THE INFLUENCE OF THE NITRIDED LAYER DEPTH IN THE ROOT OF V-NOTCH TO NOTCH TOUGHNESS OF 30CRMOV9 STEEL

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60162694%3AG43__%2F15%3A00530736" target="_blank" >RIV/60162694:G43__/15:00530736 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.metal2015.com/cz/" target="_blank" >http://www.metal2015.com/cz/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

THE INFLUENCE OF THE NITRIDED LAYER DEPTH IN THE ROOT OF V-NOTCH TO NOTCH TOUGHNESS OF 30CRMOV9 STEEL

Popis výsledku v původním jazyce

The aim of this work is to describe the influence of plasma nitride layers with different case depths which were created in the root of V-notches to notch toughness of 30CrMoV9 steel. The different case depths of nitride layers were achieved by three nitriding processes at temperatures 450 °C, 500 °C and 550 °C. Duration of nitriding process was chosen with regard to the achievement of uniform depth layer on steel surface because determination the final depth of the root of the V-notch is difficult. Chemical composition of steel was verified by GDOES/Bulk method using the LECO SA 2000 device. The experimental works were realized on V-notch samples of size 10x10x55 mm (according to CSN ISO 148-1 standard). The notch toughness tests of steel were carried out using the instrumental Charpy hammer at temperatures -40 °C, +21 °C and + 70 °C. Thickness and microhardness of plasma nitrided layers was evaluated using the automatic microhardness LECO M-400-H device. The metallography was aslo evaluated using a light microscope OLYMPUS GX51. The results of experiments showed that plasma nitriding process has a direct impact on the change of notch toughness parameters. The notch toughness of plasma nitrided steel was decreased. The primary influence on the notch toughness has the case depth of the nitrided layer at the root of the V-notch. The measurements thereinafter showed that the notch toughness values at low temperature (-40 °C) decreased but at higher temperature (+70 °C) decreased too.

Název v anglickém jazyce

THE INFLUENCE OF THE NITRIDED LAYER DEPTH IN THE ROOT OF V-NOTCH TO NOTCH TOUGHNESS OF 30CRMOV9 STEEL

Popis výsledku anglicky

The aim of this work is to describe the influence of plasma nitride layers with different case depths which were created in the root of V-notches to notch toughness of 30CrMoV9 steel. The different case depths of nitride layers were achieved by three nitriding processes at temperatures 450 °C, 500 °C and 550 °C. Duration of nitriding process was chosen with regard to the achievement of uniform depth layer on steel surface because determination the final depth of the root of the V-notch is difficult. Chemical composition of steel was verified by GDOES/Bulk method using the LECO SA 2000 device. The experimental works were realized on V-notch samples of size 10x10x55 mm (according to CSN ISO 148-1 standard). The notch toughness tests of steel were carried out using the instrumental Charpy hammer at temperatures -40 °C, +21 °C and + 70 °C. Thickness and microhardness of plasma nitrided layers was evaluated using the automatic microhardness LECO M-400-H device. The metallography was aslo evaluated using a light microscope OLYMPUS GX51. The results of experiments showed that plasma nitriding process has a direct impact on the change of notch toughness parameters. The notch toughness of plasma nitrided steel was decreased. The primary influence on the notch toughness has the case depth of the nitrided layer at the root of the V-notch. The measurements thereinafter showed that the notch toughness values at low temperature (-40 °C) decreased but at higher temperature (+70 °C) decreased too.

Druh

D - Stať ve sborníku

CEP obor

KA - Vojenství

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

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

9

Strana od-do

1093-1101

Název nakladatele

TANGER Ltd.

Místo vydání

Brno, Czech Republic

Místo konání akce

Brno, Czech Republic

Datum konání akce

3. 6. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000374706100176