What is the Application of Rare Earth Aluminum Alloy?>

1. The application of rare earth aluminum alloy in power industry

Because rare earth aluminum alloy has the advantages of good conductivity, large current carrying capacity, high strength, wear resistance, easy processing, and long life, it can be used to manufacture cables, overhead transmission lines, wire cores, trolley wires and thin wires for special purposes. Adding a small amount of RE in the Al-Si alloy system can improve the electrical conductivity, because silicon in the aluminum alloy is an impurity element with a high content and has a great influence on the electrical properties, and adding an appropriate amount of rare earth can improve the silicon in the alloy. The existence of morphology and distribution can effectively improve the electrical properties of aluminum; after adding a small amount of yttrium or yttrium-rich mixed rare earth to the heat-resistant aluminum alloy wire, it not only maintains good high temperature performance but also improves the electrical conductivity; rare earth can improve the aluminum alloy system High tensile strength, heat resistance and corrosion resistance, the use of rare earth aluminum alloy cables and wires can increase the span of the cable tower and prolong the service life of the cable.

2. The application of rare earth aluminum alloy in construction industry

The most widely used 6063 aluminum alloy in the construction industry, adding 0.15% to 0.25% of rare earth, can significantly improve the as-cast structure and processing structure, can improve extrusion performance, heat treatment effect, mechanical properties, corrosion resistance, surface treatment performance and hue. The study found that rare earths in 6063 aluminum alloy are mainly distributed in α-Al and phase boundaries, grain boundaries and dendrites. They are solid-dissolved in compounds or exist in the form of compounds to refine the dendrite structure and grains, so that the The size of the undissolved eutectic and the size of the dimples in the dimple area are significantly reduced, the distribution is uniform, and the density is increased, which improves the properties of the alloy to varying degrees, such as the strength of the profile is increased by more than 20%, and the elongation is increased by 50%. The corrosion rate is more than doubled, the thickness of the oxide film is increased by 5% to 8%, and the coloring performance is increased by about 3%. Therefore, RE-6063 alloy building profiles are widely used.

3. Application of rare earth aluminum alloy in daily products

Adding trace amounts of rare earth to pure aluminum and Al-Mg series aluminum alloys for daily aluminum products can significantly improve mechanical properties, deep drawing and corrosion resistance. Compared with aluminum alloy products without rare earth, the corrosion resistance of aluminum pots, aluminum pots, aluminum pans, aluminum lunch boxes, aluminum furniture brackets, aluminum bicycles and home appliance parts and other daily necessities made of Al-Mg-RE alloy is improved. More than 2 times, the weight is reduced by 10% to 15%, the yield is increased by 10% to 20%, the production cost is reduced by 10% to 15%, and it has better deep drawing and deep processing performance. At present, rare earth aluminum alloy daily necessities have been widely used, and the products have increased significantly, and they are sold well in domestic and foreign markets.

4. Application of rare earth aluminum alloy in other aspects

In the most used aluminum-silicon casting alloys, adding a few thousandths of rare earths can significantly improve the machinability of the alloys. There are many grades of products used in aircraft, ships, automobiles, diesel engines, motorcycles and Armored vehicles (pistons, gearboxes, cylinders and instrumentation components), etc. It has been found in research and application that Sc is the most effective element for optimizing the microstructure and properties of aluminum alloys. , toughness, corrosion resistance, heat resistance, etc. Sc-Al alloys have been used in high-tech industries such as aerospace, ships, high-speed trains, and light vehicles. The C557Al-Mg-Zr-Sc series scandium aluminum alloy developed by NASA has high strength and high temperature and low temperature stability and has been used in aircraft fuselage and aircraft structural parts; the 0146Al-Cu-Li-Sc series alloy developed by Russia has been Used in spacecraft cryogenic fuel storage tanks.