Applying of Powder Materials for Improvement Efficiency Machining of AISI D2 Tool Steel by EDM
Keywords:
Powder Material, AISI D2 Tool Steel, EDMAbstract
This research investigates the effect of powder materials mixing into the dielectric fluid of EDM on machining characteristics of AISI D2 tool steel. The additives with different powder materials, including graphite, boron carbide, and diamond powders are studied. The concentration of powders was 2, 4, 6, 8, and 10 g/l. The machining characteristics considered were machining performance and surface quality. Experimental results show that the addition of graphite and boron carbide powders exhibits a good electrical conductivity, but increasing the concentration of diamond powder is lower electrical conductivity due to insulating of the powder. The addition of graphite and boron carbide would reduce the insulating strength of the dielectric fluid and increases the spark reaction between the tool and workpiece. The process becomes more stable, can increase the material removal rate, decrease the surface roughness, and improve the surface quality of the work.
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