METALS

METALS

1. Physical properties

   • strong
   • ductile
   • tough
   • plastic
   • electrical
   • magnetic
   • fusible
   • expansión/ contraction
   • chemical properties
   • oxidation
   • ecological properties
   • recyclable
   • toxic

2. Obtaining metals

   • surface mining
   • underground mining

3. Types of materials

   • ferrous
     • pure iron
     • cast iron
     • steel
   • non-ferrous
     • light and ultralight metals
     • heavy metals

4. Shaping techniques

   • shaping
     • rolling
     • extrusion
     • forging
     • press forging
     • punching
     • bending
     • wire drawing
   • powder metallurgy
     • 1.metal into powder
     • 2.metal pressed into dies
     • 3.heated to metals melting point
     • 4.pressure is applied
     • 5.object left to cool
   • casting
     • process
       • 1.metal heated
       • 2.metal poured into the mould
       • 3.left to cool until solidification
       • 4.piece extracted from the mould
     • centrifugal casting

5. Cutting, joining and finishing

   • marking
   • cutting
   • drilling
   • power tolos for cutting
   • shaping
   • rough finishing
   • power tools for rough finishing
   • permanent joints
   • temporary joints
   • finishes