A Study of the Oscillation Marks’ Characteristics of Continuously Cast Incoloy Alloy 825 Blooms
2016 (English)In: Metallurgical and Materials Transactions. A, ISSN 1073-5623, E-ISSN 1543-1940, Vol. 47, no 8, 4068-4079 p.Article in journal (Refereed) Published
A comprehensive experimental study of oscillation mark (OM) formation and its characteristics during the solidification of Incoloy alloy 825 in the continuous casting of blooms is investigated by plant trials and metallographic study. The experiments involved two heats with the same casting and mold conditions and sampling at different locations across the strand. The metallographic study combined macro/micro-examinations of OMs and segregation analysis of Cr, Mn, Mo, Ni, and Si by microprobe analysis. The results show that OMs have widely different characteristics, such as mark type, depth, segregation, and accompanying microstructure. Furthermore, the mark pitch can vary considerably even for the similar casting conditions, leading to different conditions for the marks’ formation in relation to the mold’s cyclic movement. Finally, a mechanism for the OM formation is discussed and proposed. Possible solutions for minimizing the observed defects by optimizing the mold conditions are suggested.
Place, publisher, year, edition, pages
Springer Publishing Company, 2016. Vol. 47, no 8, 4068-4079 p.
Incoloy alloy 825, continuous casting, bloom, oscillations marks, microstructure, microsegregation, cracks, statistical analysis
Other Materials Engineering
Research subject Materials Science and Engineering
IdentifiersURN: urn:nbn:se:kth:diva-187818DOI: 10.1007/s11661-016-3582-8ISI: 000379494700027ScopusID: 2-s2.0-84978160768OAI: oai:DiVA.org:kth-187818DiVA: diva2:931688
ProjectsReduction of oscillation marks formation
FunderSwedish Energy Agency
QC 201605302016-05-302016-05-302016-08-15Bibliographically approved