Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
EVOLUTION OF THE AL-ZN ALLOYS MICROSTRUCTURE MANUFACTURED BY THE SQUEEZE CASTING PROCESS
Submission Author:
Fernando Araujo , PB
Co-Authors:
Diego Silva, Diego Lima, Robson Lima, Regina Bernardo , Claudio Siqueira, Fernando Araujo
Presenter: Fernando Araujo
doi://10.26678/ABCM.COBEM2017.COB17-1296
Abstract
The squeeze casting process is a casting process in which the molten metal in the liquid state is solidified under pressure into a metal mold closed by a punch. In general, components made by squeeze casting have fine granulation, excellent surface finish and almost porosity free, the same can be of different sizes and shapes, the mechanical properties are significantly increased compared to the traditional casting method and, in addition. Parts manufactured by squeeze casting possess superior weldability and are suitable for heat treatments, and finally compared to casting common parts manufactured by squeeze casting are formed in a single operation with a lower power consumption. The objective of this work is to analyze the influence of the pressure as well as the zinc content of the alloys in the secondary dendritic spacing. The Al-1% Zn, Al-3% Zn and Al-5% Zn compositions by weight were used for this purpose, solidified with the squeeze casting process using the pressures 0 MPa, 50 MPa, 100 MPa and 150 MPa, with a Pressing time of 5 seconds. It is observed that in general the increase in pressure causes a decrease in the secondary dendritic spacing up to the pressure 100MPa, from this point variations of up to 150 MPa cause increase in the secondary dendritic spacing.
Keywords
squeeze casting, Al-Zn alloys, microestruture
