High-strength and high-temperature-resistant magnesium alloy

Abstract

The invention discloses a high-strength and high-temperature-resistant magnesium alloy, and belongs to the field of metallic materials. The magnesium alloy mainly comprises elements of magnesium, aluminum, zinc, manganese, erbium, yttrium, zirconium and the like, the magnesium alloy is composed, by weight percentage, of 1-2% of the aluminum, 2-3% of the zinc, 0.5-1% of the manganese, 2-3.5% of the erbium, 1.5-2% of the yttrium, 0.02-0.05% of the zirconium, less than 0.02% of silicon, less than 0.002% of copper, less than 0.002% of iron, less than 0.005% of other impurities and the balance magnesium. According to high-strength and high-temperature-resistant magnesium alloy, the elements such as the magnesium, the aluminum, the zinc, the manganese, the erbium, the yttrium and the zirconium are added into the magnesium alloy, room-temperature strength and corrosion resistance of materials are improved, tensile strength, elongation and high-temperature strength of the magnesium alloy are greatly improved, and the magnesium alloy can work under the temperature ranging from 200 DEG C to 300 EDG C for a long time.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a high-strength and high-temperature-resistant magnesium alloy. Background technique [0002] Magnesium alloy is the fastest-growing light alloy in the world today. Magnesium alloy has low density, high specific strength and specific stiffness, good electrical and thermal conductivity, good damping and shock absorption and electromagnetic shielding performance, good machinability and easy die-casting, especially easy to recycle and reuse. With the increasing demand for quality, magnesium alloys, which are lighter than aluminum alloys, have attracted widespread attention at home and abroad. Magnesium alloys are the lightest among practical metals, and are gradually being used not only as materials for aircraft, but also as materials for automobiles. [0003] At present, the use of magnesium alloys is far less than that of aluminum alloys. One of the reasons is that its...

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Problems solved by technology

[0003] At present, the use of magnesium alloys is far less than that of aluminum alloys. One of the reasons is that its heat resistance and corrosion resistance are poor. When the ambient temperature exceeds 120 ° C, the strength of general magnesium alloys drops suddenly. Low, and the oxide film formed on the surface of the electrode is not dense, so that the magnesium alloy will cause severe corrosion in the media such as moisture, seawater, inorganic acid and its salt, organic acid, etc., thus limiting its application in equipment and products in many industries application

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