dc.contributorVicente Tadeu Lopes Buono
dc.contributorhttp://lattes.cnpq.br/5856832655059418
dc.contributorLeandro de Arruda Santos
dc.contributorMárcio Silveira e Silva
dc.creatorMirelle Oliveira Spindola
dc.date.accessioned2022-04-18T19:36:26Z
dc.date.accessioned2022-10-03T22:15:47Z
dc.date.available2022-04-18T19:36:26Z
dc.date.available2022-10-03T22:15:47Z
dc.date.created2022-04-18T19:36:26Z
dc.date.issued2019-11-12
dc.identifierhttp://hdl.handle.net/1843/41066
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3797491
dc.description.abstractConsidering the high cost associated with the spheroidization heat treatment of bearing steels, it is necessary to study alternatives to decrease the annealing heat treatment time. This work aimed to develop a new manufacturing route in order to obtain a completely spheroidized microstructure. The microstructure and mechanical properties of the steel were evaluated after intercritical annealing with higher cooling rate than the conventional one, followed by cold deformation with different reductions in area, and subcritical annealings with different soaking times. It has been observed that the route considering the intercritical annealing with cooling rate 8.6 times higher than the conventional one, followed by a high cold reduction and subcritical annealing for 1 hour turns feasible the complete spheroidization of SAE 52100 steel. For low cold reductions, even with subcritical annealing during 3 hours, the samples showed lamellar carbides. Regarding the mechanical properties, for the same cold reduction, it was not identified significative difference for yield strength, tensile strength and hardness by increasing the soaking time during subcritical annealing. Nevertheless, the yield strength for the samples in higher reduction was bigger than the samples in lower reductions.
dc.publisherUniversidade Federal de Minas Gerais
dc.publisherBrasil
dc.publisherENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICA
dc.publisherPrograma de Pós-Graduação em Engenharia Metalúrgica, Materiais e de Minas
dc.publisherUFMG
dc.rightsAcesso Aberto
dc.subjectEsferoidização
dc.subjectRecozimento subcrítico após deformação a frio
dc.subjectAço SAE 52100
dc.titleEstudo de elevada taxa de resfriamento após recozimento intercrítico aliado com redução a frio e recozimento subcrítico para viabilizar a esferoidização do aço SAE 52100
dc.typeDissertação


Este ítem pertenece a la siguiente institución