Analysis of Phase Transformation Temperatures of Real Steel Grade

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F17%3A10237331" target="_blank" >RIV/61989100:27360/17:10237331 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of Phase Transformation Temperatures of Real Steel Grade

Popis výsledku v původním jazyce

The paper deals with the study of phase transformation temperatures of two real grade steels. A series of thermal analysis measurements by Differential Thermal Analysis (DTA) and Direct Thermal Analysis (TA) were performed on two real grade medium carbon steel samples in low and high temperature regions. The eutectoid transition tem-perature (TE), end of α-ferrite to γ-austenite transition temperature (Tα→γ), solidus temperature (TS), peritectic tran-sition temperature (TP) and liquidus temperature (TL) were determined. The results were verified by statistic evalu-ation and they were compared with theoretical calculations carried out by InterDendritic Solidification (IDS) and Thermo-Calc™ (2015b, TCFE8; TC) software. The original experimental data of phase transformation temperatures were obtained by thermal analysis. Tempera-tures in low temperature region, the eutectoid transition temperatures and end of α-ferrite to γ-austenite transition temperatures, were determined only by differential thermal analysis method and verified by Thermo-Calc software. It can be said, that differential thermal analysis and Thermo-Calc are more versatile. All experimental values, show in general a high level of consistency and low level of variability. Both differential thermal analysis and direct thermal analysis are set correctly; the results are reproducible and comparable. The standard deviation of the re-sults did not exceed 2 °C and variation coefficient did not exceed 0.3 %. It is not possible to determine only one the most precise software or the one closer to the measured results. Besides one case, the software differed less (or it was equal to) 3 °C from each other. The comparison of thermo-analytical methods and software shows the following: in some cases, exceptional agreement, but in most cases the agreement remains poor. Therefore it is always vital to check the data by an experiment. The experimental temperatures obtained by the thermal analysis are expected to be used to optimize production (casting and solidification) and thermo-mechanical processing of the analysed steel grades.

Název v anglickém jazyce

Analysis of Phase Transformation Temperatures of Real Steel Grade

Popis výsledku anglicky

The paper deals with the study of phase transformation temperatures of two real grade steels. A series of thermal analysis measurements by Differential Thermal Analysis (DTA) and Direct Thermal Analysis (TA) were performed on two real grade medium carbon steel samples in low and high temperature regions. The eutectoid transition tem-perature (TE), end of α-ferrite to γ-austenite transition temperature (Tα→γ), solidus temperature (TS), peritectic tran-sition temperature (TP) and liquidus temperature (TL) were determined. The results were verified by statistic evalu-ation and they were compared with theoretical calculations carried out by InterDendritic Solidification (IDS) and Thermo-Calc™ (2015b, TCFE8; TC) software. The original experimental data of phase transformation temperatures were obtained by thermal analysis. Tempera-tures in low temperature region, the eutectoid transition temperatures and end of α-ferrite to γ-austenite transition temperatures, were determined only by differential thermal analysis method and verified by Thermo-Calc software. It can be said, that differential thermal analysis and Thermo-Calc are more versatile. All experimental values, show in general a high level of consistency and low level of variability. Both differential thermal analysis and direct thermal analysis are set correctly; the results are reproducible and comparable. The standard deviation of the re-sults did not exceed 2 °C and variation coefficient did not exceed 0.3 %. It is not possible to determine only one the most precise software or the one closer to the measured results. Besides one case, the software differed less (or it was equal to) 3 °C from each other. The comparison of thermo-analytical methods and software shows the following: in some cases, exceptional agreement, but in most cases the agreement remains poor. Therefore it is always vital to check the data by an experiment. The experimental temperatures obtained by the thermal analysis are expected to be used to optimize production (casting and solidification) and thermo-mechanical processing of the analysed steel grades.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

20501 - Materials engineering

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)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Hutnické listy

ISSN

0018-8069

e-ISSN

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Svazek periodika

70

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

6

Strana od-do

16-21

Kód UT WoS článku

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EID výsledku v databázi Scopus

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