Influence of chemical composition and dendritic structure of continuous casting on the heterogeneous effects in rolled steel. Background

Authors

  • E. V. Parusov Iron and Steel Institute of NAS Ukraine, Dnepropetrovsk, Ukraine
  • O. B. Sychkov Nosov Magnitogorsk State Technical University, Magnitogorsk, Russian Federation
  • S. I. Gubenko The National Metallurgical Academy of Ukraine, Dnipropetrovsk, Ukraine
  • L. V. Sahura Iron and Steel Institute of NAS Ukraine, Dnepropetrovsk, Ukraine

DOI:

https://doi.org/10.31498/2225-6733.32.2016.83606

Keywords:

continuous casting, dendritic structure, segregation, chemical composition, rolled wire

Abstract

Cast metal structure hereditary influence on the properties of finished products is an important issue. To improve the quality of rolled wire it is necessary to obtain continuous casting specimen with the maximum possible length of the zone of equiaxial crystals, dispersed centerline segregation, centerline porosity being welded in the process of hot plastic deformation. Objective. To investigate the continuous casting specimen dendritic structure influence on structure formation in rolled wire associated with the segregation phenomena. Methods. The research was carried out on the industrial continuous casting lots with the initial cross section of 125´125 mm from C82D and C86D steels and 11,0 mm in the ready-made diameter. The optical light microscope «Axiovert 200 M MAT» and the binocular microscope «MBI-2» were used. Results. The formation of dendritic structures is most favorable if electromagnetic mixing (EMM) technology is used. In the rolled steel products, made at continuous casting with EMM, there is a tendency to spreading segregation and structural banding, as well as a decrease in the width of martensitic areas. Conclusions. The positive effect of electromagnetic mixing on the reduction in the width of martensitic areas in rolled wire, as well as on the change in the length of the various zones of the dendritic structure in cross-section continuous casting specimen has been established. Segregation increases when the steel is alloyed

Author Biographies

E. V. Parusov, Iron and Steel Institute of NAS Ukraine, Dnepropetrovsk

Кандидат технічних наук, старший науковий співробітник

O. B. Sychkov, Nosov Magnitogorsk State Technical University, Magnitogorsk

Доктор технічних наук, професор

S. I. Gubenko, The National Metallurgical Academy of Ukraine, Dnipropetrovsk

Доктор технічних наук, професор

L. V. Sahura, Iron and Steel Institute of NAS Ukraine, Dnepropetrovsk

Кандидат технічних наук, старший науковий співробітник

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How to Cite

Parusov, E. V., Sychkov, O. B., Gubenko, S. I., & Sahura, L. V. (2016). Influence of chemical composition and dendritic structure of continuous casting on the heterogeneous effects in rolled steel. Background. Reporter of the Priazovskyi State Technical University. Section: Technical Sciences, (32), 61–71. https://doi.org/10.31498/2225-6733.32.2016.83606

Issue

No. 32 (2016): Reporter of the Priazovskyi State Technical University. Section: Technical sciences

Section

Materials science

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