CONTINUOUS COOLING TRANSFORMATION DIAGRAMS OF HSLA STEEL FOR SEAMLESS TUBES PRODUCTION

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F19%3A10243033" target="_blank" >RIV/61989100:27360/19:10243033 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.doiserbia.nb.rs/img/doi/1450-5339/2019/1450-53391900031S.pdf" target="_blank" >http://www.doiserbia.nb.rs/img/doi/1450-5339/2019/1450-53391900031S.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2298/JMMB181217031S" target="_blank" >10.2298/JMMB181217031S</a>

Jazyk výsledku

angličtina

Název v původním jazyce

CONTINUOUS COOLING TRANSFORMATION DIAGRAMS OF HSLA STEEL FOR SEAMLESS TUBES PRODUCTION

Popis výsledku v původním jazyce

The CCT and two DCCT diagrams were constructed for the HSLA steel containing Cr, V, Nb, and N microadditions, taking into account industrial processing parameters of this material in a seamless tubes rolling mill. The typical finish hot rolling temperature of 1173 K was used for the construction of the standard CCT diagram and the effect of previous austenite deformation at this temperature was evaluated in the DCCT diagram. Another DCCT diagram was developed after heating at 1553 K, followed by plastic deformation at 1173 K. The prior austenite grain size in the hot rolled material after heating at 1173 K was approx. 10 mu m, the heating of the as-cast material at 1553 K resulted in the prior austenite grain size over 200 mu m. The effect of the previous austenite deformation after low-temperature heating on the CCT diagram was negligible. The high-temperature heating showed a great influence on the austenite decomposition processes. The Ferrite-start temperature was significantly reduced at high cooling rates and the preferred decomposition of coarse grained austenite to acicular ferrite suppressed the bainite transformation at medium cooling rates. The developed DCCT diagrams can be used for the prediction of austenite decomposition products during the cooling of the seamless tubes from the finish rolling temperature. The CCT diagram can be utilized for the quality heat treatment of tubes.

Název v anglickém jazyce

CONTINUOUS COOLING TRANSFORMATION DIAGRAMS OF HSLA STEEL FOR SEAMLESS TUBES PRODUCTION

Popis výsledku anglicky

The CCT and two DCCT diagrams were constructed for the HSLA steel containing Cr, V, Nb, and N microadditions, taking into account industrial processing parameters of this material in a seamless tubes rolling mill. The typical finish hot rolling temperature of 1173 K was used for the construction of the standard CCT diagram and the effect of previous austenite deformation at this temperature was evaluated in the DCCT diagram. Another DCCT diagram was developed after heating at 1553 K, followed by plastic deformation at 1173 K. The prior austenite grain size in the hot rolled material after heating at 1173 K was approx. 10 mu m, the heating of the as-cast material at 1553 K resulted in the prior austenite grain size over 200 mu m. The effect of the previous austenite deformation after low-temperature heating on the CCT diagram was negligible. The high-temperature heating showed a great influence on the austenite decomposition processes. The Ferrite-start temperature was significantly reduced at high cooling rates and the preferred decomposition of coarse grained austenite to acicular ferrite suppressed the bainite transformation at medium cooling rates. The developed DCCT diagrams can be used for the prediction of austenite decomposition products during the cooling of the seamless tubes from the finish rolling temperature. The CCT diagram can be utilized for the quality heat treatment of tubes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

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

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Mining and Metallurgy

ISSN

1450-5339

e-ISSN

—

Svazek periodika

55

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

RS - Srbská republika

Počet stran výsledku

14

Strana od-do

413-426

Kód UT WoS článku

000497953000013

EID výsledku v databázi Scopus

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