1 results about "Chromium nitride" 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.