Evolution of residual stress on AISI D2 tool steel short time tempering
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2023
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BRAZIL MRS MEETING, 21st
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Resumo
Some parameters are used in an attempt to estimate a relationship between time and
tempering heat treatment temperature of steels, among which the Hollomon-Jaffe
parameter stands out [1]. This work aimed to study the evolution of residual stresses in
short-time tempering treatment of AISI D2 tool steel, compared to conventional heat
treatment of tempering [2]. The samples were treated in dilatometry for a better control of
the thermal processing variables. Microstructural images were generated using optical and
scanning electron microscopy, including mapping using EDS. Vickers microhardness
measurements were performed. And the measurements of variations in residual stresses in
each of the treatment stages and at the end of the treatment cycles were performed by
analyzing the X-ray diffraction data using the Sen2Ψ technique [3]. The cycles composed of
tempering in short times carried out at 500 ºC or 600 ºC, for 10 seconds or 1 minute,
exhibited residual stress states similar to the conventional cycle, with a tendency towards
neutrality of the residual stress state and high hardness values. The final residual stresses
acquired by the AISI D2 tool steel in the thermal cycles studied, more specifically in the
tempering, can be attributed to the precipitation of tempering carbides, which when carried
out up to 600 ºC, occurs coherently, or at least partially coherently, to the matrix, producing
the neutrality of residual stresses, but when tempering is carried out at 700 ºC, it leads to
incoherent precipitation of carbides and matrix recrystallization, leading to an increase in
compressive residual stresses and a reduction in the hardness of the material, regardless of
the heat treatment time of tempering.
Como referenciar
CONCI, MAYCOLN D.; OLIVEIRA, RENE R.; CENTENO, DANY M.A.; GOLDENSTEIN, HELIO; FARINA, PAULA F. da S. Evolution of residual stress on AISI D2 tool steel short time tempering. In: BRAZIL MRS MEETING, 21st, October 1-5, 2023, Maceió, AL. Abstract... São Carlos, SP: Aptor Software, 2023. p. 1117-1117. Disponível em: http://repositorio.ipen.br/handle/123456789/34564. Acesso em: 12 May 2024.
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.