Nitriding of steel is a process for________________?
Correct answer: A. Case hardening
- A. Case hardening
- B. Spheroidising
- C. Normalising
- D. Annealing
Explanation
Nitriding diffuses nitrogen into the steel surface to form hard nitrides, producing a hard wear-resistant case while retaining a tougher core. It is therefore a case-hardening treatment, not an annealing or normalising process.
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