| 摘要 |
1,096,417. Making welding wires; welding by fusion. ESAB Ltd. Sept. 6, 1965 [Sept. 7, 1964], No. 37974/65. Headings B3A and B3R. A tubular welding wire or rod, e.g. for manual or automatic consumable electrode welding, electro-slag welding, carbon arc or tungsten inert gas shielded arc welding, is formed by shaping a metal strip to a channel section, depositing a powdered composition containing an inorganic binder having a melting point in the anhydrous state below 550‹ C., closing the strip and forming a tube of a required size by rolling and/or drawing and heating to not more than 550‹ C. to fuse the binder. Subsequently the wire may be cut into lengths. The binder may be chromium trioxide, boric oxide or boric acid. If the filling is anhydrous the tube is completely closed. Otherwise a gap may be left to allow steam to escape during heating. If desired two or more constituents may be bonded with a potassium or sodium silicate binder and granulated prior to mixing with say chromium trioxide. A mild steel tube may contain 65% Cr, 32% Ni, 3% CrO 3 and be coated with a titania-based flux. |
