plating, anodizing, & finishing Q&As since 1989
Nitriding and Shot Peening
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.
Dynisco HotRunners - Gloucester, MA USA
I've just read that citric acid [on eBay or Amazon affil link] 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
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