Image icon  Blackheart cast iron

 
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Description: Blackheart cast iron is produced by heating white cast iron at 900-950 °C for many days before cooling slowly. This results in a microstructure containing irregular though equiaxed nodules of graphite in a ferritic matrix. The term "blackheart" comes from the fact that the fracture surface has a grey or black appearance due to the presence of graphite at the surface. The purpose of the heat treatment is to increase the ductility of the cast iron.
Keywords: alloy • carbon • iron • metal • white cast iron
Categories: Science approaches > Deformation & failure > Fracture
Science approaches > Microstructure
Materials > Metals & alloys > Cast irons
Processes > Shaping > Casting
Processes > Thermal treatments
Properties > Mechanical & thermal > Ductility
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: Dr R F Cochrane, Department of Materials, University of Leeds
DoITPoMS, University of Cambridge
Published by: DoITPoMS, University of Cambridge
License: This resource is released under the Creative Commons Attribution Non-Commercial Share Alike license (2.0 UK: England & Wales).
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Date created: 04 September 2002
Date added: 21 August 2009
Package:
Resource ID: 1406