Effect of TiN powder mixed in Electrical Discharge Machining

[摘要] Many trials were studied about powder mixed in Electrical Discharge Machining (EDM). The experiments were carried for improving surface characteristics and related to the surface modification. The experiment was carried out using a copper tool electrode and EDMed in titanium nitride (TiN) powder mixed in dielectric fluid. In this research, to obtain the even modified layer, the effects of EDMed conditions were investigated. The EDMed surfaces were observed by SEM. Under the suitable discharge conditions in TiN powder mixed kerosene, the stable thick TiN layer adhered on the workpiece surface. The microcrack length per unit area treated in TiN mixed kerosene was greater than that treated in normal kerosene. Titanium carbon nitride (TiCN) was found on the modified layer by XRD analysis. The effect of the diffusion of carbon during cooling on the characteristics of the recast layer was discussed.

[发布机构] Faculty of Engineering, Thammasat University, Pathum thani, Thailand^1

[效力级别] 无线电电子学

[关键词] Dielectric fluid;Diffusion of carbons;Discharge conditions;Electrical discharge machining;Modified layer;Powder mixed;Surface characteristics;Tool electrode