I am looking for information, specs etc. on plasma ion nitriding of gears in helicopter transmission.
Will appreciate info on manufacturers of these gears to contact them for current practice.
Pramod Kotwal
Instead of using salt bath or gas nitriding use plasma nitriding (ion nitriding). It will give you a far superior surface with negligible and predictable growth.
Contact me if you need details.
Pramod Kotwal
info@nitron.nu
Ni itself will not form nitrides but other alloying elements in your Ni alloy could.
What is the composition of the Ni alloy ?
How about nitriding a sample of that alloy ?
Is it being gas-, salt bath- or ion nitrided ?
Your specs. of nitriding, white layer composition (gamma prime or epsilon or...
You are probably referring to the network of carbo-nitrides
that precipitate in the diffusion zone at the former austenite grain boundaries.
Since these carbonitrides are brittle, the mechanical properties of grain boundaries with these precipitates differ from those of the grain boundaries...
You should try ion nitriding the 17-4. Gas or salt bath nitriding will warp the part and possibly not work.
Titanium, either grade 2 or grade 4, ion nitrided will also work.
Contact me for details.
Pramod Kotwal
pramodkotwal@nitron.ne
I think titanium and its alloys offer the best solution. When considering the cost of material remember that you need equal size (volume) not weight of the material. So although titanium costs much more per kg than steel alloys the same size part will only weigh half as much and thus the...
