Dissemination of IT for the Promotion of Materials Science (DoITPoMS)

DoITPoMS Micrograph Library Full Record for Micrograph 411

Full Record for Micrograph 411

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Micrograph no
411
Brief description
Cast iron, containing phosphorus
Keywords
alloy Link to MATTER Glossary entry for alloy, carbon, cast iron Link to MATTER Glossary entry for cast iron, iron, metal, phosphorus Link to MATTER Glossary entry for phosphorus
Categories
Metal or alloy
System
Fe-C-X   Link to phase diagram
Composition
Fe, C 3.46, Si 0.12, Mn 0.33, P 1.91, Cr 1.02 (wt%)
Standard codes
Reaction
Processing
Sand Cast
Applications
Sample preparation
Picral
Technique
Reflected light microscopy
Length bar
100 μm
Further information
The presence of phosphorus in cast iron has no great effect on the graphite cementite ratio but serves to make the metal very fluid due to the creation of a low melting point phosphide eutectic. This may result in shrinkage porosity in large castings. Manganese serves to remove sulphur from the casting and since sulphur promotes cementite, the manganese will harden the iron.
Contributor
Dr R F Cochrane
Organisation
Department of Materials, University of Leeds
Date
04/09/02
Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales
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