Electrometallurgy Today, 2021, №03



2021 №03 (04)

DOI of Article 10.37434/sem2021.03.05

2021 №03 (06)

---

Electrometallurgy Today (Sovremennaya Elektrometallurgiya), 2021, #3, 28-34 pages

Manufacturing deformed semi-finished zirconium alloy products from ingots, melted by the method of nonconsumable-electrode arc remelting in a skull furnace

O.Ye. Kapustian¹, I.A. Ovchynnykova²

¹Zaporizhzhia Polytechnic National University. 64 Zhukovsky Str, 69063, Zaporizhzhia, Ukraine. E-mail: aek@zntu.edu.ua
²Zaporizhzhia National University. 66 Zhukovsky Str, 69063, Zaporizhzhia, Ukraine. E-mail: iaov31@gmail.com

Abstract
The possibility of manufacturing deformed semi-finished products in the form of rods of zirconium β-alloy from ingots produced by nonconsumable-electrode arc remelting in a skull furnace was studied. Ingots of 50 mm diameter were produced by single remelting of an uncompacted charge. Hot deformation of the ingots to produce 30 mm diameter rods was performed by forging in a pneumatic forging hammer. Ingot forging modes are given. Performed hot deformation processing of zirconium alloy ingots led to cracking of the forging. Cracks developed in chaotically located zones. «Outer simple» cracks of up to 5 mm depth prevail by the location and shape. Structural studies of metal of an ingot of experimental zirconium alloy of Zr‒Nb‒Ti system, produced by the method of nonconsumable-electrode arc remelting in a skull furnace, revealed absence of micropores, cracks or other defects. The method of X-ray microprobe analysis was used to establish the presence of a phase with higher zirconium concentration and 2.5…3.0 times lower concentration of titanium and niobium, compared to the matrix phase. Phase size was from 1 to 30 μm. In order to produce an ingot with the specified homogeneous chemical composition, it was proposed to apply double remelting: use consumableelectrode vacuum-arc remelting after nonconsumable-electrode arc remelting in a skull furnace. Ref. 14, Tabl. 2, Fig. 7.
Keywords: vacuum-arc remelting; zirconium alloy; ingot; chemical composition; structure; deformation processing; forging; semi-finished productss

Received 20.05.2021

References

1. Mishchenko, O., Ovchynnykov, O., Kapustian, O., Pogorielov, M. (2020) New Zr-Ti-Nb alloy for medical application: Development, chemical and mechanical properties, and biocompatibility. Materials, 13(6), 1306. https://doi.org/10.3390/ma13061306
2. Kapustian, O.E., Ovchynnykov, O.V., Volchok, I.P. (2020) Examination of possibility for application of Zr-Ti-Nb alloys instead of Ti-6Al-4V titanium alloy for biomedical purpose products. Visnyk KhNADU, 91(1), 15-22 [in Ukrainian]. https://doi.org/10.30977/BUL.2219-5548.2020.91.0.15
3. Paton, B.E., Akhonin, S.V., Berezos, V.A. (2018) Development of technologies of electron beam melting of metals at the E.O. Paton Electric Welding Institute of the NAS of Ukraine. Suchasna Elektrometal., 4, 19-35 [in Russian]. https://doi.org/10.15407/sem2018.04.01
4. Smitlz, K.J. (1980) Metals: Refer. Book. Moscow, Metallurgiya [in Russian].
5. Azhazha, V.M., Butenko, I.N., Borts, B.V. et al. (2007) Alloy Zr1Nb for power engineering of Ukraine. Yaderna Fizyka ta Energetyka, 21(3), 67-75 [in Russian].
6. Ovchynnykov, O.V., Kapustian, O.E. (2020) Technology for smelting zirconium alloy ingots by vacuum arc remelting with a non-consumable electrode in a skull furnace. Suchasna Elektrometal., 4, 32-38. https://doi.org/10.37434/sem2020.04.06
7. Ivasyshyn, O.M., Skyba, I.O., Karasevska, O.P., Markovskyi, P.Ie. (2013) Biocompatible alloy with low modulus of elasticity based on zirconium-titanium system (variants). IMP, Pat. 102455, Ukraine [in Ukrainian].
8. ISO 5832-3:2016: Implants for surgery - Metallic materials. Pt 3: Wrought titanium 6-aluminium 4-vanadium alloy.
9. Butenko, I.N., Pelykh, V.N., Tur, Yu.V. (2006) Metallographic examinations of Zr1Nb alloy. Voprosy Atomnoj Nauki i Tekhniki. Seriya: Vacuum, Chistye Materialy, Sverkhprovodniki, 15(1), 170-173 [in Russian].
10. Bekkert, M., Klemm, H. (1988) Methods of metallographic etching: Refer. Book. Moscow, Metallurgiya [in Russian].
11. Drits, M.E. (1985) Properties of elements: Refer. Book. Moscow, Metallurgiya, [in Russian].
12. Okhrimenko, Ya.M., Tyurin, V.A. (1977) Theory of forging processes. Moscow, Vysshaya Shkola [in Russian].
13. Kolobov, G.A., Pavlov, V.V., Karpenko, A.V., Kolobova, A.G. (2015) Refinement of refractory rare metals of IV group of periodic table. Novi Materialy i Tekhnologii v Metalurgii ta Mashynobuduvanni, 1, 89-95 [in Russian].
14. Ladokhin, S.V., Vakhrusheva, V.S. (2008) Prospects of using electron beam melting for production of zirconium alloys in Ukraine. Advances in Electrometallurgy, 4, 15-19.

---

Advertising in this issue:

---