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The influence of microstructure and mechanical properties on the machinability of martensitic and bainitic prehardened mould steels

Seyyed Mohammad Hamed Hoseiny ; Berne Högman ; Hans-Olof Andrén (Institutionen för teknisk fysik, Materialens mikrostruktur ) ; Uta Klement (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Jan-Eric Ståhl ; Anders Thuvander
International Journal of Materials Research - Zeitschrift für Metallkunde (1862-5282). Vol. 104 (2013), 8, p. 748-761.
[Artikel, refereegranskad vetenskaplig]

The machinability of two prehardened mould steels, one continuously-cooled and one quenched and tempered, is compared in terms of cutting temperature, cutting force and tool life. Both materials have a hardness of ~ 40 HRC which is a typical hardness for prehardened mould steels. The results of machinability are related to mechanical properties and microstructural features, and the material removal rate is estimated for the materials. The continuously-cooled steel with bainitic structure shows higher machinability and possesses superior impact toughness and ductility compared to the quenched and tempered steel with martensitic structure. These properties are very important for plastic mould steels. The continuously-cooled bainitic steel also has the advantage of not requiring any costly quenching and tempering processes in connection with its production.

Nyckelord: machinability, microstructure, prehardened mould steel, mechanical properties



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Denna post skapades 2013-08-15. Senast ändrad 2016-11-02.
CPL Pubid: 181457

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Materialens mikrostruktur (2012-2015)
Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Ämnesområden

Materialvetenskap
Mekanisk tillverkningsteknik

Chalmers infrastruktur