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AS Product Design > Metals > Flashcards

Metals Flashcards

1
Q

What are the three common metals?

A
  • Ferrous
  • Non-ferrous
  • Alloys
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2
Q

Name some Ferrous metals

A
  • Cast iron
  • Steels
  • Mild steel
  • Medium carbon steel
  • High carbon steel
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3
Q

Name some non-ferrous metals

A
  • Aluminium
  • Copper
  • Lead
  • Tin
  • Zinc
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4
Q

Name some Alloys

A
  • Brass
  • Bronze
  • Stainless steel
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5
Q

What does Ferrous metal mean?

A

Metals which contain iron

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6
Q

What does Non-Ferrous metal mean?

A

Metals which do not contain iron

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7
Q

What does Ferrous alloy mean?

A

A mixture of two or more metals but at least one metal is iron

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8
Q

What does Non-Ferrous alloy mean?

A

A mixture of two or more metals which do not contain iron.

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9
Q

Name some common metals

A
  • Iron
  • Copper
  • Aluminium
  • Lead
  • Tin
  • Zinc
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10
Q

What is pig iron?

A

Iron which has just come out of the blast furnace and is not at a high enough quality yet.

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11
Q

How is pig iron converted?

A

By adding carbon into its structure, this is done in a oxygen furnace.

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12
Q

Where is mild steel usually used in?

A
  • Nuts
  • Bolts
  • Washers
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13
Q

Where is medium carbon steel usually used in?

A
  • Springs

- Garden tools

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14
Q

Where is high carbon steel usually used in?

A
  • Hand tools
  • Dot punchers
  • Chisels
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15
Q

Where is cast iron usually used in?

A
  • Machine parts
  • Brake discs
  • Engines
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16
Q

What is aluminium use in?

A

-Kitchenware e.g. saucepans

17
Q

What is Copper used in?

A
  • Electrical contacts
  • Domestic pipes for heating and water
  • Electrical cables
18
Q

What is Gold used in?

A
  • Jewelry

- SIM cards

19
Q

What is lead used in?

A

-Brickwork

20
Q

What are the benefits of alloying?

A
  • Changes the melting point
  • Changes the colour
  • Increases strength, hardness and ductility
  • Enhances resistance to corrosion
  • Changes electrical/thermal properties
  • Improves flow properties
21
Q

What does oxidation mean?

A

when a material comes in contact with oxygen the result is an oxide layer is formed over the surface of the metal. this acts as protection.

22
Q

What is work hardening?

A

The name given to the effects of processing e.g. rolling, bending or hammering a material while it is cold.

23
Q

What are the common heat treatments?

A
  • Annealing
  • Hardening
  • Tempering
  • Normalising
24
Q

What is annealing?

A

heating up metal so that you can easily work with it

25
Q

What is hardening?

A

heating the metal to cherry red followed by rapid cooling

26
Q

What is tempering?

A

removing any brittleness that may be present in the hardening material.

27
Q

What is welding?

A

The term given to joining materials together by heat fusing the components together

28
Q

What is finishing?

A

the removal of blemishes or blurs in a material

29
Q

What is press forming?

A

Press forming is carried out at room temperature and it is when metals are press and cut into shapes

30
Q

What is embossing?

A

similar to press forming but is used to make decorative features which are punched into metals.

31
Q

What is sand casting?

A

this is where you use sand as molds and fill it with molten metal.

32
Q

What are the advantages of using sand casting?

A
  • Complex 3D shapes
  • Can produce hollow sections
  • Good for small runs
  • Automated processes are good for the long run
33
Q

What are the disadvantages of sand casting?

A
  • Poor surface finishing
  • Not accurate as die casting
  • Low rate of out put only good for small runs
34
Q

What is die casting?

A

melting metal and pouring it into a mold

35
Q

What is a Flux?

A

A chemical used to Prevent oxidation of the material at the joint areas

36
Q

What is sintering?

A

process where materials are crushed into powder and compacted into a die which will give the product its final shape.

37
Q

What is forging?

A

It can be carried out by hand or machine, forging is done while the metal is hot as it requires less energy to achieve the result. you hammer the metal into place.

AS Product Design (16 decks)

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