ISSN:
1662-9779
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Physik
Notizen:
In the present paper, the precision forging of an impeller was studied by means ofnumerical simulation and test forming. Based on the structure and dimension of the impeller, thecombination structure was used in the forging die to obtain the extrusion deformation. The formingprocesses were simulated with DEFORM-3D for different billet dimensions and processingparameters. The parameters, which could ensure the forming quality of the impeller, were determinedby the calculations and analysis. The die structure and the billet dimensions were determinedaccording to the simulation results, and the forging die was designed and manufactured. The billetwith semi-solid microstructure was produced by means of the direct heating-isothermal treatment.The forming was conduced in an YX-315F hydraulic press, and the precision forgings of the impellerwere produced successfully. Both of the simulation and the forming test show that the impellerforging can be formed with the combination structure die and the extruding forming stalesatisfactorily. The ideal parameters to produce the precision forgings of the impeller are: billettemperature at 625ºC, die temperature at 450ºC and punch speed at 20mm/s. Under these conditions,forgings of the impeller can be produced with plump blades, smooth outer surface, and good flowline. This can match the requirements of the precision forging of impellers
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.593.pdf
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