On modification of silumins

It has been shown that the elementary crystal cells of the basic products of modification of silumins, aluminum and silicon do not correspond to the principle of structural and dimensional correspondence of Dankov – Konobeevsky. Modifying elements B, Sr, P significantly increase the surface energy of liquid silumins, and Zr and Ti practically do not affect it. Modification of silumins is a nanostructured process. Ti, Zr, B form intermetallides that refine aluminum nanocrystals from demodifying adsorbed hydrogen atoms. Phosphorus, atomically dissolving in silumin, refiners silicon nanocrystals from adsorbed oxygen. Na and Sr form an emulsion and colloid in liquid silumin, which protect eutectic microcrystals of α‑and βSi‑phases from demodifying molecular hydrogen. All these processes increase the concentration of crystallization centers of dendritic microcrystals α‑and βSi‑phase, make them more branched and compact.

1. Nikitin V. I., Nikitin K. V. Nasledstvennost’ v lityh splavah [Heredity in cast alloys]. Moscow, Mashinostroenie‑1 Publ., 2005, 476 p.

2. Brodova I. G., Popel’ P.S., Barbin N. M. et al. Iskhodnye rasplavy kak osnova formirovaniya struktury i svojstv alyuminievyh splavov [Initial melts as the basis for the formation of the structure and properties of aluminum alloys]. Ekaterinburg, URO RAN Publ., 2005, 370 p.

3. Efimenko V. P., Baranov A.A., Kisun’ko V.Z. et al. O modificiruyushchem vliyanii nekotoryh dobavok na kristallizaciyu silumina [On the modifying effect of some additives on silumin crystallization]. Izvestiya vysshih uchebnyh zavedenij. Cvetnaya metallurgiya = Izvestiya vysshih uchebnyh zavedenij. Non‑Ferrous Metallurgy, 1982, no. 6, pp. 86–89.

4. Kimstach G. M., Muhoveckij YU.P., Borshchov V. D. et al. Issledovanie processov modificirovaniya Al‑Si splavov [Study of Al‑Si Alloy Modification Processes]. Metallovedenie i termicheskaya obrabotka metallov = Metal Science and Heat Treatment, 1984, no. 8, pp. 57–59.

5. Marukovich E. I., Stetsenko V.Yu. Modificirovanie splavov [Modification of alloys]. Minsk, Belaruskaya navuka Publ., 2009, 192 p.

6. Stetsenko V. Yu. Teoreticheskie i tekhnologicheskie osnovy polucheniya zagotovok povyshennoj iznosostojkosti iz siluminov s vysokodispersnoj invertirovannoj strukturoj. Avtoref. dis. dokt. tekhn. nauk [Theoretical and technological bases for production of blanks of increased wear resistance from silumins with highly dispersed inverted structure]. Autoref. diss. Dr. technical sciences. BNTU Publ., Minsk, 2021, 60 p.

7. Spravochnik himika [Chemist’s Handbook]. Leningrad, Himiya Publ., 1971, vol. 1, 1072 p.

8. Samsonov G. V., Vinnickij I. M. Tugoplavkie soedineniya (spravochnik) [Refractory compounds (reference)]. Moscow, Metallurgiya Publ., 1976, 560 p.

9. Stroganov G. B., Rotenberg V.A., Gershman G. B. Splavy alyuminiya s kremniem [Aluminium‑silicon alloys]. Moscow, Metallurgiya Publ., 1977, 272 p.

10. Marukovich E. I., Stetsenko V. Yu., Stetsenko A. V. Nanostrukturnaya kristallizaciya siluminov [Nanostructured crystallization of silumins]. Lit’e i metallurgiya = Foundry production and metallurgy, 2022, no. 1, pp. 40–42.

11. Makarov G. S. Rafinirovanie alyuminievyh splavov gazami [Refining of aluminium alloys with gases]. Moscow, Metallurgiya Publ., 1983, 120 p.

12. Svojstva elementov. CH. 1. Fizicheskie svojstva: spravochnik [Properties of elements. Part 1. Physical Properties: Reference]. Pod red. G. V. Samsonova. Moscow, Metallurgiya Publ., 1976, 600 p.

13. Konstanty vzaimodejstviya metallov s gazami: spravochnik [Metal‑Gas Interaction Constants: Reference]. Pod red. B.A. Kolacheva i YU.V. Levinskogo. Moscow, Metallurgiya Publ., 1987, 368 p.

14. Zhuhovickij A.A., Shvarcman L.A. Fizicheskaya himiya [Physical chemistry]. Moscow, Metallurgiya Publ., 1987, 688 p.

15. Golubcov V.A., Lunev V. V. Modificirovanie stali dlya otlivok i slitkov [Steel modification for castings and ingots]. Chelyabinsk – Zaporozhye, ZNTU Publ., 2009, 356 p.

16. Dobatkin V. I., Gabidullin R. M., Kolachev B.A. et al. Gazy i okisly v alyuminievyh formiruemyh splavah [Gases and oxides in aluminum formed alloys]. Moscow, Metallurgiya Publ., 1976, 264 p.

17. Kilin A. B. Vliyanie elektricheskogo toka na degazaciyu i modificirovanie alyuminievyh splavov [Influence of electric current on degassing and modification of aluminium alloys]. Litejnoe proizvodstvo = Foundry, 2002, no. 8, pp. 21–22.

18. Napalkov V. I., Mahov S. V., Pozdnyakov A. V. Modificirovanie alyuminievyh splavov [Modification of aluminium alloys]. Moscow, Izdatel’skij dom MISiS Publ., 2017, 348 p.

19. Boom E.A. Priroda modificirovaniya splava tipa silumin [Nature of modification of silumin alloy]. Moscow, Metallurgiya Publ., 1972, 72 p.

20. Zadruckij S. P., Nemenenok B. M., Korolev S. P. et al. O rafinirovanii i modificirovanii alyuminievyh splavov [On Refining and Modification of Aluminum Alloys]. Litejnoe proizvodstvo = Foundry, 2004, no. 3, pp. 17–22.

21. Baranenko O.A., Kuznecov A.A. Vliyanie kisloroda na formu rosta kristallov tverdogo rastvora na osnove kremniya [Effect of Oxygen on Crystal Growth Form of Silicon‑Based Solid Solution]. Vestnik DGMA = Vestnik DGMA, 2007, no. 2E (10), pp. 201–204.