Metal Processes

Question 1

Work hardening

Answer 1

Hitting metal with hammers or rolling leads to improve its tensile strength and hardness. Causes less ductility and can cause cracks and damage. This is prevented by annealing

Question 2

Annealing

Answer 2

Used to make work hardened metal easier to work with.
Makes the metal less brittle and more ductile.
Metal is heated and cooled slowly at a specific temperature

Question 3

Case hardening

Answer 3

Hardening the surface of steel with carbon.
More resistant to scratching and surface indentation
The metal is heated nearly to its melting point, then rapidly cooled in water

Question 4

Press forming process

Answer 4

Sheet clamped over die
Hydraulic press pushes die into sheet material
Hydraulic die is lowered and pressed sheet is removed
Can be placed into further press forming machines to make complex parts

Question 5

Press forming scale of production

Answer 5

Mass or large batch