The paper present the examination results concerning mechanical
properties of castings made of AlSi7MG alloy in correlation both with
the most significant squeeze casting parameters and with the modification
treatment. Experiments were planned and held according to the
2
3
factorial design. The regression equations describing the influence of the
squeeze pressure, the mould temperature, and the quantity
of strontium modifier on the strength and elongation of the examined alloy
were obtained. It was found that the main factor controlling
the strength increase is the squeeze pressure, while the plasticity (A5
) of the alloy is affected most advantageously by modification.
The application of modification treatment in squeeze casting technology
enables for production of the slab-type castings made of AlSi7Mg
alloy exhibiting strength at the level of 230 MPa and elongation exceeding
14%.