106) What is the process of steel being heated to required temperature and held in the same temperature for a period of time?

107) What is the purpose of brine solution, water, oil and air used in heat treatment process?

108) What quenching media is used for special alloy steels?

109) What is the heat treatment process of reheating the hardened steel to a temperature below 400 Degree Centigrade followed by cooling?

110) What is the advantage of annealing ?