HEAT TREATMENT - Practice Mode
1) What are the various types of heat treatment processes?
Correct Answer: Annealing, Normalising, Hardening and Tempering
2) What is the process of heat treatment?
Correct Answer: The process of heating and cooling to change the structure and properties
Explanation:
Cast iron in which carbon is present in combined form or in carbide form known as white cast iron. White colour is due to carbide formation. It contain up to 2.3 percent carbon. It is hard and not suitable for machining. This iron has high tensile strength and a low compressive strength.
3) What are the various stages of heat treatment?
Correct Answer: Heating, Soaking and Quenching
Explanation:
Cast iron which contain carbon in free form, known as Gray cast iron. It is also known as commercial cast iron due to mostly used in commercial purpose. It contains 3 to 3.5 percentile carbon and rest iron. This cast iron has low tensile strength, high compressive strength and no ductility. It has excellence machining property. This metal is designate by FG followed by the digit show maximum tensile stress.
4) What is the name of the structure formed, if a steel is heated for about 723 Degree C?
Correct Answer: Austenite
5) Which heat treatment process is done to refine the grain structure of the steel?
Correct Answer: Normalising