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CN104046871A 一种耐热镁合金及其制备方法 无效 - 驳回 复审申请

一种耐热镁合金及其制备方法
摘要：
本发明提供了一种耐热镁合金，包括：3.5wt％～4.5wt％的Al，2.5wt％～3.5wt％的La，1.5wt％～3.0wt％的Sm，0.2wt％～0.4wt％的Mn，总量小于0.03wt％的杂质元素，余量为镁。本发明提供了一种镁合金的制备方法，包括将镁源、铝源、镧源、钐源和锰源进行熔炼，得到合金液；将所述合金液进行压铸，得到耐热镁合金。本发明提供的耐热镁合金中含有稀土元素La和Sm，La和Sm抑制了Mg17Al12相的生成，而且Sm能够起到较好的固溶强化效果，因此本发明提供的耐热镁合金在高温下具有较好的力学性能和抗蠕变性能。
摘要（英）：

The invention provides a heat-resistant magnesium alloy. The magnesium alloy comprises the following components: 3.5wt%-4.5wt% of Al, 2.5wt%-3.5wt% of La, 1.5wt%-3.0wt% of Sm, 0.2wt%-0.4wt% of Mn, impurity elements of which the total amount is less than 0.03wt% and the balance of magnesium. The invention provides a preparation method of the magnesium alloy. The preparation method comprises the steps of smelting a magnesium source, an aluminum source, a lanthanum source, a samarium source and a manganese sources to obtain an alloy liquid; carrying out press casting on the alloy liquid to obtain the heat-resistant magnesium alloy. Since the heat-resistant magnesium alloy provided by the invention contains rare earth elements, namely, La and Sm, La and Sm inhibit the generation of Mg17Al12 phase, and Sm can have a better solution strengthening effect, and thus the heat-resistant magnesium alloy provided by the invention has the advantages of good mechanical properties and creep resistance at high temperature.

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