Welding rod for surfacing welding of cold-punching die and manufacturing method

The welding rod comprises a core wire and a coating, the coating is evenly arranged on the periphery of the core wire, and the coating comprises, by mass, 31%-33% of high-carbon ferrochrome, 15%-17% of tungsten carbide, 9%-11% of tungsten powder, 7%-8.5% of marble, 5%-7% of ferrovanadium, 4%-5.5% of ferromolybdenum, 3%-4.5% of ferrocolumbium, 3%-4% of phlogopite, 2%-4% of manganese-silicon alloy, 2%-4% of ferrosilicon, 2%-5% of boron carbide, 1%-2.5% of fluorite and 1%-2.5% of high-carbon ferromanganese. 0.5%-1.2% of graphite and 1%-2.5% of ferrotitanium. The welding rod is high in air hole resistance, a welded seam is high in hardness after welding, the skin is smooth, the press-coating property is good, and the welding rod has high hardness and good abrasion resistance and toughness. 本发明提供一种用于冷冲模堆焊的焊条，包括：焊芯和药皮，药皮均匀设置在焊芯的外周，药皮包括以下质量百分数的原料：高碳铬铁31～33％，碳化钨15～17％，钨粉9～11％，大理石7～8.5％，钒铁5～7％，钼铁4～5.5％，铌铁3～4.5％，金云母3～4％，锰硅合金2～4％，硅铁2～4％，碳化硼2～5％，萤石1～2.5％，高碳锰铁1～2.5％，石墨0.5～1.2％,钛铁1～2.5％。本发明的焊条抗气孔性能高，焊接后的焊缝硬度强，表皮光滑、压涂性好、具有较