Patent ID: 6306523
Filing Date: 2001-10-23
Classification: B21C,B23H,C23C,Y10S,Y10T

Abstract:
A method of manufacturing a coated electrode wire for use in electrical discharge machining comprising:providing an intermediate wire having a first diameter and made of a first metal including copper;hot dip galvanizing the intermediate wire through a molten bath of a second metal having vaporization temperature lower than the first metal for a desired time and temperature, wherein an alloy layer is formed on the intermediate wire by diffusion reaction of the first metal and the second metal, having hardness higher and lower elongation than the first metal and second metal, and wherein a coating layer is formed on the alloy layer; anddrawing the intermediate wire having the alloy layer and the coating layer to form a coated electrode wire having a second diameter, wherein cracks are formed during the drawing step in the alloy layer and the coating layer due to the high hardness and low elongation.