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Cast iron, containing phosphorus | by CORE-Materials
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Cast iron, containing phosphorus

DoITPoMS, University of Cambridge

 

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.

 

System

Fe-C-X

 

Composition

Fe, C 3.46, Si 0.12, Mn 0.33, P 1.91, Cr 1.02 (wt%)

 

Reaction

  

Processing

Sand cast

 

Applications

  

Sample preparation

Nital

 

Technique

Reflected light microscopy

 

Contributor

Dr R F Cochrane

 

Organisation

Department of Materials, University of Leeds

 

View micrograph in DoITPoMS website

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Taken on September 4, 2002