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- Title
TRATAMENTO CRIOGÊNICO E DE ALÍVIO DE TENSÕESEM UM AÇO AISI D2.
- Authors
da Silva Farina, Paula Fernanda; Farina, Alexandre Bellegard; Barbosa, Celso Antonio; Goldenstein, Helio
- Abstract
The effects of cryogenic treatments on an AISI D2 cold work tool steel using X-ray diffraction from syncronton radiation are studied. The aim of this work is to verify the effects of: i) time at cryogenic temperatures (3, 10 and 30 hours); ii) cryogenic temperatures (-80°C and -196°C); iii) stress relief heat treatment (130°C) before cryogenic treatments; iv) effect of double tempering at 520°C for 2 hours each time, after cryogenic treatment at -196°C for 30 hours, with and without previous stress relief. X-ray diffraction experiments were conducted at the line D10B-XPD of the Laboratório Nacional de Luz Síncrotron and the experimental results were treated using Rietveld refining, with TOPAS Academic in conjunction with cards from the ICCD-PDF 2006 database for austenite, martensite and carbides M7C3 and M2C. Tempered samples were characterized using SEM and SEM-FEG. Volume fraction of retained austenite and carbides, as well as changes in the crystal lattices of martensite and austenite are obtained from the X-ray experiments.
- Subjects
HEAT treatment of steel; LOW temperature engineering; TOOL-steel heat treatment; X-ray diffraction; SYNCHROTRONS
- Publication
Tecnologia em Metalurgia, Materiais e Mineração, 2012, Vol 9, Issue 2, p140
- ISSN
2176-1515
- Publication type
Article
- DOI
10.4322/tmm.2012.021