| 摘要 |
PURPOSE:To maintain consistent drawability and increase productivity, by drawing wire for welding by use of an aqueous dispersion which contains specified amts. of fluorine-contg. resin, silicic acid salt, surfactant and metallic soap. CONSTITUTION:Drawing of wire for welding is perfomed by use of a lubricant consisting of an aqueous dispersion which contains 2.5-8.5wt% fluorine-contg. resin, 10.5-50wt% silicic acid salt, 0.2-4.5wt% surfactant (excluding metallic soap) and 0.15-4.5wt% metallic soap. When the amount of fluorine-contg. resin is less than 2.5wt%, coating film loses strength and drawability of wire becomes poor and when it exceeds 8.5wt%, intake of lubricant by dies is hindered, although coating film has a higher strength. The silicic acid salt improves adhesion of coating film, but when it is used in less than 10.5wt% a thin film is formed which can not stand high surface wear. When the amount exceeds 50wt%, separation of film occurs. The surfactant increases intake of lubricant by dies and the metallic soap improves uniform dispersion of fluorine-contg. resin. |
