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Komsomolsk-on-Amur State Technical University
Название Structure and properties of aluminum alloy AK12ch (АК12ч) in the time of combined processes of casting and deformation
DOI 10.17580/tsm.2015.03.14
Автор Khimukhin S. N., Chernomas V. V., Khosen Ri, Ri E. Kh.
Информация об авторе

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”

Реферат

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.

Ключевые слова Continuous casting unit, metal deformation, macrostructure, microstructure, surface defects, lamination, fractography
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