Splitting up of non-metallic inclusions in the process of speed melting with laser action

Authors

  • S. I. Gubenko Material Science Department, National Metallurgical Academy of Ukraine, Gagarina Ave., 4, 49600, Dnipro, Ukraine https://orcid.org/0000-0001-5427-1154
  • I. A. Nikulchenko Material Science Department, National Metallurgical Academy of Ukraine, Gagarina Ave., 4, 49600, Dnipro, Ukraine

DOI:

https://doi.org/10.30838/J.PMHTM.2413.250918.34.396

Keywords:

steel, non-metallic inclusions, laser action, melting, splitting

Abstract

Abstract. Purpose. The purpose of this work was to study the fragmentation of non-metallic inclusions in the process of their high-speed melting and crystallization during laser processing. Methodology. Materials for research were industrial steels containing various  non-metallic  inclusions.  Samples  of  various  steels  with  a  pre-polished  surface  were  subjected  to  laser  irradiation  at  the GOS-30M and KVANT-16 installations. Findings. The features of contact melting of non-metallic inclusions under conditions of anomalous  mass  transfer,  which  promotes  the  crushing  of  inclusions  in  the  surface  layer  of  hardened  steel  products,  were investigated. It is shown that crushing of inclusions during laser processing is a factor that determines the level of hardening of steels. Originality. The  study  of  the  processes  of  high-speed  melting  and  solidification  suggests  that  laser  irradiation  is  a  method  of changing the structure and properties of non-metallic inclusions in surface hardened layers of steel products. Practical value. The using of the obtained results will allow us to develop laser processing modes that allow us to influence the size, structure, distribution and content of inclusions in the hardened layers.

Author Biographies

S. I. Gubenko, Material Science Department, National Metallurgical Academy of Ukraine, Gagarina Ave., 4, 49600, Dnipro

Dr. Sc. (Tech.), Prof.

I. A. Nikulchenko, Material Science Department, National Metallurgical Academy of Ukraine, Gagarina Ave., 4, 49600, Dnipro

Postgrad.Stud.

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Published

2018-09-25