MOLTEN COPPER PLATING METHOD AND COPPER PLATING DEVICE OF STEEL WIRE

摘要

PURPOSE:To manufacture easily a steel wire having a copper plating layer of a uniform thickness by making the steel wire pass through a molten copper placed in a reducing atmosphere. CONSTITUTION:A molten Cu 11 is put into a plating bath tub 10, its surface is covered with a charcoal powder layer 12, an upper space 17 of the plating bath tub 10 is filled with a non-oxidizing atmosphere by an inert gas or a reducing gas which has been led in from a feed-in hole 18 provided on a Cu plating steel wire leading-out cylindrical body 15, and an O2 content in the molten Cu 11 is set to =30ppm. A steel wire W whose surface has been cleaned by pickling, washing, etc., is made to pass through the molten Cu 11 through a pinch roll 21, an immersing roller 13 and a receiving roller 20, a Cu plating layer of the surface of the steel wire W is solidified by a cooling muffler 19 in an early stage, and the Cu plating layer of a uniform thickness having no biased thickness is formed.