Plated tungsten wire rod and drawing manner

摘要

PURPOSE: To provide a smooth plated tungsten wire rod poor in pin holes. ;CONSTITUTION: The tungsten wire rod X subjected to plating with nickel or platinum on the golden layer formed by strike plating on the tungsten surface is drawn by a die 1 controlled to a certain temperature between 100 and 950°C. Further the wire rod X whose tungsten surface is plated directly with nickel or platinum is drawn while the temperature of the die 1 is controlled to a certain temperature between 100 and 700°C. In this way, for example, when the wire rod is used as ionized wire, etc., an equipment is improved in characteristics and corrosion resistance.;COPYRIGHT: (C)1993,JPO&Japio