Heat treatment of sintered valve seat inserts
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The characterization of sintered valve seat inserts (VSIs) after being subjected to different heat
treatment operations has been carried out. The VSIs were obtained from three different alloys by mixing
iron powder with AISI M3:2, AISI M2 high-speed steels, and AISI D2 tool steel. After sintering, the VSI
were quenched in air followed by double tempering at seven different temperatures. The cooling rate
during air quenching was measured by means of a thermocouple type k attached to a data acquisition
system. The characterization of the mechanical and physical properties of the VSIs was achieved by
measuring relative density, apparent hardness and crush radial strength. The resulting microstructures
for the sintered parts were interpreted using the isothermal and continuous cooling transformation
diagrams for similar alloys. The VSI obtained with AISI M3:2 and AISI M2 high-speed steels after
air quenching and double tempering at 600 ºC showed the best results in terms of apparent hardness
and crush radial strength.
Como referenciar
GOMES, MAURILIO P.; SANTOS, IGOR P. dos; COUTO, CAMILA P.; BETINI, EVANDRO G.; REIS, LUIS A.M. dos; MUCSI, CRISTIANO S.; COLOSIO, MARCO A.; ROSSI, JESUALDO L. Heat treatment of sintered valve seat inserts. Materials Research, v. 21, n. 5, 2018. DOI: 10.1590/1980-5373-MR-2018-0068. Disponível em: http://repositorio.ipen.br/handle/123456789/29307. Acesso em: 24 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.