| 摘要 |
1352761 Making coated steel wire MICHELIN & CIE (COMPAGNIE GENERALE DES ETABS MICHELIN) 19 April 1971 [12 Feb 1970] 22470/71 Heading B3A [Also in Divisions C7 D1 and E1] A coated steel wire has a diameter not exceeding 0À40 mm. and a single work-hardened (e.g. drawn) coating of nickel or of a nickel alloy containing at least 20% by weight of nickel. The coated wire may be incorporated in a steel cord and may be used to reinforce a pneumatic tyre. The nickel alloy may contain copper, tin, cobalt and/or zinc. The nickel or nickel alloy may have an underlayer of copper and/or an overlayer of copper or brass. In Example 1, a drawn hard steel wire of diameter 0À95 mm. was cleaned, patented in a reducing atmosphere, degreased, pickled, coated electrolytically with (i) Ni, (ii) Cu and (iii) Zn and thereafter heated to 450‹ C. to transform the Cu and Zn into a single brass layer, and wet drawn by passage through a series of extruders to a diameter of 0À18 mm. In Example 2, drawn steel wire is degreased, pickled, electrolytically plated with (i) Ni and (ii) Cu, patented by heating at 930‹ C. in a reducing atmosphere thus obtaining a 70% nickel Ni-Cu alloy and then wet drawn to a diameter of 0À19 mm. |
