Annealing of cast iron__________________?
Correct answer: C. Softens it to facilitate machining
- A. Increases the strength
- B. Decreases the free carbon
- C. Softens it to facilitate machining
- D. None of these
Explanation
Annealing cast iron reduces hardness and relieves internal stresses, making the casting softer and easier to machine. It is not primarily a strengthening treatment.
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