The heat treatment process applied to cold formed steel parts is ____________________?
Correct answer: D. Solution annealing
- A. Normalising
- B. Tempering
- C. Artificial ageing
- D. Solution annealing
Explanation
Cold forming introduces work hardening and residual stresses into steel, and solution annealing removes these effects while restoring a more uniform structure. Normalising and tempering are not the usual treatment intended for cold-formed austenitic steel parts.
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