This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Modified Martempering and its Effect on the Impact Toughness of a Cold Work Tool Steel
Technical Paper
2011-36-0325
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
The so-called Modified Martempering discussed in this work differs from the standard martempering by that the temperature of the quenching bath is below the Ms point. In spite of the fact the lower temperature increases the severity of quenching, this also usually avoids the bainite formation, and by this reason, it is possible to make a fair comparison between different processes, which result in different microstructures. The present study shows the results in terms of mechanical properties, impact resistance in special of a cold work tool steel class, after being heat treated by the isothermal modified martempering process, as well as a comparison with the conventional quenching and tempering process and the austempering as well. A study to understand the bainitic microstructural transformation evolution has also been accomplished, gradually increasing the time of permanence in the bainitic transformation zone, verifying the gradual increase of the bainite fraction until the total transformation. At the end, microhardness and impact tests have been performed even in the austempering, modified martempering and tempered, and quenching and tempered samples, making possible to check the interaction between microstructure and impact toughness at the same hardness range.
Recommended Content
Authors
Citation
dos Santos Filho, D., Goldenstein, H., and Vatavuk, J., "The Modified Martempering and its Effect on the Impact Toughness of a Cold Work Tool Steel," SAE Technical Paper 2011-36-0325, 2011, https://doi.org/10.4271/2011-36-0325.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
1 | ||
2 |
Also In
References
- SAE Society of Automotive Engineers International SAE 1989 HANDBOOK 7-02 7.08 SAE International 1989
- ASM International ASM Handbook, v. 4: Heat Treating Materials Park ASM International 1991
- SMITH, W. F. Princípios de ciência e engenharia de materiais Lisboa McGraw-Hill 1998
- GOLDENSTEIN, Helio Bainita nos aços Bott, Ivani Rios, Paulo Paranhos, Ronaldo Aços: Perspectivas para os próximos 10 anos, v. unico 77 88 Rio de Janeiro Ivani Bott 2002
- HULTGREN, A. J.Iron Steel Inst. 114 421 Iron Steel Inst. 1926
- ROBERTSON, J.M. J.Iron Steel Inst. 119 391 Iron Steel Inst. 1929
- DAVENPORT, E.S. BAIN, E.C. Trans. AIME 90 AIME 1930
- HILLERT, M. PURDY, G.R. On the misuse of the term bainite Scripta Mat. 43 2000
- MEHL, R.F. Trans. AIME 105 255 AIME 1933
- SANTOS FILHO, Dinecio Otimização da tenacidade ao impacto de um aço ferramenta pela determinação do ciclo ideal de tratamento térmico São Paulo Universidade Mackenzie 2008
- HONEYCOMBE, R.W.K. Steels - Microstructure and Properties 2 U.K. Halsted Pr 1996
- VATAVUK, Jan CANALE, L.C.F. Failure Analysis of Heat Treated Steel Components 285 309 ASM The Materials Information Society 2008
- SPEICH, G.R. LESLIE, W.C. Tempering of Stee. Metall. Trans. 3 5 1043 1054 1972
- ASM International ASM Heat Treater's Guide Materials Park ASM International 1991
- NBR 6672 Ensaio de Dureza Vickers ABNT Rio de Janeiro 1981
- ASTM ASTM D 256-06a: Standard Test Methods for Determining the Izod Pendulum Impact Resistance West Conshohocken ASTM International 2007
- KEOUGH, J.R. LAIRD, W.J. Junior Austempering of Steel ASM International 1991