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发明公开
CN105970037A 人行天桥用铝合金及其制备方法 有权 质押

人行天桥用铝合金及其制备方法
摘要：
本发明涉及一种人行天桥用铝合金及其制备方法,其特征在于，其化学组分按质量百分比为：Mg:0.55‑1.0％、Si:0.55‑0.8％、Mn:0.18‑0.55％、Cr:0.1‑0.2％、Ta:0.05‑0.2％、Ni:0.10‑0.3％、V:0.10‑0.50％、Cu:0.1‑0.3％、Zn≤0.05％、Fe≤0.20％、Ti≤0.05％，其它杂质元素单个含量≤0.05％，其它杂质元素总含量≤0.15％，余量为Al；该铝合金的制备方法是经熔炼、精炼、铸造和均匀化得到。本发明通过优化合金成分进行调整，添加微量Ta、Ni和V元素，能显著提高铝合金的强度、韧性、抗疲劳、耐腐蚀性能以及加工性能。
摘要（英）：

The invention relates to an aluminum alloy for pedestrian bridges and a preparation method thereof. The invention is characterized in that the aluminum alloy is composed of the following chemical components in percentage by mass: 0.55-1.0% of Mg, 0.55-0.8% of Si, 0.18-0.55% of Mn, 0.1-0.2% of Cr, 0.05-0.2% of Ta, 0.10-0.3% of Ni, 0.10-0.50% of V, 0.1-0.3% of Cu, at most 0.05% of Zn, at most 0.20% of Fe, at most 0.05% of Ti, at most 0.15% of other impurity elements (at most 0.05% of each of other impurity elements), and the balance of Al. The preparation method comprises the following steps: smelting, refining, casting and uniformizing. By optimizing the alloy composition, trace amounts of Ta, Ni and V are added to obviously enhance the strength, toughness, fatigue resistance, corrosion resistance and processability of the aluminum alloy.

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