A comparative study on work surface hardness EDMed by Ta-C powder compacted and copper electrodes
Abstract. Tantalum-carbide and solid copper electrodes were used to EDM mild steel. Current, spark on-time and off-time were taken as the machining variables. It was found that work surface hardness increases while machining with high current and on-time. However, increase in spark off-time results...
| Main Authors: | , , |
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| Format: | Book Chapter |
| Language: | English |
| Published: |
International Islamic University Malaysia
2011
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/25556/ http://irep.iium.edu.my/25556/ http://irep.iium.edu.my/25556/2/Chapter_12.pdf |
| Summary: | Abstract. Tantalum-carbide and solid copper electrodes were used to EDM mild steel. Current, spark on-time and off-time were taken as the machining variables. It was found that work surface hardness increases while machining with high current and on-time. However, increase in spark off-time results decrease in work surface hardness. It was also found that the surface machined with pure copper electrodes is harder than that machined by tantalum-carbide powder metallurgy compacted electrodes. |
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