Image icon  Fe, C 0.15 (wt%) steel, carburised

 
Use this resource: Use this resource icon
Link to this page: http://core.materials.ac.uk/search/detail.php?id=1324
Download file: http://core.materials.ac.uk/repository/doitpoms/miclib/000287.jpg
Attribution text: By DoITPoMS, Dr R F Cochrane, released under CC BY-NC-SA 2.0 license
Attribution HTML: By DoITPoMS, Dr R F Cochrane, released under <a href="http://creativecommons.org/licenses/by-nc-sa/2.0/uk/legalcode">CC BY-NC-SA 2.0</a> license via <a href="http://core.materials.ac.uk/search/detail.php?id=1324">CORE-Materials</a>
View at:        
Resource type: Image
Description: After initial casting of this steel it was subject to a process known as carburisation. The metal is heated to above the ferrite-austenite transition in a carbon atmosphere. This establishes a concentration gradient and hence carbon diffuses into the steel. Usually the steel is then hardened by quenching. This produces what is known as a case hardened steel - with a hard surface (case) surrounding a tough core. This micrograph has been taken from the bulk of the sample, showing that carbon does not diffuse significantly into the interior of a case hardened steel.
Keywords: alloy • carbon • carburisation • iron • metal • steel • displacement • indentation • Plasticine
Categories: Science approaches > Microstructure
Materials > Metals & alloys > Carbon steels
Processes > Thermal treatments > Quenching
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: DoITPoMS, University of Cambridge
Dr R F Cochrane, Department of Materials, University of Leeds
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).
Creative Commons Attribution Non-Commercial Share Alike logo
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
  • noncommercial – You may not use this work for commercial purposes.
  • share alike – If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one.
View the full legal code here.
Date created: 04 September 2002
Date added: 21 August 2009
Package: DoITPoMS Micrograph Library
Resource ID: 1324