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The influence of additive powder on machinability and surface integrity of SKD61 steel by EDM process

Tao Le, V. (2021) The influence of additive powder on machinability and surface integrity of SKD61 steel by EDM process. Materials and Manufacturing Processes, 36 (9). pp. 1084-1098. ISSN 10426914

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Abstract

The powder mixed electrical discharge machining, also called PMEDM, is gaining much attention, because it is demonstrated as a good solution for enhancing productivity and surface integrity. In this research, the influence of main process parameters, including peak current, pulse on time, and powder concentration in the PMEDM with tungsten carbide powder on the machinability of SKD61 steel–i.e., material removal rate (MRR) and tool wear rate (TWR), was firstly investigated. Subsequently, the surface integrity of the recast layer, including the chemical composition, the recast layer thickness (RLT), and the percentage of the surface micro-crack density acreage (PSCDA) was analyzed and discussed. The results show that peak current, pulse on time, and powder concentration have influence on the machinability and surface integrity. MRR and TWR have changed in an uptrend when peak current, pulse on time, and powder concentration increase. At Ip = 3A; Ton = 200 µs; Cp = 60 g/l, the largest change in MRR and TWR are 165.714% and 163.830% respectively as compared with the EDM method. The chemical composition of machined surfaces was also transformed. In comparison to the EDM method, PSCDA and RLT generated by the PMEDM method were significantly reduced, up to 52.558% and 63.366%, respectively. © 2021 Taylor & Francis.

Item Type: Article
Divisions: Research centers > Advanced Technology Center
Identification Number: 10.1080/10426914.2021.1885710
Uncontrolled Keywords: Carbide cutting tools; Chemical analysis; Cutting tools; Electric discharges; Machinability; Tungsten carbide; Chemical compositions; Machined surface; Material removal rate; Micro-crack density; Powder mixed electrical discharge machining; Pulse on-time; Surface integrity; Tool wear rate; Electric discharge machining
Additional Information: Language of original document: English.
URI: http://eprints.lqdtu.edu.vn/id/eprint/8815

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