Growth due to Plasma Nitriding
Growth due to Plasma Nitriding
(OP)
I am planning to make a small batch of close tolerance shafts from a 4340 VAR steel.
The shafts will need significant machining on their ends and we plan to stress relieve at 630degC prior to grinding.
Once ground we would like to Plasma Nitride the shafts (400 degC) and use them without further work.
The case depth we will need is very shallow but we need a shaft tolerance of 17.992 to 18.000mm.
The company that carries out the Plasma Nitriding say that I will not need a 'process grinding allowance' but I am not 100% confident.
I have limited experience of plasma Nitriding and I am not sure how much growth, if any, will occur.
Any information about typical growth would be very helpful.
The shafts will need significant machining on their ends and we plan to stress relieve at 630degC prior to grinding.
Once ground we would like to Plasma Nitride the shafts (400 degC) and use them without further work.
The case depth we will need is very shallow but we need a shaft tolerance of 17.992 to 18.000mm.
The company that carries out the Plasma Nitriding say that I will not need a 'process grinding allowance' but I am not 100% confident.
I have limited experience of plasma Nitriding and I am not sure how much growth, if any, will occur.
Any information about typical growth would be very helpful.





RE: Growth due to Plasma Nitriding
If it were me I would grind in the bottom half of the tol and let it go.
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
RE: Growth due to Plasma Nitriding
RE: Growth due to Plasma Nitriding