103) What is the name if hot steel cooled rapidly to form a new structure ?

104) What is the process to add cutting ability and wear resistance on steel?

105) What is the heat treatment process to remove extreme brittleness and induce toughness and shock resistance in steel?

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?