Effects of different inoculants on the microstructural characteristics of gray cast iron gg-25, hardness and useful life of tools

Autores

  • Diego Ruben Martin Universidade Tecnológica Federal do Paraná Autor
  • Joao Roberto Sartori Moreno Universidade Tecnológica Federal do Parana Autor
  • André de Albuquerque Vicente Universidade de São Paulo Autor

DOI:

https://doi.org/10.4025/actascitechnol.v37i4.27460

Palavras-chave:

machinability, strontium sulfide, tool wear, critical radius, eutectic cells.

Resumo

Current study evaluated the machinability characteristics of parts, microstructure and mechanical properties when three different inoculants (IM-22 with FeSi-Ba/Zr; G-20 and FeSi-Ba; IMSR 75 with FeSi-Sr) were added in experiments carried out in a foundry. The research methodology was mailly based on the analysis of the machinability by the milling process of the specimens in gray cast iron GG-25, name according to DIN EN 1561.Evaluation of results is based on a thorough analysis of tool wear, surface finish, microstructural analysis, chemical composition and mechanical properties of the material. Results showed that among the studied inoculants strontium sulfide (SrS) was thermodynamically more stable than the others, because it leds towards a more negative free energy change of Gibbs and therefore more favorable to the formation of nuclei having greater critical radius (rc), solidification with heterogeneous nucleation. Its inoculant was also more efficient in forming a more favorable microstructure, greater amounts of eutectic cells and, longer life of the insert when machined.

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Biografia do Autor

  • Diego Ruben Martin, Universidade Tecnológica Federal do Paraná
    Materiais
  • Joao Roberto Sartori Moreno, Universidade Tecnológica Federal do Parana
    Professor Írea Materiais, Chefe do Laboratorio de Ensaios e Analise de Materiais; Professor Permanente do Programa de Mestrado UTFPR-CP
  • André de Albuquerque Vicente, Universidade de São Paulo
    Gerente Técnico Comercial, PRM Ind. e Serviços de Solda Ltda - São  
    Paulo - Brazil
    Pesquisador da Escola Politécnica da USP - São Paulo - Brazil

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Publicado

2015-10-01

Edição

Seção

Engenharia Mecânica

Como Citar

Effects of different inoculants on the microstructural characteristics of gray cast iron gg-25, hardness and useful life of tools. (2015). Acta Scientiarum. Technology, 37(4), 355-360. https://doi.org/10.4025/actascitechnol.v37i4.27460

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