Abstract
The article describes the development and pilot-industrial testing of the technology for producing bars from aluminum alloy D16T obtained by radial-shear rolling (RSR) from continuously cast billets (CCB) with a diameter of 72 mm in several passes. The actual dimensions of the rolled bars were within ±0.16 mm for all bar diameters, which is significantly less than the diameter tolerance stipulated by the requirements of GOST 21488–97. According to the results of tensile tests, the values of ultimate strength, conventional yield strength, relative elongation, and relative reduction were determined. The requirements of the regulatory documents for the ultimate strength and relative elongation for the D16T alloy are satisfied with a total elongation ratio of more than 4.2. In terms of plastic properties, the obtained bars are 2.1–2.5 times higher than the requirements of GOST in the entire range of investigated elongation ratios, starting from 2.07. At the same time, there is an increase in the relative elongation by 5.7–6.8 times in comparison with the initial cast state. The performed analysis of the microstructure and morphology of the secondary phases showed that, with a decrease in the diameter of the bar (with an increase in the total elongation ratio), the average particle size of the α(AlFeMnSi) phase insoluble in the aluminum matrix decreases, which is a consequence of the development of deformation processes during rolling. Additional grinding of inclusions during deformation processing can significantly reduce the possible negative effect of the insoluble phase on the mechanical properties of the resulting bars, in particular, on the property of plasticity. The analysis of the microstructure showed that the bars after rolling and heat treatment do not have cracks, looseness, delamination, and other defects and meet the requirements of GOST 21488–97.
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REFERENCES
Heinz, A., Haszler, A., Keidel, C., Moldenhauer, S., Benedictus, R., and Miller, W.S., Recent developments in aluminum alloys for aerospace applications, Mater. Sci. Eng., A, 2000, vol. 280, no. 1, pp. 102–107. https://doi.org/10.1016/S0921-5093(99)00674-7
Warner, T., Recently-developed aluminium solutions for aerospace applications, Mater. Sci. Forum, 2006, vols. 519–521, pp. 1271–1278. https://doi.org/10.4028/www.scientific.net/msf.519-521.1271
Galkin, S.P., Radial shear rolling as an optimal technology for lean production, Steel Transl., 2014, no. 44, pp. 61–64. https://doi.org/10.3103/S0967091214010069
Negodin, D.A., Galkin, S.P., Kharitonov, E.A., Karpov, B.V., Khar’kovskii, D.N., Dubovitskaya, I.A., and Patrin, P.V., Testing of the technology of radial-shear rolling and predesigning selection of rolling minimills for the adaptable production of titanium rods with small cross sections under the conditions of the “CHMP” JSC, Metallurgist, 2019, no. 62, pp. 1133–1143. https://doi.org/10.1007/s11015-019-00765-3
Alieva, S.G., Al’tman, M.B., Ambartsumyan, S.M., Anan’in, S.N., Aristova, N.A., Archakova, Z.N., Bazurina, E.Ya., Batrakov, V.P., Belousov, N.N., Borovskih, S.N., et al., Promyshlennye alyuminievye splavy. Spravochnik (Industrial Aluminum Alloys. Handbook), Kvasov, F.I., Fridlyander, I.N., Eds., Moscow: Metallurgiya, 1984.
Beletskii, V.M. and Krivov, G.A., Alyuminievye splavy (Sostav, svoistva, tekhnologiya, primenenie). Spravochnik (Aluminum Alloys (Composition, Properties, Technology, Application. Handbook), Fridlyander, I.N., Ed., Kyiv: KOMINTEKH, 2005.
Potapov, I.N. and Polukhin, P.I., Tekhnologiya vintovoi prokatki (Helical Rolling Technology), Moscow: Metallurgiya, 1990.
Romantsev, B.A., Galkin, S.P., Mikhajlov, V.K., Khloponin, V.N., and Koryshev, A.N., Bar micromill, Steel Transl., 1995, no. 2, pp. 40–42.
Galkin, S.P., Trajectory of deformed metal as basis for controlling the radial-shift and screw rolling, Steel Transl., 2004, no. 7, pp. 63–66.
Galkin, S.P., Romantsev, B.A., and Kharitonov, E.A., Putting into practice innovative potential in the universal radial-shear rolling process, CIS Iron Steel Rev., 2014, no. 9, pp. 35–39.
Volrath, K., Production of round steel using three-roll mills, Chern. Met., 2004, no. 12, pp. 23–24.
Nussbaum, G., Kramer, V., Bittner, G., and Shnel, G., Experience and results of operation of a three-roll reduction and calibration unit, Chern. Met., 2007, no. 1, pp. 37–43.
Radyuchenko, Yu.S., Rotatsionnaya kovka (Rotary Forging), Moscow: GNTI, Mashlit, 1962.
