Publication detail

Numerical and experimental investigation of temperature field of solidifying massive ductile-cast-iron roller

KAVIČKA, F. STRÁNSKÝ, K. SEKANINA, B. DOBROVSKÁ, J. ŠTĚTINA, J.

English title

Numerical and experimental investigation of temperature field of solidifying massive ductile-cast-iron roller

Type

Peer-reviewed article not indexed in WoS or Scopus

Language

en

Original abstract

The quality of the working rollers used for rolling rails of different profiles is determined by the chemical and structural composition of the material of the rollers and the production technology The requirements of the quality cannot be ensured without perfect knowledge of the course of solidification, cooling and heat treatment of the cast rollers as well as the kinetics of the temperature field of the casting and mould. The solidification and cooling of ductile-cast-iron roller in metal and non metal mold is a very complicated problem of heat and mass transfer with a phase and structural changes described by the Fourier equation. An original application of ANSYS simulated the forming of the temperature field of the entire system comprising the casting, the mold and ambient. The simulation of the release of the latent heats of phase or structural changes is carried out by introducing the thermodynamic enthalpy function. In the experimental investigation of temperature field, an original methodology for the measurement of the distribution of temperatures and heat flows in the roller-mould system had been developed and verified in the operation. In the design of the original procedure, there were a number of problems connected with the great size of the roller and mould, uneven dilatation of the solidifying roller and mould, the installation and insulation of the thermocouples, the wiring of the thermocouple system, etc. The findings regarding the kinetics of the temperature field of the roller and mould, obtained from experimental research, were used for determining the boundary conditions and for the verification of the numerical simulation program. The calculation of the temperature field focused on the analysis of the effect of the mould separator on the course of solidification of the roller. The results of the mathematical modelling indicate that the distribution of temperatures and the solidification in the vertical direction is significantly uneven, this has an effect on the internal quality of the casting.

Keywords in English

Ductile cast iron, massive roller, solidification, temperature field, numerical model

Released

2012-05-15

Publisher

IMT Ljubljana

Location

Ljubljana Slovinsko

ISSN

1580-2949

Volume

46 (2012)

Number

4

Pages from–to

321–324

Pages count

4

BIBTEX


@article{BUT92341,
  author="František {Kavička} and Karel {Stránský} and Bohumil {Sekanina} and Jana {Dobrovská} and Josef {Štětina}",
  title="Numerical and experimental investigation of temperature field of solidifying massive ductile-cast-iron roller",
  journal="Materiali in Tehnologije",
  year="2012",
  volume="46 (2012)",
  number="4",
  pages="321--324",
  issn="1580-2949"
}