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Andreyachshenko V.A.,Karaganda State Technical University | Ibatov M.K.,Karaganda State Industrial University | Issagulova D.A.,Karaganda State Technical University
Metalurgija | Year: 2016

There is studied the technology of processing Ti-6Al-4V powder material with various initial densities using the method of equal channel angular pressing. The device with the 90, 120 and 135 degree angled joint channels was used for the study. The deformation was carried out at the room temperature. It was found that the most favorable stressed-and-strained state was formed in the instrument where the angle of channel joints was equal to 135 degrees. The maximum compression in the instrument is reached at 90 degree angle of the channel joints, but it needs a larger deformation force. To obtain pressed material it is recommended to use a high ECAP cycle for any configuration. © 2016, Faculty of Metallurgy. All Rights Reserved.

Butrin A.G.,South Ural State University | Gel'Manova Z.S.,Karaganda State Industrial University | Yarushin D.L.,Zlatoust Electrometallurgical Plant
Metallurgist | Year: 2015

The author presents an original method of evaluating risks for companies in ferrous metallurgy. The method involves identifying sources of risks on the basis of parameters of the external and internal environments. It was developed to help upgrade equipment at factories and increase sales. © 2015 Springer Science+Business Media New York.

Naizabekov A.B.,Karaganda State Industrial University | Andreyashchenko V.A.,Karaganda State Industrial University
Metallurgist | Year: 2013

Data are provided for evaluation of possible improvement of mechanical properties for alloy of the Al-Fe-Si-Mn system. Alloy microstructure is simulated after deformation. Simulation results are confirmed by actual experimental data. Mechanical properties are also determined after alloy deformation. © 2013 Springer Science+Business Media New York.

Naizabekov A.B.,Karaganda State Industrial University | Andreyachshenko V.A.,Karaganda State Industrial University | Kocich R.,VSB - Technical University of Ostrava
Micron | Year: 2013

The presented article deals with the effects of equal channel angular pressing (ECAP) with a newly adjusted die geometry on the microstructure and mechanical properties of the Al-Si-Mn-Fe alloy. This alloy was subjected to two modes of heat treatment followed by the ECAP process, which led to partial back pressure (ECAP-PBP). Ultra-fine grained (UFG) structure formed through ECAP-PBP process has been studied by methods of optical as well as electron microscopy. The obtained results indicate that quenched alloys, in comparison to slowly cooled alloys, do not contain large brittle particles which subsequently initiate a premature creation of cracks. It was shown that the mechanical properties of these alloys after such processing depend first and foremost on the selected type of heat treatment and on the number of performed passes. The maximum of ultimate tensile strength (417. MPa) was obtained for quenched alloy after 3 passes. On the other hand, maximum ductility was found in slowly cooled alloy after second pass. Further passes reduced strength due to the brittle behavior of excluded particles. One of the partial findings is that there is only a small dependency of the resulting size of grains on previously applied thermal processing. The minimum grain sizes were obtained after 3 passages, where their size ranged between 0.4 and 0.8 μm. The application of quick cooling after heat processing due to the occurrence of finer precipitates in the matrix seems to produce better results. © 2012 Elsevier Ltd.

Lezhneva V.,Karaganda State Industrial University | Lezhnev S.,Karaganda State Industrial University
METAL 2013 - 22nd International Conference on Metallurgy and Materials, Conference Proceedings | Year: 2013

Metallurgical industry of Kazakhstan is the large sector of domestic economy. Basic mining and metallurgical companies of Kazakhstan, first of all Euroasian industrial association, ArcelorMittal Temirtau JSC, Kazakhmys Corporation JSC, Kazzink JSC, represent uniform production & economic complex incorporating plants of mining, enrichment and metallurgical processing, as well as power and the heat producing enterprises, well developed infrastructure, providing the financial, marketing, selling, external economic and scientific research works. © 2013 TANGER Ltd., Ostrava.

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