THERMOMECHANICAL PROPERTIES OF FORMS ON VARIOUS BINDERS AND THE FORMING CONDITIONS OF HIGH-QUALITY CASTINGS
https://doi.org/10.17073/0368-0797-2016-8-547-551
Abstract
The paper presents the basic thermomechanical properties of the molding and core mixtures and the factors they depend on. The authors of the work have analyzed the conditions for thermal and dynamic eff ects of melt on the walls of the form during the fi lling and hardening of the metal and their infl uence on the formation of surface defects in the casting. The article also gives the results of deformation dependence of the most common molding sands on the duration of heating when simulating actual conditions of casting formations. The connection of deformation capacity of the mixture with the defects formed on the castings and compliance of molding (core) mixture has been shown. A set of measures to prevent surface defects has been off ered in the paper. It has been established that the formation of scabs, breaks and burnings-on at castings is a consequence of the deformation changes and destruction of surface layers of the mixture. From the point of view of exclusion of surface defects and environmental aspects, the best are sodium silicate and metallophosphate mixtures.
About the Authors
E. A. Chernyshov
Nizhny Novgorod State Technical University named after R.Е. Alekseev, Nizhny Novgorod, Russia
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor of the Chair “Metallurgical Technology and Equipment”
A. A. Evlampiev
Chuvash State University, Cheboksary, Russia
Russian Federation
Russian Federation
Cand. Sci. (Eng.), Professor of the Chair “Technology of Metals and Foundry Engineering”
A. V. Korolev
Chuvash State University, Cheboksary, Russia
Russian Federation
Russian Federation
Cand. Sci. (Eng.), Assist. Professor of the Chair “Technology of Metals and Foundry Engineering”
L. A. Ivanova
Chuvash State University, Cheboksary, Russia
Russian Federation
Russian Federation
Senior Lecturer of the Chair “Technology of Metals and Foundry Engineering”
O. V. Moiseeva
Chuvash State University, Cheboksary, Russia
Russian Federation
Russian Federation
Engineer of the Chair “Technology of Metals and Foundry Engineering”
References
1. Chernyshov E.A., Evlampiev A.A. Tekhnologiya liteinogo proizvodstva [Foundry engineering technology]. Moscow: Vysshaya shkola – Abris, 2012, 383 p. (In Russ.).
2. Zhukovskii S.S. Prochnost’ liteinoi formy [Strength of casting molds]. Moscow: Mashinostroenie, 1989, 288 p. (In Russ.).
3. Zhukovskii S.S., Lyass A.M. Formy i sterzhni iz kholodnotverdeyushchikh smesei [Forms and bars from cold-hardening mixtures]. Moscow: Mashinostroenie, 1978, 224 p. (In Russ.).
4. Illarionov I.E., Gamov E.S., Vasin V.P., Chernyshevich E.G. Metallofosfatnye svyazuyushchie i smesi [Metallophosphate binders and mixtures]. Illarionov. I.E. ed. Cheboksary: izd-vo pri Chuvash. un-te, 1995, 524 p. (In Russ.).
5. Serebro V.S. Research of form surface washing at fi lling. Liteinoe proizvodstvo. 1978, no. 7, pp. 4–5. (In Russ.).
6. Medvedev Ya.I., Valisovskii I.V. Tekhnologicheskie ispytaniya formovochnykh materialov [In-process tests of molding material]. Moscow: Mashinostroenie, 1973, 312 p. (In Russ.).
7. Trukhov A.P., Sorokin Yu.A., Bychkov N.V Formation mechanism of scabs and the ways of their avoidance. Zagotovitel’nye proizvodst va v mashinostroenii. 2005, no. 4, pp. 7–12. (In Russ.).
8. Trukhov A.P., Sorokin Yu.A., Ershov M.Yu. etc. Tekhnologiya liteinogo proizvodstva: Lit’e v peschanye formy [Foundry engineering technology: Casting in sand forms]. Trukhov A.P. ed. Moscow: ITs “Akademiya”, 2005, 528 p. (In Russ.).
9. Zhukovskii S.S., Anisovich G.A., Davydov N.I. etc. Formovochnye materialy i tekhnologiya liteinoi formy [Molding materials and the mechanism of casting molds]. Zhukovskii S.S. ed. Moscow: Mashinostroenie, 1983, 432 p. (In Russ.).
10. Zhukovskii S.S., Boldin A.N., Yakovlev A.I. etc. Formovochnye i sterzhnevye smesi [Molding and core sands]. Zhukovskii S.S. ed. Bryansk: izd. BGTU, 2002, 469 p. (In Russ.).
11. Romashkin V.N. Thermomechanical fracture of casting molds and the formation of surface defects. In: Trudy devyatogo s”ezda liteishchikov [Proceedings of the 9th Congress of Founders]. Ufa, 2009, pp. 268–271. (In Russ.).
12. Romashkin V.N., Nuraliev F.A., Stepashkin Yu.A., Valisovskii I.V. Introduction into thermal engineering of molding sand fractures. Liteinoe proizvodstvo. 2010, no. 4, pp. 25–30. (In Russ.).
13. Valisovskii I.V. Prigar na otlivkakh [Burnings-on at castings]. Moscow: Mashinostroenie, 1983, 192 p. (In Russ.).
14. Kukui D.M., Skvortsov V.A., Ektova V.N. Teoriya i tekhnologiya liteinogo proizvodstva [Theory and technology of foundry engineering]. Minsk: Dizain PRO, 2000, 416 p. (In Russ.).
15. Evlampiev A.A., Chernyshov E.A. Developmental trends, technological peculiarities and perspectives of using sand-phosphate mixtures. Liteishchik Rossii. 2009, no. 11, pp. 35–37. (In Russ.).
16. Boldin A.N., Davydov N.I., Zhukovskii S.S. etc. Liteinye formovochnye materialy. Formovochnye, sterzhnevye smesi i pokrytiya: Spravochnik [Casting molding materials. Molding, core sands and coatings: Reference book]. Moscow: Mashinostroenie, 2006, 507 p. (In Russ.).
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For citations:
Chernyshov E.A., Evlampiev A.A., Korolev A.V., Ivanova L.A., Moiseeva O.V. THERMOMECHANICAL PROPERTIES OF FORMS ON VARIOUS BINDERS AND THE FORMING CONDITIONS OF HIGH-QUALITY CASTINGS. Izvestiya. Ferrous Metallurgy. 2016;59(8):547-551. (In Russ.) https://doi.org/10.17073/0368-0797-2016-8-547-551
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