silicon metal manufacturers in china

Silicon metal is also called crystalline silicon or industrial silicon. Silicon metal is a product smelted from quartz and coke in an electric furnace, and the remaining components are iron, aluminum, calcium, etc. The content of its main component silicon is 98%. In recent years, silicon content of 99.99% has also been included in Silicon metal.

The classification of Silicon metal is usually based on the proportion of the three main impurities of iron, aluminum, and calcium contained in Silicon metal. According to the content of iron, calcium, and aluminum in Silicon metal, Silicon metal can be divided into different grades such as 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501, and 1101. (For example, the iron content in 553# Silicon metal is not more than 0.5%, the aluminum content is not more than 0.5%, the calcium content is not more than 0.3%, and so on)

The role of silicon in steel

1. The influence of silicon on the microstructure and heat treatment of steel

1) As an alloying element in steel, its mass fraction is generally not less than 0.4%. It exists in ferrite or austenite in the form of solid solution and can reduce the austenite phase area.

2) Increase the annealing, normalizing and quenching temperatures to improve the hardenability in hypoeutectoid steel.

3) Silicon does not form carbides and can strongly promote the graphitization of carbon. In medium-carbon steel and high-carbon steel with high silicon content, if they do not contain strong carbide-forming elements, graphitization will easily occur at a certain temperature.

4) In carburized steel, silicon can reduce the thickness of the carburized layer and the concentration of carbon.

5) Silicon has a good deoxidizing effect on molten steel.

2. The influence of silicon on the mechanical properties of steel

1) Improve the hardness and strength of ferrite and austenite, which is stronger than manganese, nickel, chromium, tungsten, aluminum, vanadium, etc.; significantly improve the elastic limit, yield strength and yield ratio of steel, and improve fatigue strength.

2) When the mass fraction of silicon exceeds 3%, the plasticity and toughness of steel are significantly reduced.

3) Forming a band-like structure in the steel, causing the transverse performance to be lower than the longitudinal performance.

4) Improve the wear resistance of steel.

3. The influence of silicon on the physics, chemistry and processing technology of steel

1) Reduce the density, thermal conductivity, electrical conductivity and temperature coefficient of resistance of steel.

2) The eddy current loss of silicon steel sheets is significantly lower than that of pure iron, the coercive force, magnetic resistance and hysteresis loss are lower, but the magnetic permeability and magnetic induction intensity are higher.

3) Improve the oxidation resistance of steel at high temperatures.

4) Deteriorating the weldability of steel.

5) Plastic processing of steel with a mass fraction of silicon exceeding 2.5% is more difficult.

4. Application of silicon in steel

1) In ordinary low alloy steel, it can increase the strength and improve local corrosion resistance. In quenched and tempered steel, it can improve the hardenability and tempering resistance. It is one of the main alloy components in the multi-element alloy structure.

2) SiMn or SiMnB steel with a silicon mass fraction of 0.5%-2.8% is widely used as high-load spring materials, and strong carbide-forming elements such as tungsten, vanadium, molybdenum, niobium, and chromium are added.

3) Silicon steel sheets are low carbon steel and ultra-low carbon steel with a silicon mass fraction of 1.0%-4.5%, used in motors and transformers.

4) In stainless steel and corrosion-resistant steel, it can be combined with molybdenum, tungsten, chromium, aluminum, titanium, nitrogen, etc. to improve corrosion resistance and high-temperature oxidation resistance. Statues made of stainless steel and corrosion-resistant steel will last as long as new.

5) Graphite steel with higher silicon content is used as cold mold material.

Our company is located in Longquan Town Development Zone, Long'an District, Anyang City, in the north of Henan Province. As the junction of Shanxi, Henan, and Hebei, our company has convenient transportation conditions.

Economically, Anyang City, China's ferroalloy distribution center, has contributed to China's steel industry, casting industry and other enterprises. Culturally, Anyang is the birthplace of the ancient Chinese characters Oracle and Zhou Yi, and is also one of the ancient capitals of China's eight dynasties.

Our company is an economic entity integrating assets, operations and production, dedicated to the research, development and production of ferroalloy charge, metallurgical refractories and other products. Our company is mainly engaged in the production and sales of: ferrosilicon, (blocks, granules, powders, balls, etc.), Ferromanganese, nodulizing agent, inoculant, carburizer, slag remover, silicon carbide, barium silicon, calcium barium silicon, calcium aluminum barium silicon, silicon carbon alloy, ferrosilicon aluminum, ferrochromium and other metallurgical materials, can be customized according to customer requirements Customized processing of products with various contents and particle sizes according to requirements;

In the development milestone of the new century, we are willing to cooperate sincerely with friends from all walks of life, in line with the principle of honesty and trustworthiness, and accepting all customers, big or small, customer-oriented, relying on technology and management, and taking integrity as the foundation to strive for mutual benefit. Win-win, seek common development, and contribute to the revitalization of the national economy.