The purpose of heat treatment is
Change the mechanical property of steel
To change the internal structure of steel
To change the appearance of the component
To change the chemical property of steel
Answer
Heat treatment of metal is necessary
To produce certain desired properties
To make good appearance on the component
To increase strength of the metal
To make the metal rust proof
The instrument used to measure high temperature in the furnace is
Thermometer
Barometer
Colorimeter
Pyrometer
What is the main purpose of annealing ?
To improve machinability
To improve magnetism
To increase hardness
To increase toughness
Which one of the following processes by which steel is heated to the required temperature and then cooled slowly in the furnace itself ?
Tempering
Hardning
Nitriding
Annealing