Alloy spheroidizers are mainly used in cast iron (especially ductile iron) production. By adding specific elements to molten iron, graphite is promoted to precipitate in the form of spheres, thereby improving the mechanical properties of cast iron. The following are common types of alloy spheroidizers and their characteristics:
Pure magnesium: It needs to be processed by pressure-added magnesium process (such as cored wire method and bell-shaped pressing method), but the reaction is violent and safety measures are required.
Magnesium alloy (commonly used):
Mg-Fe-Si (such as Mg5~30%, Si35~50%): the most common, such as Mg8RE5 (containing 8% magnesium and 5% rare earth).
Mg-Ni: Nickel slows down the volatilization of magnesium and is suitable for high-temperature molten iron.
Mg-Ca: Calcium can increase the absorption rate of magnesium and reduce the amount of slag.
Rare earth silicon iron magnesium alloy (such as Mg4~10%, RE1~10%): Rare earth (cerium, lanthanum, etc.) can neutralize interfering elements (such as sulfur, titanium), suitable for high-sulfur molten iron or thin-walled castings.
Pure rare earth alloy (such as Fe-Si-RE): used for composite spheroidization or used with magnesium.
Ca-Si: Calcium has weak spheroidization ability and is often used in combination with magnesium and rare earth to improve the desulfurization effect.
Mg-RE-Ca: It combines the strong spheroidization ability of magnesium, the anti-interference of rare earth and the stabilizing effect of calcium, and has strong adaptability.
Mg-Ce-Si: Suitable for low-temperature molten iron or special performance requirements.
Yttrium-based spheroidizer (such as Y-Mg): Strong anti-fading ability, suitable for large or thick-walled castings.
Low magnesium nodulizer (such as Mg1~3%): used for compacted graphite cast iron or to reduce shrinkage defects.
Henan Tiesheng Alloy New Materials Co., Ltd. is a professional manufacturer and supplier of alloy products such as inoculants, carburizing agents, alloy cored wires, silicon carbide, silicon-carbon alloys, and slag removers. With nearly two decades of experience in the production and sales of ferroalloys, the company’s products are sold worldwide. Our partners include major steel manufacturers and others. Our products have passed the ISO quality system certification. If you have any product needs, please contact Henan Tiesheng Alloy New Materials Co., Ltd.
