| abstract |
A bare continuous tubular electrode consisting of a metallic outer sheath and a core within and enclosed by the sheath, the electrode consisting essentially of, by weight: 0.05 to 0.36 per cent. of at least one fluxing agent selected from the group consisting of lithium fluoride, cryolite, potassium silicofluoride and sodium silicofluoride; 0.01 to 1.8 per cent. in total of slag former selected from the group consisting of titanium dioxide, potassium permanganate, sodium feldspar, zirconium silicate, calcium silicate, magnesium oxide, manganese oxide and calcium carbonate, but no more than 1.2 per cent. of any individual slag former; 0 to 0.012 per cent. of arc stabilizer comprising potassium titanate; the balance of the electrode being metal-bearing material; said metal-bearing material containing, by weight of the electrode, 1.5 to about 10 per cent. alloying ingredients and deoxidizer, said alloying ingredients and deoxidizer comprising 0.6 to 1.8 per cent. manganese and 0.25 to 0.9 per cent. silicon, the balance of the metal-bearing material being essentially iron. The fluxing agent desirably comprises 0.12 per cent. cryolite and the slag former desirably includes titanium dioxide, sodium feldspar, zirconium silicate and calcium silicate. The electrode preferably contains up to 0.2 per cent. carbon, 0 to 4 per cent. nickel, 0 to 6 per cent. chromium and 0 to 1.3 per cent. molybdenum. The fluxing agent may be selected from lithium fluoride, potassium silicofluoride and sodium silicofluoride and the slag former may comprise 0.024 per cent. calcium carbonate while the electrode may contain up to 0.2 per cent. carbon, 0 to 4 per cent. nickel, 0 to 6 per cent. chromium and 0 to 1.3 per cent. molybdenum. |