Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

DT > Theory - Metals and Alloys > Flashcards

Theory - Metals and Alloys Flashcards

1
Q

What is an alloy

A

A mix of metals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What do the metals we use come from

A

Ore - solid, natural material from which meal can be extracted. Blast furnace extract metal.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Give the 6 ways in which metals are formed

A

Flats
Square
Hexagonal
Angle iron

(Hollow)
Hexagonal
Square
Round

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Metals will…….

A

Run out

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Give some properties of pure metals

A

Expensive
Poor working properties
Can improve properties by adding other materials
Examples of pure metals- Aluminium, copper, silver and gold.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Give some properties of alloys

A

An alloy is a metal (parent metal) combined with other substances (alloying agents)
Superior properties
The parent metal is the majority of the alloy
e.g Mild steel is an alloy of Iron (parent metal) and carbon alloy agent)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What two groups are metals categorised in

A

Ferrous metals

Non ferrous metals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are ferrous metals

A

Contain Iron (FE) and small amounts of other metal for substances.

These are added to produce alloys with different properties

Almost all ferrous metals and alloys are magnetic. This is very useful in a recycling facility.

Disadvantage- they all rust

Protective coat needs to be added such as enamel paint to prevent rusting.

Stainless steel is one form of a ferrous alloy that is widely available and has anti-corrosion properties.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Give 5 ferrous metals or alloys

A 
Cast Iron
Mild Steel
High Speed Steel
High Carbon Steel
Stainless Steel
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is Cast Iron used for and what are it’s properties

A

Melts at 1200ºC
Iron and 3.5% Carbon
Compressive strength
Brittle

Manhole covers, brake disks and heavy machine parts.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is Mild Steel used for and what are it’s properties

A

Melts at 1600ºC
Iron and 0.2% Carbon plus Tungsten , Chromium and Vanadium
Very hard, poor tensile strength
Lathe cutting tools and drill bits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is High Carbon Steel used for and what are it’s properties

A

Melts at 1600ºC
Iron and 0.7%-1.4% Carbon
Hard but brittle
Screwdrivers and chisels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is Stainless Steel used for and what are it’s properties

A

Melts at 1600ºC
Iron and 18% Chromium, 8% Nickel, 8% Magnesium
Hard and tough
RESISTS WEAR AND CORROSION
Good appearance
Kitchen sinks, cutlery, teapots, surgical equipment,

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Give some properties of Non-Ferrous metals

A

Contain no Iron and therefore do not rust like Ferrous metals
Malleable and resistant to corrosion
Many do not require a protective coating, so they are very useful for products that might come into contact with moisture.
Majority are non-magnetic, which makes them useful in wiring and electrical devices
Some non-ferrous metals can be expensive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Give 7 different Non ferrous metals and alloys

A 
Aluminium
Copper
Tin
Zinc
Brass
Lead
Duralumin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is Aluminium used for and what are it’s properties

A 
PURE METAL
melts at 660ºC
Strong but lightweight, ductile.
Resistant to corrosion
Good conductor of heat and electricity

Scooters, drinks cans, greenhouse frames.

17
Q

What is Copper used for and what are it’s properties

A 
PURE METAL
Melts at 1083ºC
Malleable, ductile and tough
Resistant to corrosion
Good conductor of heat and electricity
Polishes well
Quite expensive

Central heating systems, plumbing

18
Q

What is Zinc used for and what are it’s properties

A 
PURE METAL
Melts at 420ºC
Weak in it's pure state
Resistant to corrosion
Easily worked

Fencing, Road barriers

19
Q

What is Tin used for and what are it’s properties

A

PURE METAL
Melts at 232ºC
Soft, ductile and malleable
Excellent resistance to corrosion

Used in electrical soldering and Tin Cans

20
Q

What is Lead used for and what are it’s properties

A

PURE METAL
Melts at 327ºC
heavy but soft, ductile and malleable
Environmentally unfriendly

Roofing

21
Q

What is Brass used for and what are it’s properties

A 
NON - FERROUS ALLOY
Copper and 35% Zinc
Melts at 1000ºC
Casts well, hard and tough
Aesthetically pleasing
Good conductor of heat and electricity

Trumpets, instruments, taps, phone cases

22
Q

What is Duralumin used for and what are it’s properties

A 
NON FERROUS ALLOY
90% Aluminium and 4% Copper + Magnesium
Almost as strong as Mild Steel, but 30% lighter
Strong, soft, malleable
Excellent corrosion resistance
Expensive

Fighter planes, bicycle frames

23
Q

Recycling metals is an………..process due to the…….within the product

A

Expensive

Impurities

24
Q

What are some environmental consequences of metals

A

Metal ores are taken from the Earth which have taken millions of years to form.
Non-renewable
Estimated that only 100 years left of Iron ore left in the Earth’s crust
Production pollutes the atmosphere
The production uses vast quantities of energy
Extraction leaves scars on the earths landscape

DT (24 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions