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Heat treatment and impact toughness properties of AlMgSi foundry alloys

机译：AlMgSi铸造合金的热处理和冲击韧性

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An investigation of the effect of variations in chemical composi-tion and heat treatment of AlMgSi foundry alloys was carried out. Material prepared by unidirec-tional gravity casting was ma-chined to CharpyV specimens and subjected to micro structural investigations, hardness testing and impact toughness testing. The alloys were studied in as cast condition, directly aged at 150℃, T4 temper obtained by solution heat treat the material at 540℃-560℃ and T6 temper obtained by solution heat treatment and sub-sequently aging at 150℃.The Vickers hardness varied only slightly with Variation in chemical composition (Mn, Mg and Si). However, somewhat higher hardness was obtained for the alloy with high Si content when it was solution heat treated and aged at 150℃. The toughness was signisscantly reduced for material having a high volume of intermetallic particles, but only slightly affected by heat treatment.
机译：研究了AlMgSi铸造合金的化学成分和热处理变化的影响。通过单向重力铸造制备的材料被机械加工成CharpyV试样，并进行了微观结构研究，硬度测试和冲击韧性测试。在铸造条件下对合金进行了研究，直接在150°C时效下，通过在540°C-560°C下对材料进行固溶热处理获得T4回火，并通过固溶热处理后在150°C进行时效进行T6回火。随化学成分（Mn，Mg和Si）变化而变化很小。但是，固溶热处理并在150℃时效处理后，Si含量高的合金获得了更高的硬度。对于具有大量金属间颗粒的材料，其韧性显着降低，但受热处理的影响很小。

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