Detail publikace

Influence of cement moulding sands on the structure of castings

TOMEK, L. RUSÍN, K. STACHOVEC, I.

Originální název

Influence of cement moulding sands on the structure of castings

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

TOMEK, L.; RUSÍN, K.; STACHOVEC, I.

Rok RIV

2010

Vydáno

15. 9. 2010

ISSN

0046-5933

Periodikum

International Foundry Research

Ročník

62 (2010)

Číslo

No.3

Stát

Spolková republika Německo

Strany od

16

Strany do

25

Strany počet

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"
}