Nitriding

[MrsEsterhouse]

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?

 

[arunmrao]

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

Save water Drink Beer

 

[swall]

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

 

[MrsEsterhouse]

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.

 

[swall]

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