Avaliação do ciclo de vida de um corpo de prova de aço maraging 300 para a indústria aeronáutica

• Autor(a) principal: Moreira, Felipe Stringa
• Data de Publicação: 2022
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/217251
• topic: Aço; Ciclo de vida do produto; Usinagem

The maraging steel was designed in the 50´s seeking to produce a steel for rocket engine envelopes for large sizes. Thus, this steel depicts ultra-high mechanical resistance (1800 – 2200 MPa) and high mechanical toughness. Therefore, this steel can be applied in the aerospace and telecommunication industries. The current subtractive processes accept the application of this steel in landing gears of big planes, injection moulding dies and parts in the nuclear plants. Even though this steel exists several years ago in the market, and their metallurgical understanding is well-stablished, few is known about the environmental impacts in the part fabrication. This study aims to assess the environmental and production impacts of the subtractive manufacturing (SM) of Maraging 300 steel parts. The environmental impacts will be conduct using the life cycle assessment (LCA) and a cradle-to-gate approach. We expect to depict the main environmental factors regarding the parts fabrication using SM, since the raw material to parts machining, and suggest alternatives to improve the environmental performance of this process and suggest alternatives for environment improvement. This study is based on UPLCI methodology and got a major result comparing to one additive manufacturing method (AM), Laser Based Powder Bed Fusion (L-PBF). Since ambiental hotspots were obtained could be compared when is right to choose material deposition or removal. Both methods have their hotspot on eletricity consumption, this results comes from brazillian energy matrix which is mostly from hidropower.