Publication detail

Two Numerical Models of the Solidification Structure of Massive Ductile Cast-Iron Casting

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

Czech title

Dva numerické modely struktury tuhnutí masivních odlitlů z tvárné litiny

English title

Two Numerical Models of the Solidification Structure of Massive Ductile Cast-Iron Casting

Type

journal article in Web of Science

Language

en

Original abstract

An original three-dimensional (3D) model of solidification is used to describe the process of solidification and cooling of massive 500x1000x500 mm cast-iron castings. The castings were cast in sand moulds. The calculated mode of the kinetics of the temperature field of the casting was verified during casting with temperature measurements in selected points. The experimental samples – 15 mm in diameter and 12 mm high – are metallographically analysed and also in terms of heterogeneity of the chemical composition. It was founded that the given basic characteristics of the structure of the cast iron are directly proportional to the logarithm of the local solidification time. The original spatial model of solidification can therefore be used in its first approximation for the assessment of the pouring structure of massive cast iron castings. This paper creates the starting point for the estimation of the local mechanical properties and fracture behaviour of massive ductile cast iron castings.

Czech abstract

Originální 3D model tuhnutí je použit pro popis procesu tuhnutí a chlazení masivního odlitku z tvárné litiny (500x1000x500 mm) odlévaném v pískové formě. Výsledky výpočtu teplotního pole odlitku byly porovnány s měřením teplot ve vybraných místech. Experimentální vzorky -průměr 15 mm, výška 12 mm – jsou analyzovány metalograficky i z hlediska chemického složení. Bylo zjištěno, že základní charakteristiky struktury tvárné litiny jsou přímo úměrné logaritmu lokální doby tuhnutí. Originální prostorový model tuhnutí může být proto použit jako první aproximace pro stanovení licí struktury masivního odlitku z šedé litiny. Příspěvek je úvodem pro určení místních mechanických vlastností a chování těchto odlitků při tvorbě trhlin.

English abstract

An original three-dimensional (3D) model of solidification is used to describe the process of solidification and cooling of massive 500x1000x500 mm cast-iron castings. The castings were cast in sand moulds. The calculated mode of the kinetics of the temperature field of the casting was verified during casting with temperature measurements in selected points. The experimental samples – 15 mm in diameter and 12 mm high – are metallographically analysed and also in terms of heterogeneity of the chemical composition. It was founded that the given basic characteristics of the structure of the cast iron are directly proportional to the logarithm of the local solidification time. The original spatial model of solidification can therefore be used in its first approximation for the assessment of the pouring structure of massive cast iron castings. This paper creates the starting point for the estimation of the local mechanical properties and fracture behaviour of massive ductile cast iron castings.

Keywords in Czech

tvárná litina, doba tuhnutí, segregace, strukturální charakteristika, model

Keywords in English

ductile cast-iron, solidification time, segregation, structural characteristics, model

RIV year

2010

Released

12.04.2010

Publisher

IMT Ljubljana

Location

Ljubljana, Slovenija

ISSN

1580-2949

Journal

Materiali in tehnologije

Volume

44

Number

2

Pages from–to

93–98

Pages count

6

BIBTEX


@article{BUT49253,
  author="Karel {Stránský} and Jana {Dobrovská} and František {Kavička} and Bohumil {Sekanina} and Josef {Štětina},
  title="Two Numerical Models of the Solidification Structure of Massive Ductile Cast-Iron Casting",
  journal="Materiali in tehnologije",
  year="2010",
  volume="44",
  number="2",
  month="April",
  pages="93--98",
  publisher="IMT Ljubljana",
  address="Ljubljana, Slovenija",
  issn="1580-2949"
}