The weld formation of two wires after welding the welding strength according to the environmental conditions and different theory in the welding environment and conditions such as air flow around and so on under the condition of the same welding formed using flux cored wire and its strength is better than solid wire, its principle is medicine cored wire in welding process the effect of electrode and welding seam in the same, will make the weld process and air separated in the cooling before being oxidized and ensure the strength of welding, and welding wire are basically used for gas welding, welding wire is used or played a main role in the protection of inert gas such as argon, so the use of the double protection of flux cored wire called "gas slag protection", and the use of solid wire is only for gas shielded flux cored wire, compared to less weight protection, so the use of drugs in the same conditions The welding strength is better than that of solid wire.