Influence of different dielectrics fluids on the surface integrity of high speed steel

Machining by electrical discharges is a huge process for the machining of complex shapes in materials that are electrical conductors, in particular for those of high hardness, difficult to be machined by conventional processes. Its unique feature of using thermal energy to machine parts has been a d...

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Bibliographic Details
Published in:	Acta scientiarum. Technology Vol. 40; no. 1; pp. 35386 - e35386
Main Authors:	Rodrigues, Jean Robert Pereira, Forte, Paulo Ricardo Almeida, Cunha, Adilto Pereira Andrade, Gonçalves, Rubens Soeiro, Melo, Mirian de Lurdes Noronha Motta, Nascimento, Carmem Célia Francisco do
Format:	Journal Article
Language:	English
Published:	Maringa Editora da Universidade Estadual de Maringá - EDUEM 01-01-2018 Universidade Estadual de Maringá
Subjects:	Abrasion resistant steels Aircraft components Conductors Die stamping dielectric fluid Dielectrics Dies Electric conductors Grooves Heat affected zone High speed tool steels Machining machining by electrical discharges Microcracks microcracks and heat affected zone Molds Surgical instruments Thermal energy Tooling
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Summary:	Machining by electrical discharges is a huge process for the machining of complex shapes in materials that are electrical conductors, in particular for those of high hardness, difficult to be machined by conventional processes. Its unique feature of using thermal energy to machine parts has been a distinctive advantage in the manufacture of moulds, dies, aerospace components, and surgical, and of course, it can be widely used in the industry of tooling in the manufacture of geometric features, such as, for example, cavities narrow and deep, grooves, thin-walled, and small corner radii. One of the materials that are widely machined by spark-erosion is the tool steel (ABNT M2, has good toughness, hardness and abrasion resistance being indicated for the manufacture of stamping dies. The present work describes experiments conducted on a modern machine eletroerosiva using the electrode-tool of electrolytic copper in the machining of parts from high-speed steel (ABNT M2 to investigate the effect of different fluid dielectric about the generation of microcracks and heat affected zone (HAZ). A review of the comparative shows that the surfaces machined with dielectric fluid “A” have low values in the length of the microcracks compared with the other fluids. In the meantime, the machined surfaces with the dielectric “B” have a lower density of microcracks.
ISSN:	1806-2563 1807-8664 1807-8664 1806-2563
DOI:	10.4025/actascitechnol.v40i1.35386