As an important metal material, magnesium alloy plays a key role in many fields. The following is an introduction for you:
Ingredients and classification
Magnesium alloys are mainly composed of magnesium as the matrix, with a small amount of one or several other elements added. Common alloying elements include aluminum, zinc, manganese, silicon, rare earth elements, etc. The addition of these elements can significantly improve the mechanical properties, corrosion resistance, heat resistance, etc. of magnesium alloys.
According to the forming process, magnesium alloys can be divided into deformed magnesium alloys and cast magnesium alloys. Deformed magnesium alloys are formed by pressure processing methods such as rolling, extrusion, forging, etc., and have high strength and good plasticity; cast magnesium alloys are made into various complex-shaped parts through casting processes and have good casting properties.
Performance characteristics
Physical properties: In addition to the previously mentioned characteristics of low density, high specific strength and specific stiffness, good shock absorption, and good electromagnetic shielding, magnesium alloys also have good thermal and electrical conductivity. Its high thermal conductivity allows it to quickly conduct heat, which is beneficial for heat dissipation in electronic equipment, etc. Its electrical conductivity is also relatively good, and it can be used in some occasions that require electrical conductivity.
Chemical properties: Magnesium alloys have relatively active chemical properties and easily react with oxygen in the air to form an oxide film on the surface. However, the protective effect of this oxide film is relatively weak. Therefore, magnesium alloys usually require surface treatment, such as chemical conversion treatment, anodizing, electroplating, etc., to improve their corrosion resistance.
Mechanical properties: Through reasonable alloying and heat treatment processes, magnesium alloys can obtain higher strength, hardness and good toughness. At the same time, magnesium alloys also have good fatigue performance and impact resistance, and can work stably for a long time under complex stress conditions.