Erosion of runners in ingot casting
2009 (English)In: AISTech - Iron and Steel Technology Conference Proceedings, 2009, 1077-1087 p.Conference paper (Refereed)
Substantial erosion of the runner, especially the horizontal runner was noticed during casting. CFD simulation of the flow showed that the velocities were almost zero close to the centre stone and end stone. The low velocities well explained the minor erosion of the two types of stones. The CFD calculation also indicated that the velocities in the horizontal were not evenly distributed. Velocities as high as 3 m/s could be found at the entrance of the horizontal runner and close to the entrance of the ingot. This result was in good agreement with the experimental observation that the erosion close to the entrance of the horizontal runner was much more profound. The runner surface was found to react with the dissolved aluminium forming a layer of higher alumina content. The zigzag surface of the refractory could entrap inclusions and provide good condition for agglomeration. The detachment of the agglomerated inclusions along with the pieces of refractory could be an important source of the formation of macro inclusions during casting. The higher alumina contents in the inclusions found in the steel rod in comparison with that found in the ladle suggested possible reoxidation of the steel during casting.
Place, publisher, year, edition, pages
2009. 1077-1087 p.
Erosion; Ingot casting; Non-metallic inclusions; Runner; Tool steel
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-13387ScopusID: 2-s2.0-70349923896OAI: oai:DiVA.org:kth-13387DiVA: diva2:325029