All-position alkaline flux-cored wire

The invention provides an all-position alkaline flux-cored wire which comprises a flux core and a low-carbon steel strip wrapping the outer side of the flux core, and the flux core accounts for 14%-16% of the total weight of the flux-cored wire; the flux core comprises the following components in percentage by weight: 16%-18% of fluorite, 16%-18% of marble, 4%-6% of magnesium carbonate, 2%-4% of barium fluoride, 2%-4% of sodium fluosilicate, 3%-5% of magnesium fluoride, 3%-5% of feldspar, 5%-8% of metal manganese, 5%-7% of silicon iron, 1.5%-3% of aluminum-magnesium alloy, 5%-8% of medium-carbon ferromanganese and the balance iron powder. According to the all-position alkaline flux-cored wire, all-position welding can be conducted, and the vertical welding process performance is good. 本发明提供了一种全位置碱性药芯焊丝，包括药芯和包覆在药芯外侧的低碳钢带，所述药芯占焊丝总重量的比例为14％-16％；所述药芯包括如下重量百分数的组分：萤石16％-18％，大理石16％-18％，碳酸镁4％-6％，氟化钡2％-4％，氟硅酸钠2％-4％，氟化镁3％-5％，长石3％-5％，金属锰5％-8％，硅铁5％-7％，铝镁合金1.5％-3％，中碳锰铁5％-8％，铁粉：余量。本发明所述的全位置碱性药芯焊丝，能够进行全位置焊接，立焊工艺性能较好。