ChangingProperties+StructuresOfMetals Flashcards
1
Q
What is annealing
A
Heating a material to make it more easy to work with
2
Q
What is hardening
A
Controlled heating+cooling to get steel to best strength and toughness
3
Q
What is tempering
A
Creates greater toughness by decreasing hardness of alloy
4
Q
What is Case hardening
A
Heating a metal to red hot then instantly plunging into cold liquid
5
Q
2 dis/advantages of annealing
A
-reduces material fracture
-higher ductile
-time consuming
6
Q
2 dis/advantages of hardening
A
-higher strength and durability
-increased lifetime
- high chance of distortion
7
Q
2 dis/advantages of tempering
A
-less hardness therefore high ductility
-increases strength
-quenching makes it brittle
-metal can easily fracture
8
Q
2 dis/advantages of Case hardening
A
-increases steel strength
-easier to weld
-outside of metal is harder than inside
