CONTINUOUS COOLING TRANSFORMATION DIAGRAMS OF HSLA STEEL FOR SEAMLESS TUBES PRODUCTION

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

CONTINUOUS COOLING TRANSFORMATION DIAGRAMS OF HSLA STEEL FOR SEAMLESS TUBES PRODUCTION

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2019

Confidentiality

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

Name of the periodical

Journal of Mining and Metallurgy

ISSN

1450-5339

e-ISSN

—

Volume of the periodical

55

Issue of the periodical within the volume

3

Country of publishing house

RS - THE REPUBLIC OF SERBIA

Number of pages

14

Pages from-to

413-426

UT code for WoS article

000497953000013

EID of the result in the Scopus database

—