Article (Scientific journals)
Steel grades adapted to the thixoforging process : metallurgical structures and mechanical properties
Robelet, Marc; Rassili, Ahmed; Fischer, Dirk
2006In Solid State Phenomena, 116-117, p. 712-716
Peer reviewed
 

Files


Full Text
SSP.116-117.712.pdf
Publisher postprint (1.63 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
steels; thixoforging; primary and secondary microstructures; mechanical properties
Abstract :
[en] Thixoforming of steel offers the advantages of casting technology in combination with high mechanical strength that can only be achieved by forging. The progress in establishing this technology in industry depends on the success in the development of suitable steel grades. Recent investigations dealt-with the development of steel grades that are especially adapted to the thixoforming process. For this, alloys were developed with a lower solidus temperature and a wider process temperature range compared to classic forging steels. In consequence, the inductive heating process is more tolerant to inaccuracies and for a given liquid fraction the process temperature window is easier to handle. It is desired to obtain great degrees of deformation at rather low forming forces as these parameters determine the size of the needed presses. This behaviour is affected by the present liquid fraction in the slug and the heat transfer between work piece and die. It was detected that variations of the forming force have a direct influence on the quality of the thixoformed parts. In order to make the thixoforming technology of steels competitive versus other forming technologies, the parts must show a favourable microstructure and thus, good in-use properties. In this paper various solutions are compared. The main results obtained in the optimization research, namely, the steel grades adapted to semi-solid forming, the resulting process parameters and the mechanical properties of thixoforming parts will be presented for two exemplary steel grades. By producing a real automotive part, thixoforging of steels with regard to the adapted materials and to the ongoing industrial implementation of this process is proved.
Disciplines :
Materials science & engineering
Author, co-author :
Robelet, Marc
Rassili, Ahmed ;  Université de Liège - ULiège > Science des matériaux métalliques
Fischer, Dirk
Language :
English
Title :
Steel grades adapted to the thixoforging process : metallurgical structures and mechanical properties
Publication date :
2006
Journal title :
Solid State Phenomena
ISSN :
1012-0394
eISSN :
1662-9779
Publisher :
Trans Tech Publications Ltd, Stafa-Zurich, Switzerland
Special issue title :
Semi-Solid Processing of Alloys and Composites
Volume :
116-117
Pages :
712-716
Peer reviewed :
Peer reviewed
Available on ORBi :
since 07 December 2009

Statistics


Number of views
66 (0 by ULiège)
Number of downloads
0 (0 by ULiège)

Scopus citations®
 
20
Scopus citations®
without self-citations
13
OpenCitations
 
13

Bibliography


Similar publications



Contact ORBi