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采用挤压铸造方法研究了压力对Al－Mg合金组织和性能的影响，确定了获得合格铸件所需的最小压力。结果表明：随着压力的升高，Al－6％Mg合金的机械性能提高。对Al-6％Mg合金，其最低压力值应大于85MPa，才能获得组织致密的铸件；压力可提高β（Al3Mg2）相在α（Al）中的溶解度；在一定压力条件下，随着Mg含量的提高，挤压铸造Al－Mg合金的强度升高而延伸率下降。
The effect of pressure on microstructure and properties of Al-Mg alloy was studied by squeeze casting method, and the minimum pressure required to obtain qualified castings was determined. The results show that the mechanical properties of Al-6% Mg alloy increase with the increase of pressure. For Al-6% Mg alloy, the minimum pressure value should be greater than 85MPa, to obtain dense castings; pressure can improve the solubility of β (Al3Mg2) phase in α (Al); under certain pressure conditions, The strength of squeeze cast Al-Mg alloy increases and the elongation decreases.