in spheroidising process, the steel is

Question

In spheroidising process, the steel is

Options:

A . Heated below the lower critical temperature and then cooled slowly

B . Heated up to the lower critical temperature and then cooled in still air

C . Heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C

D . None of the above

Answer: Option C
Explanation :

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