ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Steel thixoforging process combines the advantages of performing parts having highlycomplex shapes and good mechanical properties. These advantages result from the shear thinningflow behaviour of semi-solids due to microstructure changes during the material deformation. Manyparameters such as steel grade, raw speed, slug temperature, tool temperature influence the steelthixoforging process. In this work, we are interested in analysing the influence of thermalconditions as well as ram speed on the flow behaviour and the microstructure of the final parts. Todo so, thixo-extrusion tests on a high speed hydraulic press were performed on C38 steels usingdifferent ram speeds and different temperatures for the tools. The temperature is measured in the dieclose to the tool-material interface during the whole process. Correlations between the temperaturemeasurements, the flow profile and the microstructure are discussed. Using the Finite Element codeForge2005, these thixo-extrusion tests are simulated. Using an inverse method, some parametersused in the thermal exchange modelling are identified by successive comparisons betweencalculated and measured temperatures within the die
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.701.pdf
