Original scientific paper

Study on clogging mechanism of submerged entry nozzle of steel 38CrMoAl

Z. Y. Xu ; School of Materials and Metallurgy, University of Science and Technology Liaoning, China
J. H. Liu ; School of Materials and Metallurgy, University of Science and Technology Liaoning, China
Z. J. He ; School of Materials and Metallurgy, University of Science and Technology Liaoning, China
Q. H. Pang ; School of Materials and Metallurgy, University of Science and Technology Liaoning, China

Abstract

By phase analysis of the clog of nozzle and type analysis of inclusion in 38CrMoAl steel, the effects of calcium treatment on nozzle scabbiness were analyzed and the mechanisms of clogging were discussed. The results indicated that the clogs of nozzle consist of Al₂O₃, MgO• Al₂O₃, CaS and calcium aluminate mixture, Because the inclusion in molten steel with high melting point aggregating in nozzle inner wall. Clogging has been caused by high sulfur content of steel liquid, irrelevant refining slag system and excessive calcium treatment. The nozzle clogging was analyzed and some measures were put forward.

Keywords

38CrMoAl; calcium treatment; inclusion; nozzle clogging; X-Ray Diffraction (XRD)

Hrčak ID:

189369

URI

https://hrcak.srce.hr/189369

Publication date:

1.1.2018.

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