CRYOGENIC AND STRESS RELIEF THERMAL TREATMENTS IN AN AISI D2 STEEL
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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia, Materiais e Mineração
2012-06-01
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| Series: | Tecnologia em Metalurgia, Materiais e Mineração |
| Subjects: | |
| Online Access: | http://www.tecnologiammm.com.br/files/v9n2/v9n2a09.pdf |
| Summary: | 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 M7C3and 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. |
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| ISSN: | 2176-1515 2176-1523 |