Introduction to Magnesium Alloys
Magnesium alloy is an alloy composed of magnesium and other elements. Its characteristics are: low density (about 1.8g/cm3 magnesium alloy), high specific strength, large specific elastic modulus, good heat dissipation, good shock absorption, greater impact load capacity than aluminum alloy, and corrosion resistance to organic substances and alkalis good. The main alloying elements are aluminum, zinc, manganese, cerium, thorium and a small amount of zirconium or cadmium. Magnesium-aluminum alloys are currently the most widely used, followed by magnesium-manganese alloys and magnesium-zinc-zirconium alloys. Mainly used in aviation, aerospace, transportation, chemical industry, rocket and other industrial sectors. It is the lightest metal among practical metals. The specific gravity of magnesium is about 2/3 of that of aluminum and 1/4 of that of iron. It is the lightest metal among practical metals, with high strength and high rigidity.
Magnesium alloy is one of the lightest metal structural materials, with a density of only 1.3g/cm3~1.9g/cm3, which is about 2/3 of Al and 1/4 of Fe. Magnesium alloy has the advantages of high specific strength, high specific stiffness, shock absorption, electrical conductivity, thermal conductivity, electromagnetic shielding and dimensional stability, and easy recycling. Known as the most promising green material in the 21st century for its light weight and excellent comprehensive performance, it is widely used in various fields such as aerospace, automobile manufacturing, and electronic communications. However, the high chemical and electrochemical activity of magnesium alloys seriously restricts the application of magnesium alloys. The corrosion resistance of magnesium alloys can be improved by proper surface treatment.
Magnesium alloy processing
Magnesium alloy is one of the lightest metal structural materials, with a density of only 1.3g/cm3~1.9g/cm3, which is about 2/3 of Al and 1/4 of Fe. Magnesium alloy has the advantages of high specific strength, high specific stiffness, shock absorption, electrical conductivity, thermal conductivity, electromagnetic shielding and dimensional stability, and easy recycling. Known as the most promising green material in the 21st century for its light weight and excellent comprehensive performance, it is widely used in various fields such as aerospace, automobile manufacturing, and electronic communications. However, the high chemical and electrochemical activity of magnesium alloys seriously restricts the application of magnesium alloys. The corrosion resistance of magnesium alloys can be improved by proper surface treatment.
Magnesium alloy is suitable for die casting because of its good fluidity and mold filling performance, and its cost is low. At present, more than 90% of magnesium alloy parts are produced by die-casting, and some existing magnesium alloy enterprises are basically making magnesium alloy castings, but the defects in the casting state limit the application of magnesium alloy materials. Therefore, it is urgent to develop magnesium alloy deformation processing technology. In recent years, the development of profile and plate forming technology has been mainly carried out.
Cast magnesium alloy is a magnesium alloy that is formed by adding alloying elements based on magnesium and is suitable for producing parts by casting. According to the forming process, magnesium alloys can be divided into cast magnesium alloys and wrought magnesium alloys, both of which have great differences in composition, structure and performance. Cast magnesium alloys are mainly used in auto parts, parts housings and electrical components, etc.
