rare earth magnesium silicon

With the development of new energy sources, wind power generation has already entered the public's field of vision, and the requirements for wind power generation equipment castings are even higher. Extremely high tensile and compressive, elongation and extremely high stiffness. In addition, due to a series of factors in the production and application of wind power generation castings, the requirements for rare earth magnesium silicon used in wind power generation castings are still relatively high. Generally, such nodulizers must meet a certain anti-spheroidization recession ability. High spheroidization rate, the above are the general essentials to be satisfied by rare earth magnesium silicon used in wind power generation equipment.

The rare earth magnesium silicon specially used for wind power equipment castings, through the application of mixed rare earth metals, the content of heavy rare earth elements can make the phosphorus and sulfur content in the rare earth magnesium silicon to be adjusted to the minimum, and also have high impact strength at low temperature. Problems with the prior art. The special rare earth magnesium silicon for wind power equipment castings is characterized in that the rare earth magnesium silicon is calculated in parts by mass, and the specific components are as follows: 42-50 parts of silicon; 5.2-6.8 parts of magnesium; 0.4-1.2 parts of aluminum; 0.8-3 parts of calcium; 15-30 parts; mixed rare earth metal 0.3-2.0 parts;Rare earth magnesium silicon is also mixed with barium-containing inoculants. The mass proportion of the inoculant is 0.2~0.3% of the iron content in the spheroidizer, and the particle size is 0.5±0.1mm. The sulfur and phosphorus content of rare earth magnesium-silicon treated ductile iron are both less than 0.04%, and the lower sulfur and phosphorus content can ensure the high impact strength of the casting at low temperature.