Metals Recap and final learning

Metals Recap and final learning

Final lesson on Metal theory

Joining methods for metal

Multiple Choice

The property which means the surface of the metal is hard to scratch

• Hardness

• Toughness

• Ductile

• Malleable

Multiple Choice

What is mixed with iron to make steel?

• Carbon

• Zinc

• Copper

• Chromium

Multiple Choice

Which metal is best suited for Drill bits

• Highspeed Steel

• Stainless Steel

• Cast Iron

Ways to join metals

Riveting

Bolting

Welding

Brazing

Soldering

SMART Alloys

When a smart alloy is bent or twisted 

(called deforming)

it keeps its new shape until it is heated.

When the temperature is raised above a certain levelthe alloy returns to its original shape.

Some examples of uses for this is Stents and Self repairing glasses

Lost Pattern Casting

A pattern is made from polystyrene. The pattern is sandwiched between open boxes called a cope and drag

The boxes are filled with sand with runners and risers. The molten metal burns the polystyrene. Toxic fumes are produced

Jewellers using a similar process using wax, this produces a more complex shapes