TERM 1 Flashcards
machine design terms (14 cards)
What is the process of heating metal to a subcritical temperature, holding it for a suitable time, and then cooling slowly to reduce internal residual stresses?
Annealing
This process increases the machinability of the metal.
Heating above the transformation temperature and quenching usually in oil is known as what?
Hardening
This method increases the hardness of the metal.
What process involves reheating metal to a temperature below the transformation range followed by cooling?
Normalizing
This process attains desired properties of the metal.
What machine is used for producing holes in metal by the use of a cutting tool called drill?
Drilling machine
What type of machine is used to form metal parts by removing metal from a workpiece?
Milling machine
Fill in the blank: Heating above the transformation temperature and holding at that temperature is done for the purpose of _______.
increasing hardness
True or False: Tempering is a process that involves heating metal to increase its hardness.
False
Tempering is a process used to reduce hardness and increase toughness.
What is the purpose of stress relieving in metal treatment?
To reduce internal residual stresses
Fill in the blank: A machine tool used for producing holes in metal is called a _______.
drilling machine
What is the typical temperature range for annealing?
1000°F to 1350°F
What is the primary purpose of normalizing metal?
To produce a uniform structure
What is the process called when metal is heated above the transformation range and then cooled in still air at room temperature?
Normalizing
Fill in the blank: A machine tool used for removing metal from a workpiece by cutting is called a _______.
milling machine
What is the difference between hardening and tempering?
Hardening increases hardness; tempering reduces hardness and increases toughness
