Rare earth magnesium silicon alloy is a multi-element alloy containing rare earth elements, silicon elements and magnesium elements. It has important applications in casting and other fields. The main components and functions are as follows:

Element	Rare earth elements	Silicon element	Magnesium element
Function	usually contain cerium (Ce), lanthanum (La), etc. Rare earth elements have strong chemical activity and can play a role in deoxidation and desulfurization in alloys, remove harmful impurities in molten iron, and improve the purity of molten iron. At the same time, rare earth elements can also refine grains, change the morphology and distribution of graphite, and make graphite spheroidized or vermiformed, thereby significantly improving the mechanical properties of cast iron.	It is an important component of the alloy. Silicon can promote graphitization, reduce the tendency of white cast iron, improve the fluidity of cast iron, and enable the molten iron to better fill the mold cavity in the casting mold. In addition, silicon can also improve the strength and hardness of cast iron and enhance its wear resistance.	It is a key component of the spheroidizer. In the process of casting iron, magnesium reacts with sulfur, oxygen and other elements in the molten iron to form stable compounds, thereby reducing the sulfur and oxygen content in the molten iron. More importantly, magnesium can make graphite crystallize into spheres, greatly improving the mechanical properties of cast iron, especially toughness and ductility.

Rare Earth Magnesium Silicon Alloy

chemical composition

Grade	Composition(%)
	Mg	Re	Si	Ca	Mn	Al	Ti	Fe
	Mg	Re	Si	Ca	S			Fe
QRMg7HRE2	6.0-<8.0	1.5-<2.5	35.0-44.0	≤4.0	4.0	0.5	0.5	residual
QRMg8HRE3	7.0-<9.0	2.5-<4.0	35.0-44.0	2.5-3.5	4.0	0.5	1.0	residual
QRMg8HRE5	7.0-<9.0	4.0-<6.0	35.0-44.0	≤4.0	4.0	0.5	1.0	residual
QRMg8HRE7	7.0-<9.0	6.0-<8.0	35.0-44.0	≤4.0	4.0	0.5	1.0	residual
QRMg10HRE7	9.0-<11.0	6.0-<8.0	35.0-44.0	s4.0	4.0	0.5	1.0	residual

Products uses

Ductile iron production:

It is an indispensable spheroidizer and inoculant in ductile iron production. In the production process of ductile iron, the addition of RE FeSiMg alloy can spheroidize graphite, significantly improve the strength, toughness and wear resistance of cast iron, and is widely used in the manufacture of automotive parts, mechanical parts, pipe fittings, etc. For example, important parts such as crankshafts and gears of automobiles are often made of ductile iron, and rare earth silicon-magnesium alloy plays a key role in it.

Vermicular cast iron production:

In the production of vermicular cast iron, rare earth silicon magnesium alloy can make graphite worm-like, so that cast iron has good comprehensive properties, such as higher strength, good thermal conductivity and thermal fatigue resistance, etc., and is often used in the manufacture of engine cylinders, brake discs, etc.

Other fields:

In some special casting processes and alloy materials, rare earth ferro silicon magnesium alloy can also be used as an additive to improve the performance of the material and meet different industrial needs.

Rare Earth Magnesium Silicon Alloy

Core Advantages

Stable Spheroidization:

Compared to traditional "pure magnesium spheroidizers" (which are prone to magnesium burnout and experience large fluctuations in spheroidization), rare earth elements inhibit high-temperature oxidation of magnesium, maintaining a stable spheroidization rate above 90% (graphite spheroidization reaches Grade 1-2 in GB/T 9441-2020).

Multifunctional Integration:

Simultaneously achieves the three functions of "spheroidization + inoculation + purification," eliminating the need for multiple additives, simplifying the casting process and reducing production costs.

Wide Compatibility:

Suitable for various smelting equipment, including cupolas and medium-frequency induction furnaces, and compatible with a variety of cast iron materials, including gray cast iron, ductile iron, and malleable iron, to meet diverse performance requirements.

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Rare Earth Magnesium Silicon Alloy

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