The aluminum alloy damping tower is composed of, by mass, 9.8%-10.2% of Si, 0.35%-0.45% of Mg, 0.45%-0.85% of Cu, 0.25%-0.35% of Mn, 0.15%-0.2% of Ti, 0.01%-0.05% of Sr, 0.005%-0.015% of P, smaller than or equal to 0.25% of Fe and the balance Al and other inevitable impurities, the single impurity is smaller than or equal to 0.05%, and the total amount of the other impurities is smaller than or equal to 0.15%. By optimizing the composition and the vacuum die-casting process of the aluminum alloy shock absorption tower, coarse alpha-Al grains, primary crystals and eutectic Si phases are refined, the purity and die-casting fluidity of molten aluminum alloy are improved, the harm of hydrogen holes and inclusions to the strength and plasticity is eliminated, the strength and plasticity of the aluminum alloy shock absorption tower are improved, the tensile strength is larger than or equal to 320 MPa, the yield strength is larger than or equal to 260 MPa, and the service life of the aluminum alloy shock absorption tower is prolonged. The percentage elongation after fracture is not less than 10%. The aluminum alloy shock absorption tower is free of heat treatment, heat treatment deformation is avoided, and the requirements for integrated die casting and lightweight design and manufacturing of the aluminum alloy shock absorption tower are met.
本发明公开了一种高强韧铝合金减震塔及其真空压铸方法,铝合金减震塔由以下质量百分比的成分组成:Si 9.8‑10.2%,Mg0.35‑0.45%,Cu 0.45‑0.85%,Mn 0.25‑0.35%,Ti 0.15‑0.2%,Sr0.01‑0.05%,P 0.005‑0.015%,Fe≤0.25%,其余为Al和不可避免的其它杂质,其它杂质单个≤0.05%,总量≤0.15%。本发明通过优化铝合金减震塔的成分组成和真空压铸工艺,细化粗大α‑Al晶粒、初晶和共晶Si相,提高铝合金液的纯净度和压铸流动性,消除氢气孔和夹杂物对强度和塑性的危害,提高铝合金减震塔的强度和塑性,抗拉强度≥320MPa,屈服强度≥260MPa,断后伸长率≥10%。铝合金减震塔免热处理,避免热处理变形,满足铝合金减震塔一体化压铸和轻量化设计制造的需求。
High-strength and high-toughness aluminum alloy damping tower and vacuum die-casting method thereof
一种高强韧铝合金减震塔及其真空压铸方法
2024-04-02
Patent
Electronic Resource
Chinese
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