Análise da influência do tempo de pulso, velocidade de trepanação e energia de pulso na furação à laser por trepanação de uma liga de Inconel 718
The manufacturing of small diameter holes is essential for many industrial purposes like aerospace components and medical instruments fabrication. The Laser drilling processes are very important for the small diameter holes manufacturing (between 0.18 and 2mm). The objective of this study was to eva...
| Autor principal: | Ribas, Murilo Teixeira |
|---|---|
| Formato: | Trabalho de Conclusão de Curso (Graduação) |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2020
|
| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/16360 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: |
The manufacturing of small diameter holes is essential for many industrial purposes like aerospace components and medical instruments fabrication. The Laser drilling processes are very important for the small diameter holes manufacturing (between 0.18 and 2mm). The objective of this study was to evaluate the influence of the process input parameters on productivity, dimensional characteristics, heat affected zone and chemical composition in the inner surfaces of the holes obtained by Trepanning Laser drilling of Inconel 718 test specimens. Trepanning Laser drilling tests were performed in Inconel 718 specimens using a central composite design to study the variation of the following parameters: pulse width, trepanning speed and pulse energy. Through measurements taken during testing, metallographic sample preparation and imaging by scanning electron microscopy (SEM) was possible to evaluate the diameters of holes obtained, material removal rate (MRR) and heat affected zone (HAZ) size. Through Energy Dispersive Spectroscopy X-ray was possible to analyze the chemical composition of the channel and inner regions of the entrances of holes. Increasing the pulse time and pulse energy causes an increase of the expansion diameter, the MRR process and HAZ size. The increased trepanning speed causes decreased dilatation in diameter, increase of MRR, and has no significant effect on the size of the HAZ. The oxygen as assist gas in laser drilling process involves the formation of an oxide layer in the channels of the holes and oxide inclusions in the HAZ region. |
|---|