4 results about "Ferromanganese" patented technology

The invention belongs to the technical field of welding materials, and particularly relates to a bridge steel Q690qE matched flux-cored wire and a preparing method thereof. The flux-cored wire is manufactured in the manner that a low-carbon cold-rolled steel strip is wrapped by flux core powder, and the flux core powder accounts for 20%-35% of the total mass of the welding wire. The flux core components include, by mass percent, 3.0%-5.5% of FNiN-50 nano nickel powder, 0.5%-1.2% of nano chromium nitride powder, 0.2%-0.4% of nano graphene, 0.2%-0.8% of nano cerium oxide, 1.2%-2.0% of FeMn84C0.05 micro carbon ferromanganese, 1.0%-2.0% of AlSi50 aluminum intermediate alloy, 0.25%-0.45% of Nb powder, 2.5%-4.5% of Mo powder, 0.4%-1.0% of Cu powder, 0.5%-1.0% of zirconium hafnium alloy powder (the mass ratio of zirconium to hafnium is 96:4), 2.5%-3.5% of KBF4 and the balance FHT100.25 reduced iron powder.

The invention relates to the technical field of channel steel, and discloses high-strength special-shaped channel steel, which comprises the following elements in percentage by weight: less than or equal to 0.23-0.30% of C, less than or equal to 0.35% of S, less than or equal to 0.45% of P, less than or equal to 0.45% of S and Si is smaller than or equal to 0.15% and 0.30%; mn: 1.00% to 1.30%; less than or equal to 0.025% of P; less than or equal to 0.020% of S; v < = 0.15%; nb < = 0.07%; the content of AL is 0.015 to 4.50 percent; less than or equal to 0.30% of Cr; 0.30% or less of Cu; according to the special-shaped channel steel, electroslag remelting is adopted after smelting, the purity of metal can be improved through electroslag remelting, the situation that the metal is oxidized by gas in the metal is avoided, the corrosion resistance of the special-shaped channel steel can be improved, and then the use strength of the special-shaped channel steel is improved; ferro-aluminum-manganese-iron is adopted for deoxidation, so that the deoxidation speed is high, and slag formation is good; and the addition amount of the aluminum element is reasonably controlled, oxidation in the molten steel can be stopped, and inclusions generated by re-deoxidation in the solidified steel can be reduced.