OPTIMIZATION OF HEAT TREATMENT OF CLOSED-DIE FORGINGS OF 2.5% MN STEEL

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F18%3A43953018" target="_blank" >RIV/49777513:23210/18:43953018 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.metalconference.eu/cz/sbornik-metal-2018/" target="_blank" >https://www.metalconference.eu/cz/sbornik-metal-2018/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

OPTIMIZATION OF HEAT TREATMENT OF CLOSED-DIE FORGINGS OF 2.5% MN STEEL

Popis výsledku v původním jazyce

The forging industry seeks ways to improve mechanical properties of forged parts without using costly alloyed steels or complicated and time-consuming post-forge heat treatment. One of the available options is Q&amp;P processing (Quenching and Partitioning) of advanced high-strength martensitic steels. The Q&amp;P process is characterized by rapid cooling from the soaking temperature to a quenching temperature which is between the Ms and the Mf, and subsequent reheating to and holding at a partitioning temperature. Strength levels of more than 2000 MPa and elongation above 10 % can be obtained. Since the quench needs to be interrupted between the Ms and the Mf, new alloying strategies are being developed in order to depress the Mf below 100°C. With such steels, plain quenchants could be used, including boiling water. Using material-technological modelling, several heat treatment routes involving various cooling profiles were tested on three high-strength 2.5 % Mn steels with different Ni and Mo levels. The data for constructing the first model were acquired from a real-world treatment of a forged part. Quenching the forged part in boiling water and subsequent partitioning led to a strength of 2130 MPa and elongation of 12 %. Metallographic examination and measurement of mechanical properties were carried out on the experimental steels after the treatments.

Název v anglickém jazyce

OPTIMIZATION OF HEAT TREATMENT OF CLOSED-DIE FORGINGS OF 2.5% MN STEEL

Popis výsledku anglicky

The forging industry seeks ways to improve mechanical properties of forged parts without using costly alloyed steels or complicated and time-consuming post-forge heat treatment. One of the available options is Q&amp;P processing (Quenching and Partitioning) of advanced high-strength martensitic steels. The Q&amp;P process is characterized by rapid cooling from the soaking temperature to a quenching temperature which is between the Ms and the Mf, and subsequent reheating to and holding at a partitioning temperature. Strength levels of more than 2000 MPa and elongation above 10 % can be obtained. Since the quench needs to be interrupted between the Ms and the Mf, new alloying strategies are being developed in order to depress the Mf below 100°C. With such steels, plain quenchants could be used, including boiling water. Using material-technological modelling, several heat treatment routes involving various cooling profiles were tested on three high-strength 2.5 % Mn steels with different Ni and Mo levels. The data for constructing the first model were acquired from a real-world treatment of a forged part. Quenching the forged part in boiling water and subsequent partitioning led to a strength of 2130 MPa and elongation of 12 %. Metallographic examination and measurement of mechanical properties were carried out on the experimental steels after the treatments.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LO1502" target="_blank" >LO1502: Rozvoj Regionálního technologického institutu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Conference Proceedings - METAL 2018 - 27th International Conference on Metallurgy and Materials

ISBN

978-80-87294-84-0

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

7

Strana od-do

634-640

Název nakladatele

TANGER Ltd., Keltickova 62, 710 00 Ostrava, Czech Republic, EU

Místo vydání

Ostrava

Místo konání akce

Brno, Czech Republic

Datum konání akce

23. 5. 2018

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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