Stabilization of Retained Austenite in High-Strength Martensitic Steels with Reduced Ms Temperature

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Stabilization of Retained Austenite in High-Strength Martensitic Steels with Reduced Ms Temperature

Popis výsledku v původním jazyce

Today's advanced steels are required to possess high strength and ductility. One way of achieving a favourable ductility level and a very high ultimate strength is to stabilise retained austenite in martensitic matrix. Among heat treatment processes capable of producing such microstructure, there is the Q&P proces (Quenching and Partitioning). It can produce microstructures consisting of martensite and a certain amount of retained austenite, which exhibit strengths above 2000MPa and elongation levels of10-15%. For some processes, it is appropriate to depress the Ms and Mf temperatures and modify the ferritic and pearlitic transformations to occur at lower cooling rates. By choosing an appropriate steel chemistry, the retained austenite can be stabilized in martensitic matrix at lower temperatures than in the ordinary Q&P process. Four steels were selected for the present experimental programme. Several heat treatment sequences were tried with these steels and multiple parameters were

Název v anglickém jazyce

Stabilization of Retained Austenite in High-Strength Martensitic Steels with Reduced Ms Temperature

Popis výsledku anglicky

Today's advanced steels are required to possess high strength and ductility. One way of achieving a favourable ductility level and a very high ultimate strength is to stabilise retained austenite in martensitic matrix. Among heat treatment processes capable of producing such microstructure, there is the Q&P proces (Quenching and Partitioning). It can produce microstructures consisting of martensite and a certain amount of retained austenite, which exhibit strengths above 2000MPa and elongation levels of10-15%. For some processes, it is appropriate to depress the Ms and Mf temperatures and modify the ferritic and pearlitic transformations to occur at lower cooling rates. By choosing an appropriate steel chemistry, the retained austenite can be stabilized in martensitic matrix at lower temperatures than in the ordinary Q&P process. Four steels were selected for the present experimental programme. Several heat treatment sequences were tried with these steels and multiple parameters were

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2015 24th International Conference on Metallurgy and Materials

ISBN

978-80-87294-62-8

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

499-504

Název nakladatele

TANGER spol. s r. o.

Místo vydání

Ostrava

Místo konání akce

Hotel Voronez I, Brno, Czech Republic, EU

Datum konání akce

3. 6. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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