| 摘要 |
A method of manufacturing a porous electrode wire for electric discharge machining, comprising passing a wire rod comprising a first metal containing copper through a plating bath of a second metal having a vaporizing temperature lower than that of the first metal to form on a surface of the wire rod an alloy layer having a hardness higher than those of the first and second metals and an elongation percentage lower than those thereof by a diffusion reaction of the first and second metals, forming a layer of a plating metal comprising the second metal on a surface of the alloy layer, and then drawing the resultant wire rod to form cracks in the alloy layer and the plating metal layer. This electrode wire has an improved working rate at least 15 % higher than that of a regular zinc-plated electrode wire and such an improvement of the working rate is ascribed to an increase in the surface area of the electrode wire owing to a porous structure of the surface thereof which in turn increases a rate of cooling the electrode wire with a working fluid. |
