GOMES, M.P.SANTOS, I.P.REIS, L.A.M.CIONE, F.C.COLOSIO, M.A.ROSSI, J.L.2020-06-012020-06-01GOMES, M.P.; SANTOS, I.P.; REIS, L.A.M.; CIONE, F.C.; COLOSIO, M.A.; ROSSI, J.L. Influence of air quenching on apparent hardness of valve seat inserts obtained with AISI M2 high-speed steel powder. In: ENCONTRO CIENTÍFICO DE FÍSICA APLICADA, 8., 4-7 de setembro, 2017, Vitória, ES. <b>Anais...</b> São Paulo, SP: Blucher Proceedings, 2017. p. 39-41. DOI: <a href="https://dx.doi.org/10.5151/phypro-viii-efa-10">10.5151/phypro-viii-efa-10</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/31222.http://repositorio.ipen.br/handle/123456789/31222The aim of this work consisted of evaluate the influence of heat treatment on sintered valve seat inserts (VSI) obtained with the AISI M2 high-speed steel powder. The AISI M2 high-speed steel powder was mixed with iron powder and additives such as manganese sulphide, zinc stearate, graphite and carbides. The heat treatment of the VSI consisted of air quenching followed by double tempering it in seven different equidistant temperatures, from 100 °C until 700 °C. The mechanical property was measured regarding the VSI apparent hardness. The results indicated that the VSI obtained with the AISI M2 high-speed steel powders mixtures showed the best results regarding its apparent hardness after air quenching and double tempering it at 600 °C.39-41openAccesspowder metallurgyairquenchingvalvessteelsTexto completo de evento10.5151/phypro-viii-efa-100000-0002-8304-9939https://orcid.org/0000-0002-8304-9939