Graphite materials have high heat resistance and can maintain stable physical and chemical properties at extreme temperatures. They can still work normally in high temperature environments, especially in high temperature industries such as metallurgy and glass manufacturing. Compared with ordinary metal materials, graphite materials can withstand higher temperatures without deformation or performance degradation, greatly improving the service life and reliability of equipment.
So how to judge whether the quality of graphite rotor and shaft products is good?
First of all, we need to look at the purity and uniformity of the material. The material purity of the rotor and shaft is the key factor affecting its performance. High-purity graphite materials can reduce the contamination of impurities to aluminum liquid and ensure the quality of aluminum alloy. High-quality graphite materials have high carbon content, low ash content, low sulfur and low phosphorus, so the uniform structure of graphite materials is very important. The uniform structure can ensure the stability and wear resistance of the rotor and shaft at high temperatures and extend the service life.
Then look at the mechanical properties of the product. The strength of the graphite material must meet the use requirements, especially the compressive strength and bending strength, which are related to the damage resistance of the rotor and shaft under high temperature and high-speed rotation. Secondly, the hardness of the product should be high. The hardness can improve the wear resistance of the graphite rotor and shaft, reduce wear during use, and extend the service life of the product.
A good product should also have good impact resistance and be able to withstand violent stirring in aluminum liquid and thermal shock at high temperature.
The dimensional accuracy of graphite products will more directly affect its installation and use effect. High-precision processing can ensure the good cooperation of the rotor and shaft with the equipment, reduce errors and friction during assembly, and improve the use efficiency. Dimensional stability is also very important. The product will not undergo significant thermal expansion or contraction at high temperatures to ensure the stability of the product's dimensions during use.
Surface quality is also an important indicator for judging product quality. The surface of a high-quality product should be smooth and free of obvious defects, such as cracks, pores, burrs, etc. The smooth surface can reduce the friction resistance between the rotor and the aluminum liquid, reduce energy consumption, and also reduce the accumulation of impurities in the aluminum liquid, further improving the purification effect of the aluminum liquid.
Because aluminum liquid contains fluoride and other corrosive substances, graphite rotors and shafts need to have good corrosion resistance. High-quality graphite materials should have strong antioxidant ability and be able to work for a long time at high temperature without being corroded. Improving corrosion resistance can not only extend the service life of graphite rotors, but also reduce the replacement frequency and improve production efficiency.
The service life of graphite rotors is the core indicator that can best judge its quality. The longer the service life, the better the overall performance of the product, which can be evaluated through indicators such as wear and tear in actual use and durability time.
