Publication detail

Influence of cement moulding sands on the structure of castings

TOMEK, L. RUSÍN, K. STACHOVEC, I.

Original Title

Influence of cement moulding sands on the structure of castings

Type

journal article - other

Language

English

Original Abstract

In the interface between cement cores and iron with flake graphite were certified generation of komplex allied substances - on the base Si, Fe, Al, O and Ca. These complex allied substances originate as a result of chemical reactions between molten metal and cement sand. In many cases FeS has been found. Its occurrence is evoked by CaSO4 (Bassanite) from Portland cement. Elements such as Si, Al, Ca and Fe may be released by thermal dissociation from products of cement setting. Created mathematical model proved influence of temperature and chemical composition of liquid metal on occurrence of mechanical penetration in this case. With increasing temperature and higher content of carbon in cast iron is chance of mechanical penetration higher. Average grain size of opening material is remarkable too. The higher content of sulphur is dangerous for castings of nodular iron. In additional trials the rest content of magnesium was liquidated by this element and particles of flake graphite and other forms of graphite have been found in the surface layers of nodular iron castings.

Keywords

Cement Sand; Interaction, Gray Cast Iron; Nodular Iron; Complex Allied Substances

Authors

TOMEK, L.; RUSÍN, K.; STACHOVEC, I.

RIV year

2010

Released

15. 9. 2010

ISBN

0046-5933

Periodical

International Foundry Research

Year of study

62 (2010)

Number

No.3

State

Federal Republic of Germany

Pages from

16

Pages to

25

Pages count

45

BibTex

@article{BUT50586,
  author="Ladislav {Tomek} and Karel {Rusín} and Ivo {Stachovec}",
  title="Influence of cement moulding sands on the structure of castings",
  journal="International Foundry Research",
  year="2010",
  volume="62 (2010)",
  number="No.3",
  pages="16--25",
  issn="0046-5933"
}