Publication detail

The model of temperature field and chemical heterogeneity of solidifying ductile-cast-iron roller

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

Czech title

Model teplotního pole a chemické heterogenity tuhnoucího válce z tvárné litiny

English title

The model of temperature field and chemical heterogeneity of solidifying ductile-cast-iron roller

Type

journal article - other

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. It is therefore necessary to find and ensure optimal relationships between the matrix structure and the resultant values of the mechanical properties of the rollers in order to maximize the length of life. The requirements introduced here 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 kinetics of the solidification has a measurable and non-negligible influence on the chemical and structural heterogeneity of the investigated type of cast-iron. Tying on to the results of the model of the temperature field of the cast rollers, an original methodology was developed for the measurement of chemical microheterogeneity.

Czech abstract

Kvalita pracovních válců užívaných pro válcování různých profilů je určena chemickým a strukturálním složením materiálu válců a výrobní technologií. Je proto nutné najít a zajistit optimální vztah mezi strukturou matrice a výslednými hodnotoami mechanických vlastností válců s cílem maximálně zvýšit jejich životnost. Uvedené požadavky nelze zajistit bez dokonalé znalosti průběhu tuhnutí, chladnutí a tepelného zpracování odlitých válců, jakož i kinetiky teplotního pole odlitku a kokily. Kinetika tuhnutí má měřitelný a významný vliv na chemickou a strukturní heterogenitu zkoumané tvárné litiny. V návaznosti na výsledky modelu teplotního pole odlévaných válců byla proto vypracována původní metodika měření chemické mikroheterogenity.

English 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. It is therefore necessary to find and ensure optimal relationships between the matrix structure and the resultant values of the mechanical properties of the rollers in order to maximize the length of life. The requirements introduced here 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 kinetics of the solidification has a measurable and non-negligible influence on the chemical and structural heterogeneity of the investigated type of cast-iron. Tying on to the results of the model of the temperature field of the cast rollers, an original methodology was developed for the measurement of chemical microheterogeneity.

Keywords in Czech

tvárná litina, válce, tuhnutí, teplotní pole, chemická heterogenita, numerické modely

Keywords in English

ductile-cast iron,roller, solidifying, temperature field, chemical heterogeneity, numerical models

RIV year

2008

Released

11.11.2008

Publisher

Ocelot s.r.o

Location

Ostrava

ISSN

0018-8069

Journal

Hutnické listy

Volume

LXI

Number

6

Pages from–to

37–46

Pages count

10

BIBTEX


@article{BUT48879,
  author="Karel {Stránský} and František {Kavička} and Jana {Dobrovská} and Bohumil {Sekanina} and Josef {Štětina},
  title="The model of temperature field and chemical heterogeneity of solidifying ductile-cast-iron roller",
  journal="Hutnické listy",
  year="2008",
  volume="LXI",
  number="6",
  month="November",
  pages="37--46",
  publisher="Ocelot s.r.o",
  address="Ostrava",
  issn="0018-8069"
}