Experimental study on electrochemical discharge machining of MMCs with a new type of electrical corrosion resistance abrasive electrode
To solve the problem of rapid electrode loss of particle reinforced metal matrix composite(PR-MMCs)tool by electrochemical discharge machining using traditional Cu-based abrasive electrode.In this paper,a CuW alloy with high melting point and high hardness was proposed as the matrix material of the abrasive electrode,and a new method of high-speed grinding-aided electrochemical discharge machining(G-ECDM)of PR-MMCs using CuW abrasive electrode was explored.The conventional electrode,Cu-based abrasive electrode and CuW-based abrasive electrode were used to machine SiCp/Al.The results show that compared with the traditional electrode and Cu-based abrasive electrode,the CuW-based abrasive electrode showed better corrosion resistance and efficiency in the machining of SiCp/Al.The TWR of CuW-based abrasive electrode is lower than that of Cu electrode and traditional Cu-based abrasive electrode,and the lowest TWR can reach 1.1%of Cu electrode and 28.8%of traditional Cu-based abrasive electrode.MRR of CuW-based abrasive electrode is higher than that of Cu electrode and traditional Cu-based abrasive electrode,up to 8.0 times of Cu electrode and 2.5 times of traditional Cu-based abrasive electrode.
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