Silicon barium is a kind of ferroalloy material, also has a strong deoxidation effect, plays a very important role in the steelmaking industry, can smelt high-quality steel, although silicon barium also with its own advantages, won the recognition of many users, is widely used in the production of various steel, but we also just know that silicon barium has a certain deoxidation effect, It can improve the quality of steel by purifying liquid steel, but the more specific information is not too well understood. In view of this situation, I will briefly tell you about the role of silicon barium in the steelmaking industry.
Casting nodulator Casting nodulator
The barium in barium silicon can effectively reduce the vapor pressure of calcium and increase the solubility of calcium in liquid steel within the range of steelmaking temperature. Compared with calcium silicon alloy, the calcium content in liquid steel is about twice that of calcium silicon alloy when the amount of calcium added is half of the amount of calcium silicon alloy. Calcium is also well upgraded in liquid steel, fully showing that barium effectively protects calcium in liquid steel and reduces the oxidation of calcium, so as to achieve the purpose of calcium treatment in liquid steel.
The deoxidation effect of silica-barium can decrease the area distribution of inclusions, and the inclusions grow and float faster than that of aluminum deoxidation. The amount of inclusions can reach a lower level quickly. The morphology of debris can be changed, and the spheroidization of inclusions is obvious. It can refine the ferritic grains, improve the impact toughness and processing performance of steel, improve the flow of molten steel, prevent the clog of the water nozzle, use silicon barium to deoxidize molten steel, reduce the steelmaking process (can replace the application of a variety of deoxidizers), improve product quality and reduce production costs.
Silico-barium predominance：
1, gray cast iron can greatly increase the graphitized core, refine graphite, obtain A-type graphite, improve strength, graphite in nodular cast iron can be small, round, spherical.
2, can effectively reduce the supercooling of hot metal, promote the precipitation of graphite, significantly reduce the white tendency, reduce the relative hardness of castings, improve the cutting performance of castings.
3, strong anti-decay ability, anti-decay time is twice as long as 75 silicon, the amount of silicon barium inoculant added is less than half of 75 iron silicon inoculant, while preventing related spherical decay.
4, the wall thickness sensitivity is small, the section uniformity is improved, the contraction loosening tendency is reduced.
5, the chemical composition is stable, the processing size is uniform, the composition and quality deviation is small.
6, low melting point (less than 1300°), easy to absorb and melt when inoculated, scum very little.
