metals

Question 1

what are the 4 different types of steel?

Answer 1

low carbon steel, medium carbon steel, high carbon steel, cast iron

Question 2

what does ferrous metals contain?

Answer 2

iron

Question 3

properties of mild/low carbon steel

Answer 3

ductile, tough

Question 4

uses of low carbon steel

Answer 4

nuts, bolts, white goods

Question 4

properties of medium carbon steel

Answer 4

tough, resistant to wear

Question 5

uses of medium carbon steel

Answer 5

springs, gears, gardening tools

Question 6

properties of high carbon steel

Answer 6

hardness

Question 7

properties of cast iron

Answer 7

hardness, brittle

Question 8

properties of aluminium

Answer 8

strong, ductile, good conductor of electricity

Question 9

what are benefits of alloying metals?

Answer 9

Changes the melting point
Changed colour
Enhanced properties

Question 10

what are 3 alloys which have steel in them?

Answer 10

stainless steel, high speed steel, die steel

Question 11

properties of stainless steel?

Answer 11

tough, wear resistant, hard, strong, corrosion resistant

Question 12

properties of bronze?

Answer 12

hard, brittle

Question 13

what are the main differences of H and I beams?

Answer 13

H beams are heavier and can hold mroe force, H beams span longer than I, I beam is all one peice of steel whereas H is joined together

Question 13

what is blanking?

Answer 13

When the piece that has been punched out of the sheet is to be used, this is called a blank. the opposite where you use the sheet with the hole is called piercing.

Question 14

what is press forming?

Answer 14

bending malleable materials with a punch

Question 15

what are dies made out of and why?

Answer 15

die steel as it is tough enough to resist impact from the material being worked on

Question 16

advantages of sand casting

Answer 16

Complex 3D shapes can be produced
Its appropriate for small runs
Automated processes are suitable for longer production runs

Question 17

disadvantages of sand casting

Answer 17

Poor surface finish
Not as accurate as other methods
Only suitable for small production runs

Question 18

what is die casting?

Answer 18

injection moulding for metal with low melting points where the mould is called a die.

Question 19

advantages of die casting

Answer 19

smoother finish than sand casting
accurate and high detail
suitable for large scale production
low energy costs as metals have low melting point

Question 20

what are functional reasons for putting finishes on metals?

Answer 20

insulation, antibacterial, stain resistant, protection against attack from nature

Question 21

what are the different types of attacks from nature metals will need protection from?

Answer 21

Oxidation and corrosion

Question 22

what is drop forging?

Answer 22

metalworking process where heated metal is shaped using a hammer

Question 23

what is welding?

Answer 23

a metal joining process which creates a circuit between the wire fed by the welding gun (anode) and the metal being welded (cathode) to create an arc of electricity and melt the metal being worked on so it can be joined to something else

Question 24

what are pop rivets?

Answer 24

semi-permanent fixings between two sheets of metal

Question 25

what is brazing?

Answer 25

a metal joining process where two or more metal parts are joined by melting a filler metal which creates a strong bond between them.

Question 26

what is soldering?

Answer 26

a metal joining process which joins delicate peices like electricals or jewellery using a filler metal called solder

Question 27

what is anodising?

Answer 27

a metal finishing process which can only be used on aluminium which gives it a shiny colour and improves its durability and hardness

Question 28

what is electroplating?

Answer 28

a metal finishing process to improve the aesthetics of metal typically jewellery by allowing ions from anode to coat the cathode. it can also improve metals properties

Question 29

what is metal hardening?

Answer 29

when a metal is cold worked and becomes harder due to the stress and distortion

Question 30

what are examples of cold working processes?

Answer 30

bending, rolling, drawing, hammering

Question 31

what is the impact of metal hardening?

Answer 31

the metal becomes harder but also more brittle

Question 32

What is the purpose of heat treatment in metals?

Answer 32

To alter the properties of metals e.g. make them harder, stronger, more malleable

Question 33

What is annealing and what does it do to a metal?

Answer 33

A heat treatment which softens the metal making it more ductile and malleable