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A PROCESS FOR PREPARATION OF ALUMINIUM-ZINC-MAGNESIUM-COPPER-ZIRCONIUM-SILVER ALLOY HAVING IMPROVED WELDABILITY
A PROCESS FOR PREPARATION OF ALUMINIUM-ZINC-MAGNESIUM-COPPER-ZIRCONIUM-SILVER ALLOY HAVING IMPROVED WELDABILITY
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机译：具有改善的可焊性的铝-锌-镁-铜-锆-银-银合金的制备方法
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摘要
This invention relates to a process for preparation of Aluminium-Zinc-Magnesium-Copper-Zirconium-Silver (Al-Zn-Mg-Cu-Zr-Ag) alloy with improved weldability comprising the steps of preparing a charge mixture of high purity primary aluminium comprising 77.7% by weight of said high purity primary aluminium, 6% by weight of Al-30 wt% of Cu master alloy and 4.1% by weight of Al-9.8 wt% Ag master alloy; melting at 720 to 730°C the said charge mixture of primary aluminium, Al-30wt%, Cu master alloy and Al-9.8wt% Ag master alloy, adding to this molten charge 8.4% by weight elemental pure Zn, followed by raising the temperature of the molten charge as herein described; adding 3.1% by wt of Al-51wt% Mg master alloy, 0.7% by wt of Mg-28wt% Zr master alloy in the above sequential order to the said molten charge followed by super heating at 755 to 765 °C for a period of about 10 minutes; adding 0.1 kg by wt of nucleant pellets at reduced temperature of 735-745 °C for grain refinement; degassing the molten melt to remove dissolved gases and pouring the molten melt under inert gas atmosphere, preferably argon atmosphere, into a pre-heated mould; homogenizing, scalping and rolling as herein described the sound billets into sheets; solution treating, quenching and stretching the alloy sheets followed by two-step artificial aging.
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机译：本发明涉及具有改善的可焊性的铝-锌-镁-铜-锆-银（Al-Zn-Mg-Cu-Zr-Ag）合金的制备方法，该方法包括制备高纯度原铝的进料混合物的步骤。包括按重量计77.7％的所述高纯度原生铝，按重量计6％的Al-30wt％的Cu中间合金和按重量计4.1％的Al-9.8wt％的Ag中间合金;在720至730℃下熔化所述初级铝，Al-30wt％，Cu中间合金和Al-9.8wt％Ag中间合金的进料混合物，向该熔融进料中添加8.4重量％的元素纯Zn，然后升高如本文所述的熔融装料的温度;以上述顺序将3.1重量％的Al-51wt％的Mg中间合金，0.7重量％的Mg-28wt％的Zr中间合金添加到所述熔融进料中，随后在755-765℃下过热加热一段时间。大约10分钟;在735-745°C的降低的温度下添加0.1 kg wt的nucleant颗粒以细化晶粒;将熔融的熔体脱气以除去溶解的气体，并且在惰性气体气氛，优选氩气气氛下将熔融的熔体倒入预热的模具中;如本文所述，将均质坯均质化，剥皮和轧制成薄片;固溶处理，淬火和拉伸合金板，然后分两步进行人工时效。
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