Andreev, V.A., Yusupov, V.S., Perkas, M.M., Prosvirnin, V.V., Shelest, A.E., Prokoshkin, S.D., Khmelevskaya, I.Y., Korotitskii, A.V., Bondareva, S.A., and Karelin, R.D., Mechanical and functional properties of commercial alloy TN-1 semiproducts fabricated by warm rotary forging and ECAP, Russ. Metall. (Engl. Transl.), 2017, vol. 2017, no. 10, pp. 890–894. https://doi.org/10.1134/S0036029517100020
Galkin, S.P., Gamin, Yu.V., Aleshchenko, A.S., and Romantsev, B.A., Modern development of elements of theory, technology and mini-mills of radial shear rolling, Chern. Met., 2021, no. 12, pp. 51–58. https://doi.org/10.17580/chm.2021.12.09
Xuan, T.D., Sheremetyev, V.A., Komarov, V.S., Kudryashova, A.A., Galkin, S.P., Andreev, V.A., Prokoshkin, S.D., and Brailovski, V., Comparative study of superelastic Ti–Zr–Nb and commercial VT6 alloy billets by QForm simulation, Russ. J. Non-Ferrous Met., 2021, vol. 62, pp. 39–47. https://doi.org/10.3103/S1067821221010168
Gamin, Yu.V., Koshmin, A.N., Dolbachev, A.P., Galkin, S.P., Aleschenko, A.S., and Kadach, M.V., Studying the influence of radial-shear rolling on thermal deformation conditions of A1050 processing, Russ. J. Non-Ferrous Met., 2020, vol. 61, pp. 646–657. https://doi.org/10.3103/S1067821220060085
Arbuz, A., Kawalek, A., Ozhmegov, K., Dyja, H., Panin, E., Lepsibayev, A., Sultanbekov, S., and Shamenova, R., Using of radial-shear rolling to improve the structure and radiation resistance of zirconium-based alloys, Materials, 2020, vol. 13, no. 19, article no. 4306. https://doi.org/10.3390/ma13194306
Valeev, I.Sh. and Valeeva, A.Kh., Change in microhardness and microstructure of copper M1 during radial-shear rolling, Pis’ma Mater., 2013, vol. 3, no. 1 (9), pp. 38–40.
Dobatkin, S., Galkin, S., Estrin, Y., Serebryany, V., Diez, M., Martynenko, N., Lukyanova, E., and Perezhogin, V., Grain refinement, texture, and mechanical properties of a magnesium alloy after radial-shear rolling, J. Alloys Compd., 2019, vol. 774, pp. 969–979. https://doi.org/10.1016/j.jallcom.2018.09.065
Stefanik, A., Szota, P., Mróz, S., Bajor, T., and Dyja, H., Properties of the AZ31 magnesium alloy round bars obtained in different rolling processes, Arch. Metall. Mater., 2015, vol. 60, no. 4, pp. 3002–3005. https://doi.org/10.1515/amm-2015-0479
Akopyan, T.K., Gamin, Y.V., Galkin, S.P., Prosviryakov, A.S., Aleshchenko, A.S., Noshin, M.A., Koshmin, A.N., and Fomin, A.V., Radial-shear rolling of high-strength aluminum alloys: Finite element simulation and analysis of microstructure and mechanical properties, Mater. Sci. Eng., A, 2020, vol. 786, p. 139424. https://doi.org/10.1016/j.msea.2020.139424
Gamin, Yu.V., Galkin, S.P., Romantsev, B.A., Koshmin, A.N., Goncharuk, A.V., and Kadach, M.V., Influence of radial-shear rolling conditions on the metal consumption rate and properties of D16 aluminum alloy rods, Metallurgist, 2021, vol. 65, pp. 650–659. https://doi.org/10.1007/s11015-021-01202-0
Naydenkin, E.V., Ratochka, I.V., Mishin, I.P., and Lykova, O.N., Evolution of the structural-phase state of a VT22 titanium alloy during helical rolling and subsequent aging, Russ. Phys. J., 2015, vol. 58, no. 8, pp. 1068–1073. https://doi.org/10.1007/s11182-015-0613-7
Valeeva, A.Kh., Valeev, I.Sh., and Fazlyakhmetov, R.F., Microstructure of the β-phase in the Sn11Sb5.5Cu babbit, Phys. Met. Metallogr., 2017, vol. 118, no. 1, pp. 48–51. https://doi.org/10.1134/S0031918X17010082
Naizabekov, A.B., Lezhnev, S.N., Dyja, H., Bajor, T., Tsay, K., Arbuz, A., Gusseynov, N., and Nemkaeva, R., The effect of cross rolling on the microstructure of ferrous and non-ferrous metals and alloys, Metalurgiya, 2017, vol. 56, nos. 1–2, pp. 199–202.
Karpov, B.V., Patrin, P.V., Galkin, S.P., Kharitonov, E.A., and Karpov, I.B., Radial-shear rolling of titanium alloy VT-8 bars with controlled structure for small diameter ingots (≤200 mm), Metallurgist, 2018, vol. 61, nos. 9–10, pp. 884–890. https://doi.org/10.1007/s11015-018-0581-6
Patrin, P.V., Karpov, B.V., Aleshchenko, A.S., and Galkin, S.P., Capability process assessment of radial-displacement rolling of heat-resistant alloy HN73MBTYU, Steel Transl., 2020, vol. 50, no 1, pp. 42–45.
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Galkin, S.P., Aleshchenko, A.S. & Gamin, Y.V. Development and Experimental Testing of the Technology for Producing Deformed Bars of Alloy D16T from Continuously Casting Billets of Small Diameter with Low Elongation Ratios. Russ. J. Non-ferrous Metals 63, 328–335 (2022). https://doi.org/10.3103/S1067821222030063
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DOI: https://doi.org/10.3103/S1067821222030063