Institute of materials science of Khabarovsk Scientific Center of Far-Eastern Branch of Russian Academy of Sciences, Khabarovsk, Russia:

S. N. Khimukhin, Assistant Professor, Head of Laboratory “Construction and instrumental materials”, e-mail: ximyxin@yandex.ru

Komsomolsk-on-Amur State Technical University, Komsomolsk-on-Amur, Russia:

V. V. Chernomas, Professor of a Chair of Machine Building and Metallurgy

Pacific Naional University, Khabarovsk, Russia:

Khosen Ri, Professor, Head of a Chair “Foundry and Metal Technology”

E. Kh. Ri, Managing Director of Innovation Department of Pacific Naional University, Professor of a Chair “Foundry and Metal Technology”

It is relevant to develop the technologies for production of long-length metalware of aluminum alloy, which, in most cases, can be realized on the basis of combined processes of continuous casting and hot metal forming. This paper presents the results of studies of casting defects in eutectic silumina AK12ch (АК12ч) metal stripes (4.5 mm and 9 mm thickness), obtained at experimental installation of physical modeling of deformation process by solid-liquid forming method. The operating principles and construction diagram of this experimental installation are described. The regularities of macro-and-microstructure formation of metal were investigated together with its mechanical properties. Few defects were found in the stripes of 4.5 mm thickness during evaluation of degree of technological regimes' influence on metal quality. Samples of metal strips were subjected to the tests on hardness and proportionality limit at compression. Wide range of changes in the values of mechanical properties is due to inhomogeneous microstructure and is confirmed by the results of metallographic analysis. Besides, the compression test revealed a longitudinal lamination of metal. According to the results of fractographic and metallographic analysis, there was established that the cause of lamination is the layered character of microstructure formation. Structural components of metal layers, located in the central part of the stripe, have a relatively larger structural components than metal layer components, located in the marginal zone. Research results show the ways for further improvement of combined processes technology.

1. Minaev A. A. Sovmeshchennye metallurgicheskie protsessy (Combined metallurgical processes). Donetsk : UNITEKh, 2008. 552 p. 

2. Raab G. J., Valiev R. Z., Lowe T. C., Zhu Y. T. Continuous processing of ultrafine grained Al by ECAP-Conform. Materials Science and Engineering: A. 2004. Vol. 382, Iss. 1/2. pp. 30–34.

3. Xua C., Schroeder S., Berbon P. B., Langdon T. G. Principles of ECAPConform as a continuous process for achieving grain refinement: Application to an aluminum alloy. Acta Materialia. 2010. Vol. 58, Iss. 4. pp. 1379–1386. 

4. Cho J. R., Jeong H. S. Parametric investigation on the curling phenomenon in CONFORM process by three-dimensional finite element analysis. Journal of Materials Processing Technology. 2001. Vol. 110, Iss. 1. pp. 53–60. 

5. Lyubanova A. S., Gorokhov Y. V., Solopko I. V., Ziborov A. Y. Optimization of the uniformity of a metal flow during continuous extrusion by conform method. Russian metallurgy (Metally). 2010. Iss. 3. pp. 178–182. 

6. Konstantinov I. L., Gubanov I. Y., Gorokhov Y. V. Computer simulation of the production process for isothermal forging of profiled panels made of aluminum alloys. Russian Journal of Non-Ferrous Metals. 2013. Vol. 54, Iss. 3. pp. 220–223.

7. Сtulov V. V., Odinokov V. I., Ogloblin G. V. Fizicheskoe modelirovanie protsessov pri poluchenii litoy deformirovannoy zagotovki (Physical modeling of processes during cast deformed billet obtaining). Vladivostok : Dalnauka, 2010. 175 p. 

8. Bogolyubova D. N., Tikhonova I. V., Gvozdev A. E. Strukturoobrazovanie v alyuminievykh kovochnykh splavakh pri goryachey deformatsii (Structure formation in aluminium forging alloys during hot deformation). Izvestiya Tulskogo gosudarstvennogo universiteta. Tekhnicheskie nauki = Bulletin of Tula State University. Engineering sciences. 2011. No. 2. pp. 329–335. 

9. GOST 1583–93. Splavy alyuminievye liteynye. Tekhnicheskie usloviya (State Standard 1583–93. Aluminium casting alloys. Technical requirements). Introduced: January 01, 1997. (in Russian).

10. GOST R 8.585–2001. Gosudarstvennaya sistema obespecheniya edinstva izmereniy. Termopary. Nominalnye staticheskie kharakteristiki preobrazovaniya (State Standard R 8.585–2001. State system of traceability provision. Thermocouples. Nominal static characteristics of transformation). Introduced: 2002–07–01. (in Russian).

11. TU 4218-004-12023213–2004. Pribory dlya izmereniya i regulirovaniya temperatury mnogokanalnye “Termodat” (Technical requirements 4218-004-12023213–2004. Multi-channel units for measurement and regulation of temperature “Termodat”). (in Russian).

12. Chernomas V. V., Lovizin N. S., Sosnin A. A. Kriterii ustoychivosti tekhnologicheskogo protsessa polucheniya metalloizdeliy na ustanovke gorizontalnogo litya i deformatsii metalla (Criteria of stability of technological process of obtaining of metal products on horizontal casting unit and metal deformation). Problemy mashinostroeniya i nadezhnosti mashin = Journal of Machinery Manufacture and Reliability. 2012. No. 2. pp. 71–77. 

13. Chernomas V. V. Issledovanie teplovykh protsessov, protekayushchikh pri izgotovlenii metalloizdeliy sovmeshchennym metodom litya i shtampovki (Research of thermal processes, flowing during manufacturing of metal products by combined method of casting and stamping). Obrabotka metallov: tekhnologiya, oborudovanie, instrumenty = Metal treatment: technology, equipment, instruments. 2011. No. 3. pp. 3–10. 

14. Chernomas V. V., Khimukhin S. N., Salikov S. R., Konovalov A. V. Modelirovanie protsessa deformatsii pri poluchenii alyuminievoy polosy sovmeshchennym metodom litya i deformatsii metalla (Deformation process modeling during obtaining of aluminium bar by combined method of casting and deformation of metal). Obrabotka metallov: tekhnologiya, oborudovanie, instrumenty = Metal treatment: technology, equipment, instruments. 2012. No. 3. pp. 5–11.

15. GOST 9012–59. Metally. Metod izmereniya tverdosti po Brinellyu (State Standard 9012–59. Metals. Brinell hardness testing method). Applied: January 01, 1960. (in Russian).