[Technology] Overview of Cast Magnesium Alloys
In 1808, researchers used the electrolysis process to ionize pure magnesium from magnesium sulfate for the first time. In 1886, magnesium metal was formally put into industrial production. After 40 years (FP 1928), the world's annual output of magnesium metal is about 1000t, and since then, the annual output of magnesium and magnesium alloys has been rising. Because magnesium alloy has high specific strength and specific rigidity, it has good impact resistance and shock absorption and resistance. EMI electromagnetic wave, high dimensional stability, high creep resistance, and rapid cutting processing, etc., and is one of the lightest metals in industrial materials. Most magnesium alloys can be welded, especially Convenient nitrogen arc welding can achieve high welding quality, so magnesium alloy materials are widely used in aerospace, automotive and motorcycle industries and electronics industries, etc. The magnesium alloy foundry industry is entering a golden era of rapid development.
Compared with the content of other metal elements in the Earth's crust, magnesium content in the earth's crust is only behind aluminum and iron, ranking third, accounting for about 2.7% of the earth's crust quality. At the same time, the ocean that accounts for 70% of the earth's surface area is also a treasure house of natural magnesium resources. According to the budget, each cubic meter of seawater contains about 1.3kg of magnesium, and only magnesium in the Dead Sea can be used for human development if it is fully developed. Used 22000.
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