Due to the limited solubility of individual elements in the crystal lattice of steel, an enrichment of the residual melt and furthermore a formation of micro and macro segregates will appear during solidification of the steel melt. Depending on the chemical composition of the steel, the operation parameters of the casting plant and the slab dimension, the segregates will be formed with different intensities. The knowledge of the segregation effects is imperative for further processing of slabs and the subsequent products. The electron probe micro analyser (EPMA) makes feasible an objective assessment of the segregates due to solidification over the entire slab thickness. This is carried out by concentration mapping (CM), which is a method for the quantitative determination of element distributions over certain areas on the sample. In this paper some results taken from an investigation on steel grade 13 CrMo 4-5 are presented, and some casting technological measures derived from these results are proposed.
Quantitative Bewertung der Seigerung inStrangguBbrammen mit Elektronenstrahlmikroanalyse. Bedingt durch die begrenzte L6slichkeit einzelner Elemente im Kristallgitter des Stahles kommt es bei der Erstarrung zur Anreicherung der Restschmelze und im weiteren zur Mikro-und Makroseigerung. Abhii.ngig von der Stahlzusammensetzung, den GieBparametern, der GieBanlage und dem Brammenformat sind die Seigerungen unterschiedlich stark ausqspraqt. Ein quantitatives Wissen Ober die Seigerungen ist daher fOr die Weiterverarbeitung der Brammen und der hergestellten Produkte eine zwingende Notwendigkeit. Die Mikrosonde erm6glicht es, eine quasiobjektive, mikroanalytische Beurteilung der Prlrnarstruktur Ober die Brammendicke durchzutuhreno Dies erfolgt mit Hilte einer quantitativen Bestimmung einzelner Elemente Ober vorgegebene Flachen (Concentration Mapping). Untersuchungsergebnisse und die daraus abzuleitenden MaBnahmen werden am Beispiel der Stahlsorte 13CrM04-5 srlautert.abstract d
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.