Tempering of martensitic 12 percent chromium steels high temperature gas nitrided
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2000
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CONGRESSO BRASILEIRO DE ENGENHARIA E CIENCIA DOS MATERIAIS, 14.
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Resumo
AISI 410 (11.5%Cr – 0.13%C) and AISI 410S (13,0%Cr – 0.07%C) steels were gas nitrided
at 1200o
C, in order to obtain surface nitrogen contents between 0.27 and 0.61%. The
specimens were direct quenched and tempered, between 200-650o
C for one hour. The AISI
420 steel (12,4%Cr-0.37%C) was quenched from 1100o
C and tempered at the sames
temperatures used for nitrided steels, was emploied as comparision material.
Microstructural evolution and tempering kinetics were studied by optical microscopy, scaning
electron microscopy, X-ray difracttion, dilatometry and differential thermal analysis.
The tempering stages were shifted to higher temperatures and wider intervals in the nitrided
steels, probably due to differences in bonding character of the solid solutions Fe-Cr-N-C and
Fe-Cr-C. The nitrided steels showed a better tempering resistance probably due to M2X
precipitation.
Como referenciar
GARZON OSPINA, C.M.; TSCHIPTSCHIN, A.P.; LIMA, N.B. Tempering of martensitic 12 percent chromium steels high temperature gas nitrided. In: KIMINAMI, C.S. (ed.); EIRAS, J.A. (ed.); PESSAN, L.A. (ed.); TOMASI, R. (ed.). In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIENCIA DOS MATERIAIS, 14., 3-6 dez, 2000, Sao Pedro, SP. Anais... p. 28101-28112. Disponível em: http://repositorio.ipen.br/handle/123456789/13401. Acesso em: 30 Dec 2025.
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.