Characteristics Of New Inoculants

Fused Alumina is the tooth of industry and is widely used in various industries. TAOANG is committed to sharing information on the upstream and downstream industries of fused alumina. Silicon germanium inoculants are mostly used for thin-walled and thick, thin and uneven castings such as piston rings. The silicon germanium inoculant contains a sufficient amount of silicon, and the inoculation effect is strong. Less than 2% of the antimony has obvious effects on improving the graphite morphology, improving the cross-section uniformity, and prolonging the growth and decline of the gray iron and the ductile iron. Both strontium and strontium belong to the terroir metal, and their long-term gestational effects are basically the same. It is generally believed that as the number of eutectic groups increases, the tendency of shrinkage of cast iron increases, the number of eutectic groups decreases, and the amount of white slabs increases. However, the use of strontium ferrosilicon does not significantly increase the number of eutectic groups, but it is very Strong elimination of white mouth ability is conducive to reducing shrinkage of castings. The inoculant contains less than 0.1% calcium, reduces slag formation, and improves the ability of cockroaches. Piston ring castings are prone to very small air holes. Manufacturers require aluminum containing less than 0.2% or 0.3%. Thin-walled castings for cylinder heads contain less than 0.5% aluminum, which saves costs and produces better results. very good.Silicon zirconium inoculants have made great progress in recent years. As a silicon-based inoculant, the silicon-containing amount has a high effect of gestation, good cross-section uniformity, and small surface hardness difference. Another important element, zirconium, reacts with nitrogen to form a nitride that reduces dissolved nitrogen, prevents reversible nitrogen uptake by molten iron, and inhibits gestational decline. The cupola furnace is double-melted with electric furnace. The contact time of molten iron is long. The number of crystal nuclei decreases after the temperature rises in the electric furnace, and the white mouth tends to increase. With the inoculation effect of silicon zirconium, good inoculation effect can be obtained. Zirconium and titanium are the same subgroup. Zirconium is a strong carbide forming element, which increases the austenite base and refines the grains, thereby increasing the strength of the cast iron. The austenite in the steel is dissolved in N, and the proportion of scrap in the charge is large. The use of silicon zirconium can highlight the effect of zirconium. According to the data, the lattice constants of carbides and oxides of zirconium, hafnium and niobium are close to those of graphite, but the affinity with oxygen is weak, and the oxidation reaction occurs with hysteresis, so the anti-recession ability is strong. Carbides and nitrides formed by a small amount of zr in molten iron act as a graphite crystal core and contribute to graphitization. It is said that when adding elements such as magnesium, zirconium and rare earth, the hydrogen content of molten iron can be reduced. Dissolved hydrogen can increase the degree of supercooling of cast iron, increase the tendency of white mouth and greatly reduce the tensile strength and plasticity of gray iron. Reducing dissolved hydrogen helps to improve the intrinsic quality of the casting. In the production, the bed type castings using the silicon zirconium inoculant, and the automobile parts, such as the cylinder head cover, have achieved good gestation effects. TAOANG also expects all viewers to share your insights and look forward to your information.