The performance advantage of magnesium alloy

The performance advantage of magnesium alloy

Magnesium has a low density and is easy to burn due to its physical and chemical properties. At 20℃, the density of magnesium metal is 1.738g/cm3, and the density of liquid magnesium metal is 1.58g/cm3; At standard atmospheric pressure, magnesium metal melting point is (650±1)℃, boiling point is 1090℃. When heated in air, magnesium metal begins to burn at 632℃ ~ 635℃. Therefore, the preparation of magnesium and the process of alloy smelting are complicated. The purity of industrial magnesium can reach 99.9%, but pure magnesium can not be used as a structural material, adding aluminum and zinc in pure magnesium

Magnesium alloys formed by lithium, manganese, zirconium and rare earth elements have high strength and can be widely used as structural materials

(1) The weight of light magnesium alloy is the lightest among all structural alloys. Its weight is 68% of aluminum alloy, 27% of zinc alloy and 23% of steel. In addition to making shells and internal structural parts of 3C products, it is also an excellent material for automobile and airplane parts.

(2) The specific strength and specific stiffness of magnesium alloy is significantly higher than that of aluminum alloy and steel, and the specific stiffness is similar to that of aluminum alloy and steel, but much higher than that of engineering plastics, which is 10 times that of general plastics.

(3) Good vibration resistance under the same load, vibration absorption is 100 times of aluminum, titanium alloy 300 ~ 500 times.

(4) Good electromagnetic shielding the case of 3C products (mobile phones and computers) should be able to provide superior anti-electromagnetic protection, while the magnesium alloy case can fully absorb the electromagnetic interference with a frequency of more than 100dB.

(5) good heat dissipation of general metal heat conductivity is hundreds of times that of plastic, magnesium alloy heat conductivity is slightly lower than aluminum alloy and copper alloy, much higher than titanium alloy, specific heat is close to water, is commonly used in the highest alloy.

(6) Good texture The appearance and touch of magnesium alloy is excellent, making the product more luxurious.

(7) Good recoverability as long as the cost is 4% of the new material price, magnesium alloy products and waste can be recycled.

(8) Stable resource Supply Magnesium is the eighth largest resource in the earth's crust, and most of its raw material is extracted from seawater, so it has a stable and sufficient resource.