Metal Processes

Question 1

Work hardening

Answer 1

-when a non-ferrous metal is continuously bent, hit, or shaped over a period of time
-desirable when shaping copper pipes
-causes splitting and snapping

Question 2

Annealing

Answer 2

-Annealing involves heating steel to a specified temperature and then cooling at a very slow and controlled rate
-It increases its ductility and reduce its hardness, making it more workable

Question 3

Tempering

Answer 3

-Tempering involves heating the metal to a precise temperature below the critical point
-often done in an air vacuum
-used to increase the toughness of iron-based alloys

Question 4

Case hardening

Answer 4

-hardens the surface of a metal object while allowing the metal deeper underneath to remain soft
-thin layer of harder metal at the surface