metal once?

  

RE: Nitriding

Renitriding the steel should be possible in my opinion,provided wear and lapping have removed the original nitrided layer.

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RE: Nitriding

What is the base alloy? What type of nitriding process was used and what was the original case depth?

RE: Nitriding

(OP)
In my conversations with the origional manufacturer there opinion is I should by a new unit.  That simply isn't an option.
  I don't know what the origional material was, or the nitriding depth.  I am also pretty sure as they want me to by a new one they are not about to tell me, as it is of no benifit to them.
  Am I correct in guessing that nitriding generally only penetrates .015".  
  If I am only lapping the faces, would it matter in the re nitriding process that the whole thing was origionally nitrided?

Thanks for the good input.  I know it is hard to give good answers with out all the facts.

RE: Nitriding

If your damage is so slight that it can be removed by lapping, I think I would lap the surface, then use as-is.

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