Metals and casting Flashcards
1
Q
What are the two ways of casting metal?
A
Sand casting and die casting
2
Q
What can you make from die casting?
A
Taps, model cars
3
Q
What can you make from sand casting
A
‘the slingshot’ , caterpillar tracks, engine blocks, garden furniture
4
Q
What is die casting
A
Forcing molten metal under high pressure into a die, or allowing molten metal to flow into a mould by gravity
5
Q
What is sand casting
A
molten metal is poured into a sand mould that contains a cavity of the desired shape of an object or component
6
Q
Name 2 advantages of die casting
A
- high production rate
- good surface finish
- elements such as screw threads can be included in casting
- good control over mould temperatures during the process
7
Q
Name 2 disadvantages of die casting
A
- high set up costs
- long lead time
- limited sizes possible
- not all alloys are suitable for the process
8
Q
Name 2 disadvantages of sand casting
A
- mould can only be used once
- slow production rate
- labour intensive
9
Q
Name 2 advantages of sand casting
A
- inexpensive
- complex shapes are produced
- large components are produced
10
Q
Name the three different types of metals
A
- Ferrous - metals that contain iron
- Non - ferrous - metals that contain no iron
- Alloys - metals including two or more metals coming together as one
11
Q
Name examples of ferrous metals
A
- Cast iron - machinery, components for machines
- mild steel - nuts and bolts, general engineering
- carbon steel - drills, cutting tools
12
Q
Name example of Non-ferrous metals
A
- Aluminium - castings, engine components, aircraft
- copper - electrical cables, central heating
- zinc - castings, batteries
13
Q
Name examples of alloys
A
- stainless steel - medical tools, kitchen utensils
- Duralumin - Auto mobiles, aviation
- Brass - plumbing fittings, electrical components
