Engineering Materials
Recrystallization temperature is one

At which crystals grow bigger in size
At which change of allotropic form takes place
At which new spherical crystals first begin to form from the old deformed one when a strained metal is heated
At which crystals first start forming from molten metal when it is cooled

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Engineering Materials
In spheroidising process, the steel is

None of these
Heated up to the lower critical temperature and then cooled in still air
Heated below the lower critical temperature and then cooled slowly
Heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C

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