Heat Treatments Flashcards
1
Q
Normalising
A
- Heating to above upper critical point
- Cool in air
- Removes stresses
- Tough & Ductile
2
Q
Annealing
A
- Heating to suitable temperature for long time
- Soften work hardened metals
3
Q
Hardening
A
- Heated above lower critical point
- Increases hardness and strength
4
Q
Quenching
A
Quickly cooling a hot metal with liquid