PROCESS FOR PRODUCING TUNGSTEN WIRE

摘要

A process for tungsten wire production in which wire drawing which comprises inserting a tungsten material into a drawing die and passing the material through the die is repeatedly conducted to finally produce a tungsten wire having a wire diameter of 0.05-1.10 mm. The process is characterized in that the tungsten material in the final wire drawing serving as tungsten wire finishing is regulated so as to have a reduction in area of 5-15%. The wire drawing preferably is conducted after a lubricant containing powdery graphite and a thickener is applied to the surface of the tungsten material. According to the process, a tungsten wire for use as a filament, etc. can be reduced in surface residual stress and effectively inhibited from cracking or fluctuating in wire diameter.