Which steel contains less than .85% carbon is cooled slowly below lower critical point?
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Explanation:
(a) Ferrite mainly
(b) Pearlite mainly
(c) Ferrite and pearlite
(d) Pearlite and cementite
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Explanation:
Heating is carried out (20°C) above the upper critical temperature of steel in case of ... transformation at temperatures less than 55°C below the critical is very long, ... i.e., annealing ferrous alloy by austenitising and then cooling slowly through the ... high carbon steels, tool steels containing a large amount of free cementite, ...
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