ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
The deformation process of steel in the semi-solid state, or thixoforming is an alternativesolution to the classical industrial processes that are the casting or the hot forging.Thixoformed steel parts are of better quality and may substitute advantageously parts realized incast iron leading to an improvement of the rigidity, for example, but also parts in aluminium alloysobtained by the main deformation processes: for lower volume, thixoformed steel parts, keeping thesame functionality, present superior mechanical properties than the parts realized in aluminiumalloys. The industrial development of the steel thixoforming must be accompanied by theknowledge and the various parameters control of the process: steel grades definition andelaboration, the homogeneous high-temperature heating of the slug before deformation, conceptionor re-conception of the part to adapt it to the process and the practice properties, the equipmentdefinitions which are used for the deformation operation at the semi-solid state. The handlingsystem is also important in the thixoforming process; it is going to allow the slug transfer, at thesemi-solid state, between the heating zone and the tooling or to evacuate the thixoformed parttowards the mean assuring the quality heat treatment of the part. The means choice which areindustrially going to ensure the process have a big importance to obtain successful production lineand so, a cost reduction by “finished” part competitive with regard to processes used classicallytoday. After the description of the applicable key points to the main parameters and the solutionsused to obtain a successful product: high mechanical characteristics, near net shape or net shapegeometry, no flash and limited machining operation, ... are described , The investigations finishedwith an approach comparing the part cost realised by thixoforming process with regard to classicalprocesses
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.213.pdf
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