Tecnologia em Metalurgia, Materiais e Mineração
https://tecnologiammm.com.br/article/doi/10.4322/2176-1523.20202119
Tecnologia em Metalurgia, Materiais e Mineração
Artigo Original

Tribological evaluation of duplex treatment of plasma nitriding/ oxidation applied to injection mold extraction system

Tiago Marcelo Reis, Aline Luísa Bandeira Dotta, Maria Cristina Moré Farias, Alexandre Luís Gasparin

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Resumo

This work analyzes the application of surface treatment of plasma nitriding with post-oxidation applied to injection mold extractor pins to reduce the injection cycle’s interruptions for mold lubrication. For that, a device that simulates the operation of the injection mold extraction system was created. Wear was evaluated by mass loss and dimensional variation of the extraction pins and their bushings. The samples were characterized by microhardness and X-ray diffraction (XRD). The wear mechanisms were identified by scanning electron microscopy (SEM) and the coefficient of friction was analyzed employing a ball-on-plate tribological test. The results showed that the proposed system with plasma nitriding and postoxidation meets the requirements with a lubrication interval twice as long as the current system.

Palavras-chave

Injection mold; Plasma nitriding; Post-oxidation; Tribology

Referências

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Submetido em:
09/06/2019

Aceito em:
06/07/2020

5fc10cdd0e8825d245f5cc95 tmm Articles
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