Double-pulsed wire electrochemical micro-machining of type-304 stainless steel

作者：Gao, Chuanping; Qu, Ningsong^*; He, Haidong; Meng, Lingchao

来源：Journal of Materials Processing Technology, 2019, 266: 381-387.

DOI：10.1016/j.jmatprotec.2018.11.018

• WEMM
• Electrolysis product
• Double pulse
• 304 stainless steel

Traditional wire electrochemical micro-machining (WEMM) of type-304 stainless steel using dilute hydrochloric acid (HC1) generates a certain amount of insoluble electrolysis product that adheres onto the wire. As the machining process continues, a blackened layer is generated on the wire that hampers the machining process. Herein, a double-pulsed WEMM (DP-WEMM) method is proposed to eliminate this blackened layer, effectively so as indicated by experimental results. An optimal negative voltage is determined as -0.3 V. The slot profile and machining stability obtained with DP-WEMM are considerably better than those with traditional WEMM. For the same machining parameters and feed rate, traditional WEMM with dilute HCl manages a 1.8-mm-long slot until short circuit occurs. By contrast, DP-WEMM is terminated manually after a 5.0-mm-long slot is obtained, there having been no short circuit.

• 出版日期2019-4
• 单位南京航空航天大学