Mind Map by , created over 5 years ago

Rough notes on metals- GSCE Resistant materials

Created by fampulli over 5 years ago
Chemistry 3 Extracting Metals Core GCSE
Chloe Roberts
P2a revision (part 1)
AQA Biology 8.1 structure of DNA
Charlotte Hewson
The Heart And The Blood Vessels
Summary of Definitions/Key Terms for the PMP Exam
Andrea Leyden
Resistant Materials- 1.1 Material properties
Identify common tools and equipment
T Andrews
Plastics Quiz
Mr P Darvill
GCSE revision (Sustainability)
T Andrews
Chemistry Module C2: Material Choices
James McConnell
1 metal is mined or quarried
1.1 metal ore
1.2 lots of energy
1.2.1 all metals can be recycled less energy lower environmental impact
1.3 pollution
2 pure metals are made from a single refined element
2.1 or alloy- mixture of metals
3 two main families
3.1 ferrous-contain iron
3.1.1 small proportion of carbon medium carbon steel as carbon increases up to 0.4%, steel becomes harder and stronger but less ductile tough and malleable garden tools, springs high carbon steel 'tool' steel- hammers stainless steel alloy of steel with chrome and nickel hard and tough, much better corrosion resistance- but much more expensive and difficult to work
3.1.2 cast iron hard skin good compressive strength does not bend not very malleable
3.1.3 mild steel less than 0.3% carbon nails, screws high tensile strength ductile tough fairly malleable fairly cheap poor resistance to corrosion
3.1.4 some ferrous metals are magnetic magnets can sort retrieve them from landfill recycling
3.2 non-ferrous- no iron
3.2.1 aluminium, copper, zinc ductile + malleable+ low density + corrosion resistance alloyed to improve strength- airoplanes malleable, tough + v good elec conductor water pipes + electrical wires coated with plastic common alloys: brass (copper +zinc), bronze (copper + tin) often used as pure- less strong, but low melting point- easily moulded- car door handle excellent corrosion resistance galvanising- covering steel
4 treating metals
4.1 hardening
4.1.1 ferrous- heating +then plunging into cold water cooling quickly- hard but brittle
4.1.2 tempering then makes the material tougher and less likely to break heating to between 230-300C then cooling quickly
4.2 heat treatment- heating and cooling a metal in a controlled way, to change its properties
4.3 annealing: ferrous and non-ferrous
4.3.1 softer, less brittle, more ductile
4.3.2 heat- leave to cool slowly
5 most metals available in standard range shapes and sizes
5.1 standard forms save time and effort of machining metal parts
5.2 like pipes and bars

Media attachments