Hot-press Sintering and Properties of Al-Zn-Mg-Cu-Zr Aluminium Alloy

Using metal powder as raw material, Al-Zn-Mg-Cu-Zr aluminium alloys were prepared by hot-press sintering technology at different sintering temperatures. The density, phase, microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr aluminium alloy specimens were measured. The results show that with the increase of sintering temperature, the porosity of the aluminium alloy decreased, but density increased, and the alloy had more homogeneous microstructure and better properties. When the sintering temperature was 600 ℃, the porosity was 0.01%, the aluminium alloy was close to completely dense and had a good degree of alloying. The maximum value of the average micro-hardness and tensile strength of the Al-Zn-Mg-Cu-Zr aluminium alloy specimen hit 174 HV and 502 MPa, respectively. The aluminium alloy with a high density, uniform structure and good mechanical property can be prepared by the hot-press sintering technology.