Szczegóły publikacji
Opis bibliograficzny
The influence of the kinetics of phase transformations during tempering on the microstructure development in tool steel with different carbon content / BAŁA Piotr // W: Metal 2013 : 22nd international conference on Metallurgy and materials : May 15th–17th 2013, Brno : conference proceedings / TANGER Ltd., [et al.]. — Ostrava : TANGER Ltd., 2013. — ISBN: 978-80-87294-41-3. — S. 113. — Pełny tekst W: Metal 2013 [Dokument elektroniczny] : 22ndinternational conference on Metallurgy and materials : May 15th–17th, Brno : conference METAL 2013 proceedings. — Wersja do Windows. — Dane tekstowe. — [Czech Republic] : TANGER Ltd., cop. 2013. — 1 dysk optyczny. — S. [1–6]. — Wymagania systemowe: Adobe Reader ; napęd CD-ROM. — Tytuł przejęto ze s. tyt. — Bibliogr. s. [6], Abstr. — ISBN 978-80-87294-39-0. — W bazie Web of Science wersja drukowana. — ISBN 978-80-87294-41-3. — S. 689-694
Autor
Dane bibliometryczne
| ID BaDAP | 73725 |
|---|---|
| Data dodania do BaDAP | 2013-05-22 |
| Rok publikacji | 2013 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
| Konferencja | 22nd International Conference on Metallurgy and Materials |
Abstract
This work contains a detailed description of the kinetics of phase transformations occurring during tempering of two Cr-Mo-V tool steel with different carbon content (0.37 and 1.22 %). The temperature ranges of the phase transformations occurring during heating from the as-quenched state (tempering) were determined from dilatometric tests. An interpretation of dilatograms of heating from the as-quenched state was also presented. The temperature ranges of the observed transformations during tempering of investigated steel were presented on CHT (Continuous Heating Transformations) diagrams. Moreover, the microstructure development in tested samples, reflecting extend of the phase transformations during tempering, was discussed too. The change in microstructure of the investigated steels during heating from the as-quenched state results from precipitation of epsilon and M3C carbides, and transformation of different amount of retained austenite to tempered martensite. The most preferential sites for precipitation of cementite are martensite laths boundaries, indicating that its nucleation is independent. It was also noticed, that precipitation of cementite takes place only when precipitations of metastable epsilon carbide are present in the microstructure. The morphology of the obtained microstructures is similar to that of upper bainite, suggesting that it is a likely reason for a tempered brittleness. Precipitation of MC and M2C type alloy carbides have not been detected although the investigated steels molybdenum and vanadium, and 0.37 or 1.22 % carbon contain.
