Ferrite (structural component)

ferritic structure

The single-phase structural component ferrite , which consists of the ferritic phase of iron , forms a polyhedral , twin-free structure, to which the following properties are ascribed:

• Ferrite is very soft with a hardness of around 60 HV
• it is easily deformable, the ductility parameters at break elongation A and necking Z are A = 50% and Z = 80%
• the thermal expansion is low
• the ferritic structural component is susceptible to corrosion

Ferritic steels , for example , but also ferritic castings , which are characterized by the properties mentioned above, have a partially ferritic structure .

Machinability

See also : Machinability of steel

The resulting cutting forces and wear are low. The problem is the high deformability. This leads to long ribbon and tangled chips that can get caught in the machine and to the formation of burrs and thus poor surface quality. In addition, materials with a ferritic structure tend to stick to the cutting edge at low cutting speeds, which leads to the undesirable effect of the built- up edge .

See also

• Austenite (structural component)
• Martensite
• Bainite
• Perlite
• Ledeburit
• Cementite

Individual evidence

1. ↑ Bargel / Schulze (ed.): Material Science Springer, Berlin-Heidelberg 2008, ISBN 978-3816918394
2. ↑ Weißbach: Material Science. Structures, properties, testing. Vieweg + Teubner, Wiesbaden 2010, ISBN 978-3834815873
3. ↑ Herbert Schönherr: Machining Technology , Oldenbourg, 2002, p 60th
4. ↑ Fritz Klocke , Wilfried König: Production Process Volume 1: Turning, Milling, Drilling , Springer, 8th Edition, 2008, p. 274.