Investigations of protective coatings for castings of high-manganese cast steels

• Autorzy: Holtzer M. , Bobrowski A. , Drożyński D. , Mocek J.
• Języki publikacji: EN

Abstrakty

EN

When cast steel castings are made in moulding sands on matrices of high-silica sand, which has a low fire resistance the problem of the so-called chemical penetration is distinctly visible. Whereas this effect appears to a small degree only when moulding sand matrices are of chromite, zircon or olivine sands. Therefore in case of making castings of high-manganese cast steel (e.g. Hadfield steel) sands not containing free silica should be applied (e.g. olivine sand) or in case of a high-silica matrix protective coatings for moulds and cores should be used. Two protective coatings, magnesite alcoholic (marked as coating 1 and coating 2) originated from different producers and intended for moulds for castings of the Hadfield steel, were selected for investigations. Examinations of the basic properties were performed for these coatings: viscosity, thermal analysis, sedimentation properties, wear resistance. In order to estimate the effectiveness of protective coatings the experimental castings were prepared. When applying coating 1, the surface quality of the casting was worse and traces of interaction between the casting material (cast steel) and the coating were seen. When protective coating 2 was used none interactions were seen and the surface quality was better.

Słowa kluczowe

EN

high manganese cast steel; protective coating; silica sand; quality of surface

PL

staliwo wysokomanganowe; powłoka ochronna; piasek kwarcowy; jakość powierzchni

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2013
• Tom: Vol. 13, iss. 1
• Strony: 39--44
• Opis fizyczny: Bibliogr. 10 poz., rys., wykr.

Twórcy

autor

Holtzer M.

• AGH University of Science and Technology, Faculty of Foundry Engineering, ul. Reymonta 23, 30-059 Krakow Poland

autor

Bobrowski A.

• AGH University of Science and Technology, Faculty of Foundry Engineering, ul. Reymonta 23, 30-059 Krakow Poland

autor

Drożyński D.

• AGH University of Science and Technology, Faculty of Foundry Engineering, ul. Reymonta 23, 30-059 Krakow Poland

autor

Mocek J.

• AGH University of Science and Technology, Faculty of Foundry Engineering, ul. Reymonta 23, 30-059 Krakow Poland

Bibliografia

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• [2] Holtzer M. (1992). Badanie mechanizmu i stopnia wzajemnego oddziaływania ciekłego staliwa Hadfielda i masy formierskiej. Monografia. Zeszyty Naukowe AGH Metalurgia i Odlewnictwo, Kraków 1992.
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• [6] Zych, J. (2004). Shaping surface quality of castings made in sand moulds with chemical binders. Przegląd Odlewnictwa. t. 54 nr 7–8, 594–605.
• [7] Stradomski Z., Soiński M.S. (1997): Podwyższenie własności użytkowych staliwa Hadfielda drogą wstępnej obróbki umacniającej. Archiwum Odlewnictwa, KMiS nr 33/08, 64-69.
• [8] Modrzyński A.: Manufacture of heavy-walled casts from Hadfield’s cast steel. Archiwum Odlewnictwa, KMiS nr 43/42.
• [9] Chojecki A., Telejko I. (2009): Cracks in high-manganese cast steel, Archives of Foundry Engineerig, vol. 9 iss. 4, 17-22.
• [10] Skoczylas P., Krzyńska A., Kaczorowski M. (2011): The comparative studies of ADI versus Hadfield cast steel wear resistance. Archives of Foundry Engineerig Vol. 11 iss. 2, 123-12.