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Surface cracking after liquid nitriding in 16MnCr5 Material

Surface cracking after liquid nitriding in 16MnCr5 Material

Surface cracking after liquid nitriding in 16MnCr5 Material

Hello sirs,

With the reference to the following subjected information Surface cracking after liquid nitriding thread332-296883: Surface cracking after liquid nitriding, like wise we also identified the cracks in MPI from 0.21 - 0.24mm depth after liquid nitriding process of 16MnCr5 shaft. The process cycle is followed as 1. Cleaning 2. Pre-Heating @ 400°C - 1 Hour soaking 3. Liquid Nitriding @ 565°C - 6 Hours with carbonate of 19% 4. Water Quenching immediate (5 Mins) from liquid bath 5. Post Washing & Cleaning 6. Oxidation @400°C - 30 Mins
7. Water Quenching ( Separate ) immediate from oxidation bath 8. Washing & Cleaning 9. Inspection 10. Dispatch. The photographic samples of analysis is attached. Pls give suggestions.

Thanking you.

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