Explain following process of steel:

Question

KollegeApply · Accepted Answer

(a) Annealing: It is process of heating steel to redness followed by slow cooling due to this steel becomes soft and pliable. (b) Hardening or Quenching: It is a process of heating steel to redness followed by sudden cooling by plunging the red hot steel into water or oil. Steel becomes brittle and hard. (c) Tempering : It is a process of heating the hardened or quenched steel to a temperature much below redness (200-$350^\circ$C) followed by slow cooling steel loses its brittleness completely or partially depending upon time and temperature. (d) Nitriding : Formation of a layer of iron nitride by heating steel at 500-$600^\circ$C in chamber of ammonia for 3-4 days is called nitriding. Steel becomes harder by this treatment

AChoose Your Answer