Welding wire is commonly supplied in the form of wire coils, wire coils and wire tube. The Bottom of the wire must be smooth and smooth. If the wire is rusted, it must be deflected with a wire descaling machine to remove the surface oxide. For the same type of welding wire, when the Ar-O2 used for shielding gas welding, the chemical composition of the deposited metal and the chemical composition of the welding wire is not very apart, but when using CO2 as a protective gas welding, the deposition of manganese in the metal, The content of silicon and other deoxidizing elements will be greatly decreased, and care should be taken when selecting welding wires and shielding gases. - In general, solid wire and flux-cored wire are not susceptive to moisture and do not require drying. Before welding, the weldment should be degreasing and iron mould removal. After welding wire is purchased, it shall be picked in a special welding material library. For Barred wire...