铸造铝合金材质机械性能取决于合金的化学成分,熔体处理、铸造方法及热处理工艺。高强度铝合金材质主要由铝、硅、铜、镁、锰、钛等元素组成,合金各组元含量不同其材质机械性能亦不同。由于本试验为多元素多水平试验,为避免试验的盲目性,我们在稳定熔体处理,经相同铸造工艺及热处理工艺条件下,通过正交试验,找出满足高强度(σ_b≥300 MPa),低延伸率(σ≤1%),硬度 HB≥110)的铝合金材质的最佳成分配比。 Cast aluminum alloy mechanical properties depend on the chemical composition of the alloy, melt processing, casting methods and heat treatment process. High-strength aluminum alloy is mainly composed of aluminum, silicon, copper, magnesium, manganese, titanium and other elements, the alloy content of different mechanical properties of its material is also different. Because this experiment is multi-element and multi-level test, in order to avoid the blindness of the experiment, under the conditions of stable melt treatment, the same casting process and heat treatment process conditions, through orthogonal test to find out to meet the high strength (σ_b ≥ 300 MPa) , Low elongation (σ ≤ 1%), hardness HB ≥ 110) the best aluminum alloy material composition ratio.