Increase of liquid metal utilization during production of bearing circle castings for cement furnaces

• Autorzy: Zadera A. , Senberger J. , Carbol Z. , Pluhaček J.
• Języki publikacji: EN

Abstrakty

EN

In manufacture of super heavy castings for cement furnaces a saving of liquid metal has been achieved by lowering the riser weight. By solidification modelling with the aid of the Niyama criterion a zone in the riser was designated where the occurrence of foundry defects (shrinkage porosity) can be expected. A plate of the material of dimensions ca 700*800*250 mm was taken from the riser. After thermal treatment the samples for making the bars for the static tensile test were taken from it. Based on done tests it has been found out that mechanical characteristics obtained from the static tensile test correlate, besides contraction, in the chosen level of statistical importance of p = 0.01 with carbon content. Neither in the zone of probable occurrence of defects designated by the Niyama criterion during solidification modelling the drop of strength characteristics was observed. Carbon content in a decisive extent influenced the strength characteristics. In case of ductility and contraction the convenient correlations with carbon content were observed from the riser height of 200 mm only. In the height of 400 mm there was already considerable variation of values and some values were lower ones than is demanded by standards.

Słowa kluczowe

EN

heavy casting; modelling of solidification; breaking strength; yield value; ductility; contraction

PL

odlew ciężki; modelowanie krzepnięcia; odporność na rozrywanie; plastyczność; skurcz stopu

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2012
• Tom: Vol. 12, iss. 2
• Strony: 111--116
• Opis fizyczny: Bibliogr. 6 poz., rys., tab., wykr.

Twórcy

autor

Zadera A.

autor

Senberger J.

autor

Carbol Z.

autor

Pluhaček J.

• Department of Foundry, Institute of Engineering Technology, Brno University of Technology, Brno, Czech Republic,

Bibliografia

• [1] D. M. Stefanescu. (2002). Science and Engineering of Casting Solidification, Kluwer Academic/Plenum Publishers 233 Spring Street. New York. 342.
• [2] P. Levicek, K. Stranský. (1984). Metallurgical defects of steel castings, SNTL, Praha. 1984.
• [3] F. Havlicek. (2000). Filtration of the melt through the two-phase zone. Casting defects IV. Choice of papers from the training course. Koprivnice, Czech Foundrymen Society. 5/1 - 5/9.
• [4] A. Zadera. (2011). Evaluation of quality and manufacturing technology of a bearing circle in the foundry of the joint-stock company of Vitkovice Heavy Machinery a.s. Research report.
• [5] J. Senberger, et al. (2012) Values of material mechanical properties in thick walls of steel castings. Theory and practice of steel manufacture and treatment. Conference proceedings. Ostrava, TANGER spol. s.r.o. (in print).
• [6] A. Zadera, J. Senberger, J. Pluhacek & Z. Carbol. (2011). Solidification of heavy castings. Archives of Foundry Engineering. 11 (1), 109-112.