Produção Nacional
Revisado por pares
Avaliação da Geração de Microtrincas do Aço Rápido ABNT M2 no Processo EDM com Adição de SiC.
2008; Editora da Universidade Estadual de Maringá (Eduem); Volume: 30; Issue: 2 Linguagem: Inglês
10.4025/actascitechnol.v30i2.543
ISSN1807-8664
AutoresJean Robert Pereira Rodrigues, Claudionor Cruz, Sinésio Domingues Franco, José Roberto Pereira Rodrigues, Wellinton de Assunção,
Tópico(s)Advanced Machining and Optimization Techniques
ResumoIt is known that Electrical Discharge Machining (EDM), it is a thermal process where it can be had very high temperatures (higter than 1200° C) in the region of machining consequently is easy to understand that during each electric discharge, hight temperatures are generated, causing local fusion or even evaporation of the material machined. In each discharge, a crater is formed in the material and a small crater is formed in the electrode. Of every melted material produced in each discharge, only 15%, or minus, it is removed through the dielectric liquid. The remaining of the melted material solidifies forming a wrinkled surface. The characteristics of the surface obtained, overlap of craters, globules of sullage, “chimneys ", bubbles (formed when the gases arrested are liberated through the material resolidificado), they are revealed through an analysis by scanning electron microscope. O proposed work, has for objective to study the effect of the addition of powder of SiC in several dielectric fluids, on microcrack generation, in workpiece of the high speed steel (ABNT M2), during the electrical discharge machining. The presented results show that the samples machined with the addition of powders of SiC presented significant reduction of the number of microcrack in the surface machined, when compared with the machined with conventional EDM.
Referência(s)