The atomized magnesium alloy powder is obtained by centrifugally atomizing the magnesium alloy ingot after being melted at a high temperature, and then rapidly cooling at a low temperature to cause the alloy droplet to condense into a spherical shape.
(1) The inert gas protection process is adopted, and the content of oxygen, nitrogen and the like in the magnesium alloy powder is low and the purity is high;
(2) using a rapid cooling process, the magnesium alloy powder has fine crystal grains;
(3) The atomization process is adopted, and the magnesium alloy powder is spherical and has good fluidity.
An alloy composed of other elements added on the basis of magnesium. Its characteristics are: low density (about 1.8g/cm3), high specific strength, large elastic modulus, good shock absorption, and the ability to withstand impact load is larger than aluminum alloy, and it has good corrosion resistance to organic matter and alkali. The main alloying elements are aluminum, zinc, manganese, cerium, lanthanum and a small amount of zirconium or cadmium. Currently the most widely used is magnesium-aluminum alloy, followed by magnesium-manganese alloy and magnesium-zinc-zirconium alloy. Mainly used in aviation, aerospace, transportation, chemical, rocket and other industrial sectors. According to the molding method, it is divided into two types: wrought magnesium alloy and cast magnesium alloy. Characteristics of magnesium alloy: It is the lightest metal in practical metals. The specific gravity of magnesium is about 2/3 of that of aluminum, which is 1/4 of iron. It is the lightest metal in practical metals, high strength and high rigidity. Applications: Magnesium alloys are widely used in portable equipment and automotive industries to achieve lightweighting. Although the specific gravity of magnesium alloy is heavier than plastic, the strength and modulus of elasticity per unit weight are higher than that of plastic. Therefore, in the case of the same strength parts, the parts of magnesium alloy can be made thinner and lighter than plastic. In addition, since the specific strength of the magnesium alloy is higher than that of the aluminum alloy and the iron, the weight of the aluminum or iron component can be reduced without reducing the strength of the component. Applications: Cell phone phones, LCD screens on laptops have grown in size year by year, using magnesium alloys on their frame and back casing.
Heat transfer: Although the thermal conductivity of magnesium alloy is not as good as that of aluminum alloy, it is several times higher than that of plastic. Therefore, magnesium alloy is used in electrical products to effectively dissipate internal heat to the outside.
A magnesium alloy is used on the casing and shielding material of the mobile phone.
Magnesium alloys have lower cutting resistance than other metals and can be processed at a faster speed during machining.
Good resistance to depression
Compared with other metals, magnesium alloys have large deformation resistance, and the depression caused by collision is smaller than other metals.
Absorption of vibration and shock: Since the magnesium alloy has good absorption performance for vibration energy, vibration is reduced by using components for driving and transmission. In addition, a magnesium alloy having a good impact energy absorption performance and a higher elongation than an aluminum alloy can absorb impact energy without being broken after being impacted.
Application range: Magnesium alloy is used on parts near the vibration source of a hard disk drive reading device or the like. If magnesium alloy is used on the fan blades, the vibration can be reduced to a low level. In addition, in order to increase the impact absorption and weight reduction after the automobile is impacted, a magnesium alloy is used on the steering wheel and the seat.
Magnesium creeps less in size over time and temperature. Regeneration: Magnesium alloys, unlike plastics, can be easily regenerated without sacrificing their mechanical properties, and plastics are difficult to regenerate without degrading their mechanical properties. Compared with other metals, magnesium alloys have a lower melting point and a lower specific heat, and the energy consumed in regenerative melting is 4% of the energy consumed in the manufacture of new materials. Magnesium alloys have the highest relative strength (ratio of strength to mass). Specific stiffness (ratio of stiffness to mass) is close to that of aluminum alloy and steel, much higher than engineering plastics.