Welding wire for surface pretreatment of crystallizer copper plate

The invention discloses a welding wire for crystallizer copper plate surface pretreatment, which comprises a welding rod core and a welding rod coating, the welding rod core is composed of carbon, carbon structural steel, manganese, silicon, chromium, nickel, sulfur, phosphorus and copper, and the welding rod core comprises the following components in parts by weight: 0.2-0.8 part of carbon; 10 to 15 parts of carbon structural steel; 0.5 to 1.2 parts of manganese; 0.8 to 1.3 parts of silicon; 1-3 parts of chromium; 1.3 to 2.5 parts of nickel; 0.08 to 0.12 part of sulfur; 0.1 to 0.3 part of phosphorus; the welding rod coating is composed of oxide, acid salt, metal alloy, powder and glass water. The welding rod is composed of the welding rod core and the welding rod coating, the welding rod core is composed of the carbon, the carbon structural steel, the manganese, the silicon, the chromium, the nickel, the sulfur, the phosphorus and the copper, the overall strength of the welding rod core can be effectively im