K. Sobotková’s scientific contributions

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Publications (1)


Influence of selected rare earth metals on structural characteristics of 42CrMo4 steel
  • Article

January 2016

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10 Citations

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K. Sobotková

The influence of rare earth metals (REM) addition on solidification structure of the low-carbon 42CrMo4 steel was investigated. Alloys were prepared by means of a centrifugal casting. The addition of cerium, praseodymium or mischmetal in the steel produced greatly improved solidification structure with a suppressed columnar grain zone, finer grain size in the equiaxed grain zone. The additions occurred in the steel bath in the form of REM oxide and/or oxide-sulphide inclusions and as dissolved REM segregated along with other elements at prior grain boundaries and interdendritic spaces. Microstructure (light microscope), SEM/EDX chemical microanalysis, and TOF-SIMS analysis – mapping of elements in the structure of alloys were obtained.

Citations (1)


... The chemical composition of this steel, determined by the BULK GDOES method using a Spectruma Analytik GMBH (Hof, Germany) glow discharge optical emission spectrometer (GDOES) under 700 V and 35 mA excitation conditions [34,35], is presented in Table 1. The elements marked with an asterisk are determined through elemental analysis using an Eltra (Haan, Germany) CS 2000 combustion analyzer [36,37]. Depending on the chemical composition of the steel, the temperature of the galvanizing bath, the composition of the bath, the dwell time in the bath, the surface quality and wall thickness of the galvanized material, and the method and rate of cooling, a coating composed of different Fe-Zn intermetallic compounds is formed [22]. ...

Reference:

Low-Carbon Steel Formed by DRECE Method with Hot-Dip Zinc Galvanizing and Potentiodynamic Polarization Tests to Study Its Corrosion Behavior
Influence of selected rare earth metals on structural characteristics of 42CrMo4 steel
  • Citing Article
  • January 2016