: Study techniques like carburizing and nitriding used to increase wear resistance on the outer layer of a part. 5. Ferrous and Non-Ferrous Alloys

If you paste the original English text you have (even if it's rough or machine-translated), I can:

: These processes soften the material or refine the grain structure.

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: Be familiar with the Rockwell, Brinell, and Vickers testing methods.