ISSN:
1662-9779
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Physik
Notizen:
An improved and self-developed semisolid preparing and rheomoulding device —rotating barrel rheomoulding machine (RBRM) for light alloys in laboratory is introduced in thispaper. It mainly consists of a melting furnace, a shearing system with two relative-rotating conicalbarrels, a central temperature control unit, gas protection system and a die-casting system.Microstructure-processing relationship of A357 aluminum alloy obtained by the RBRM process isinvestigated by different intensity of turbulence and different shear rate. The experimental resultsshow that the improved RBRM is capable of eliminating coarse dendrites, and producing small andspherical solid particles uniformly distributed in a eutectic matrix. In addition, the process caneliminate entrapped gas and reduce fine shrinkage pores in the specimens as well. Compared withthe original self-developed device in our laboratory, the improved equipment has the followingadvantages: accurate control of stirring temperature; small volume and convenient manipulation;fine and spherical solid particles, chemical and microstructural uniformity throughout the specimensand so on
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.157.pdf
