Influence of intense ingot cooling on its macrostructural and chemical heterogeneity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F17%3A10238314" target="_blank" >RIV/61989100:27360/17:10238314 - 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

Influence of intense ingot cooling on its macrostructural and chemical heterogeneity

Popis výsledku v původním jazyce

The technology of intensive cooling of steel cast into molds has been tested. The project solution was divided into two parts. Two ingots of the same type were cast. The cast steel had the same chemical composition, temperature and casting speed in both cases. For both ingots, the macrostructural and chemical heterogeneity of the cast steel was compared in four zones in a longitudinal axial section and three cross sections along the height of the ingot. The evaluated macrostructures show that the influence of the intense cooling has manifested itself greatly in the base of the ingot where the zone of coarse, differently oriented crystals has grown. An analysis of the macro-structure of the cooled and non-cooled ingot further shows that the lower part of the cooled ingot has increased the incidence of porosity and, on the contrary, it has significantly reduced in the upper part of the ingot. In addition, it has been found that intensive heat removal during ingot casting and solidification has a major effect on reducing the decomposition of the C, Cr and Mo elements. The calculation of the heat balance showed that approximately by 20% more heat was removed from the chilled ingot than that of the uncooled ingot. The highest increase in heat output was found at the bottom of the ingot.

Název v anglickém jazyce

Influence of intense ingot cooling on its macrostructural and chemical heterogeneity

Popis výsledku anglicky

The technology of intensive cooling of steel cast into molds has been tested. The project solution was divided into two parts. Two ingots of the same type were cast. The cast steel had the same chemical composition, temperature and casting speed in both cases. For both ingots, the macrostructural and chemical heterogeneity of the cast steel was compared in four zones in a longitudinal axial section and three cross sections along the height of the ingot. The evaluated macrostructures show that the influence of the intense cooling has manifested itself greatly in the base of the ingot where the zone of coarse, differently oriented crystals has grown. An analysis of the macro-structure of the cooled and non-cooled ingot further shows that the lower part of the cooled ingot has increased the incidence of porosity and, on the contrary, it has significantly reduced in the upper part of the ingot. In addition, it has been found that intensive heat removal during ingot casting and solidification has a major effect on reducing the decomposition of the C, Cr and Mo elements. The calculation of the heat balance showed that approximately by 20% more heat was removed from the chilled ingot than that of the uncooled ingot. The highest increase in heat output was found at the bottom of the ingot.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

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

3

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

11

Strana od-do

47-57

Kód UT WoS článku

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EID výsledku v databázi Scopus

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