Mapa mental

Metals

Jorge Navarro Fidalgo Espanhol

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Metals

Properties
- hard
- often shiny
- non-adhesive
- cold and smooth
Obtention
- surface mining
- underground mining
- metals are taken from minerals contained in rocks
Clasification
- ferrous
  - are common
    - contain iron
  - iron alloys (by adding carbon)
    - Pure iron
      - not much carbon
    - Steel
      - harder and stronger than iron
    - Cast iron
      - a lot of carbon
- non-ferrous
  - light and ultra-light
    - aluminium
    - titanium
    - magnesium
  - heavy
    - lead
    - zinc
    - tin
    - bronze
    - copper
    - brass
Working with metals
- shaping
  - rolling
  - extrusion
  - forging and press forging
  - punching
  - bending
  - wire drawing
  - powder metallurgy
  - casting and centrifugal casting
- marking
  - centre punch
- cutting
  - circular saw
- drilling
  - drill
- joints
  - permanent
    - rivet
    - adhesives
    - press fit joint
    - welding
  - temporary
    - nuts and bolts
    - screws
    - threaded stay bolts
    - keyed joints
    - splined shafts
    - sliding joints
- shaping/turning
  - chisel
- rough finishing
  - file
- finishes
  - grinding
  - lapping
  - polishing
  - buffing
  - coatings
alloys
- mixture of 2 or more chemical element
  - the primary element is a metal