Silicon Magnesium Alloy

Rare earth magnesium ferrosilicon alloy, also known as rare earth nodulizer, is a multi-component alloy containing rare earth elements (mainly cerium, lanthanum, etc.), magnesium, silicon and iron. It is widely used in the steel and casting industries.

Rare earth elements

mainly cerium (Ce), lanthanum (La), etc., which can desulfurize and deoxidize, remove harmful impurities in steel, and improve the purity of steel. At the same time, rare earth elements can refine grains and improve the organizational structure of steel, thereby improving the strength, toughness, wear resistance, corrosion resistance and other properties of steel. In casting, rare earth elements can also increase the roundness of graphite balls, increase the spheroidization rate, and improve the quality of castings.

Magnesium

It is a key component of the spheroidizing agent, which can crystallize graphite in cast iron into spherical shapes, significantly improving the mechanical properties of cast iron, especially toughness and ductility. In addition, magnesium also has certain deoxidation and desulfurization effects and can purify molten iron.

Silicon element

As an effective deoxidizer, it can reduce the oxygen content in molten iron and prevent defects such as pores in castings. At the same time, silicon is also an inoculant, which can promote graphitization, reduce the tendency of white spots, and improve the mechanical properties and processing performance of castings.

Iron element

As the matrix of the alloy, it carries other elements to play its role and provides the basic strength and toughness of the alloy.

1

 

Raw material preparation

Select ore containing rare earth elements, magnesium ore, ferrosilicon, etc. as the main raw materials, and carry out pretreatment, such as crushing and screening, to ensure that the size and purity of the raw materials meet the production requirements.

2

 

Smelting

Add the pretreated raw materials to an electric furnace or other melting furnace in a certain proportion for smelting. During the smelting process, it is necessary to strictly control parameters such as temperature, time and furnace atmosphere to ensure that the various elements are fully fused and meet the expected composition and performance requirements.

3

 

Refining

The smelted alloy liquid may contain some impurities and needs to be refined to further improve the quality of the alloy. Refining methods include blowing stirring, adding refining agents, etc., through which impurities such as gas and inclusions in the alloy liquid can be removed.

4

 

Casting

After the refined alloy liquid reaches the specified temperature and composition, it is poured into a specific mold for casting and molding to form a lump or granular finished product.

Ductile iron production

It is an indispensable nodularizing agent in the production of ductile iron. Adding an appropriate amount of rare earth silicon magnesium alloy before pouring the molten iron can spheroidize the graphite and greatly improve the mechanical properties of cast iron. It is widely used in the manufacture of various mechanical parts, automobile parts, pipe fittings, etc. For example, automobile engine crankshafts, wheel hubs and other components are made of ductile iron, which can reduce weight while ensuring strength, improving the performance and fuel economy of the car.

Steelmaking industry

Adding MgSiFe alloy during the steelmaking process can deoxidize, desulfurize, remove harmful impurities and refine grains, improving the quality and performance of steel. It is often used to produce special steel types such as high-strength alloy steel and stainless steel to improve the strength, toughness, fatigue resistance and corrosion resistance of steel.

Nonferrous metal casting

In some nonferrous metal castings, such as Al and Mg alloy castings, It can also be used as modifiers to improve the structure and performance of the alloy and improve the quality and performance of the castings.

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