Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

Nitriding and Shot Peening

2000

Recently, a failure of an H13 gas nitrided part was experienced. The failure apparently originated at the nitride white layer and propagated through the diffusion layer and base material.

Has anyone experienced similar failures?
Does anyone know of an easy way to remove the white layer formed during gas nitriding besides secondary machining?
Finally, has anyone shot peened a nitrided surface with success? This last question addresses the question of possibly removing the white layer and introducing residual compressive stress to enhance fatigue properties.

Alan Simon
Dynisco HotRunners - Gloucester, MA USA

I've just read that citric acid [on eBay or Amazon] will remove the white layer. Or abrasive blasting. If the white is not removed From the surface it can cause fatigue problems in the future. I guess it did.

George Allen
- Harrisburg, Pennsylvania, USA
2005

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: