Ion Nitrite 2

[mrconfident]

Hello guys,

I am in the middle of a design process and cannot answer this question, hopefully someone can shed some light on the issue?


Our vendor has come back to us with a question regarding the thickness of Ion Nitrite for a part. We currently do not specify a thickness when specifying Ion Nitrite. The part is made of 410 SS heated treated to 18-22 HRC. Could anyone please take a moment to answer some questions and enlighten us on this process?



- What is a typical thickness use?

- What other thicknesses are used?

- Are there any advantages and disadvantages to using those thicknesses?

- What process does one need to go about in order to determine the necessary thickness when specifying Ion Nitrite of a part?


Thank you for your time,

 

[swall]

In my experience, .005" to .010" is a common thickness range for ion nitriding. It all depends on what you are trying to do. What is your application?

 

[mrconfident]

Thanks for the respond. I am in the Petroleum Industry, with emphasis in ESP applications. In a nutshell, we supply the Electrical Submersible Pump, with electricity. You can think of our parts pretty much as hollow pipes which holds cables/conductors inside of them.

 

[mfgenggear]

mrconfident

The nitride is a case depth and is not a coat.
it will penetrate into the parent material.
there will be a light build up but not much.

as swall said is good recommendation
except I would suggest .005 min after any machining
on that surface, or if it's finished before nitride.
410 SS will nitride but not deep.

check out AMS 2759/8 as guide.

be aware if it's selective Ion Nitride. It will require tooling.
if it's nitride all over no tooling required except for racking.

 

[mrconfident]

mfenggear

Thank you for the enlightenment. I did not know this, I thought that Ion Nitride was a process similar to Zinc Plating on alloy steel parts.

With that said, is there anything else that needs to be specify when a part needs to be Ion Nitride? It sounds like the vendor doesn't know what their talking about if they're asking for a thickness....?

Please elaborate.

Thank you

 

[arunmrao]

mrconfident, you will definitely appreciate more about surface treatments after referring to the book mentioned below.Hope you will like it and find it useful.


"Practical nitriding and ferritic nitrocarburizing / David Pye
p. cm.
Includes bibliographical references and index.
1. Nitriding. 2. Case hardening. 3. Steel—Heat treatment. I. Title.
TN752.C3P4 2003
671.3'6—dc21
2003056298
ISBN: 0-87170-791-8
SAN: 204-7586
ASM International®
Materials Park, OH 44073-0002

http://www.asminternational.org

I have not failed. I've just found 10,000 ways that won't work." — Thomas Edison
_____________________________________

 

[mfgenggear]

Normally specified is follows

specify the applicable spec (commercial or aerospace)
specify if all over or specific area (Bearing surface or gear teeth)

The effective or total case depth~ (.005 min)

the case hardness ~ (15N 89 Min)

the core hardness ~ 24 HRc
(specify core hardness so the tempering temp. is above the nitride process temp.) "temper at 1100
for 410 ss " ref