HARDENING OF CASTING FROM THE CORE SIDE AT VERTICAL CONTINUOUS MOULDING
Abstract
The problem of hardening of fusion in a crystallizer from a core side at vertical continuous molding is solved. It is established that hardening of casting from a core side proceeds in 7–10 time more slowly, than from a crystallizer. Influence of a core on the thermal mode of casting during her hardening in a crystallizer during the first 15–20 with slightly, the core didn’t manage to get warm. Settlement thickness of a crust by 20th second of formation has made no more than 1,5 mm. When using thin-walled shell cores thickness of the crust formed on a core has made ξ = 2,0–2,5 mm or less than 10% of casting thickness. Use of continuous cores raises a share of the metal hardening on a core to 15–18%. In this case the coefficient of accumulation of heat a core is accepted equal ξ = 0,75–0,85.
Keywords
continuous molding,
kinetics,
hardening,
fusion,
warmth,
core,
crust,
casting,
temperature,
parabola exponent
About the Authors
E. I. Marukovich
Institute of Technology of Metals of the NAS of Belarus
Belarus
Belarus
E. B. Demchenko
Belarusian National Technical University
Belarus
Belarus
References
1. Anisovich G. A. , Tutov V. I. , Prokopov I. P. i dr. Zatverdevanie tsilindricheskikh otlivok v sukhoy peschanoy forme [Hardening of cylindrical castings in a dry sandy form]. Doklady Academii nauk BSSR = Publication of the Academy of Science of Belarussian SSR, 1971, vol. 15, no. 6, pp. 19–21.
2. Anisovich G. A., Tutov V. I., Malyukyavichus A. A. Priblizhennyi raschet zatverdevaniya tsilindricheskoy nepreryvnoi otlivki so storony peschanogo sterzhnya [An approximate calculation of the part of the sandy bar hardening cylindrical continuous casting]. Metallurgija = Metallurgy. Minsk, Nauka i tehnika Publ., 1975, vyp. 7, pp. 29–32.
3. Veynik A. I. Priblizhennyi raschet protsessov teploprovodnosti [An approximate calculation of heat conduction processes]. Moscow-Leningrad, Gosjenergoizdat Publ., 1959. 184 p.
4. Marukovich E. I., Demchenko E. B. Teplovye javleniya pri formirovanii nepreryvnoi otlivki [Thermal phenomena in the formation of the continuous casting]. Minsk, Izdatel’stvo BNTU Publ., 2012. 208 p.
5. Anisovich G. A. Zatverdevanie otlivok [Solidification of castings]. Minsk, Nauka i tehnika Publ., 1979. 232 p.
6. Kogan V. A., etc. Teplovoi rezhim i izmenenie prochnosti obolochkovykh form v usloviyakh zalivki i zatverdevaniya metalla [Thermal conditions and changes in the strength of the shell molds in a casting and solidification]. Doklady Academii nauk BSSR = Technologiya automobilestroenija = Technology of machine building, 1968, no. 7, pp. 7–8.
7. Bergh V. P. Kachestvo liteynoi formy [The quality of the mold]. Moscow, Mashinostroenie Publ., 1970. 286 p..
Review
For citations:
Marukovich E.I., Demchenko E.B. HARDENING OF CASTING FROM THE CORE SIDE AT VERTICAL CONTINUOUS MOULDING. Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY). 2016;(2):24-30. (In Russ.)
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