THE INFLUENCE OF ALLOYING ELEMENTS ON THE TECHNOLOGICAL AND MECHANICAL PROPERTIES OF Cu–Zn–(Me) ALLOYS
Procesi littâ, 2024, Vol 2 (156), 11-18
DOI:
https://doi.org/10.15407/plit2024.02.011Keywords:
copper-phosphorus alloys, brazing filler metals, brazing, phosphorus, zinc, nickel, mechanical propertiesAbstract
Copper-based brazing filler metals with a melting temperature of 600–650 °C, which have a sufficient level of strength and plasticity characteristics, are in demand in modern mechanical engineering. The paper presents the results of research on the assessment of the influence of alloying elements on the technological and mechanical properties of Cu–P–(Zn, Ni) alloys. With the help of conducted studies of high-temperature differential thermal analysis, mechanical tests and with the use of statistical processing of the results, regression equations were obtained that describe the dependence of liquidus and solidus temperatures, as well as the limits of strength and relative elongation of alloys depending on the content of zinc and phosphorus. Based on the results of Cu-P-(Zn, Ni) alloys metallographic studies, the effect of phosphorus, zinc and nickel on the volume fraction of the solid solution was determined. In particular, it was established that doping alloys of the binary Cu–P system with zinc up to 25 wt. % leads to an increase in the proportion of solid solution in them from 42–45 to 65-69 vol. %. An additional increase in the amount of solid
solution in the alloy (up to 72–75 % by volume) is achieved by doping the alloy of the Cu-P-Zn system with nickel (up to 5 % by mass), which allows to obtain an alloy with a strength limit at the level of 450...500 MPa while maintaining plastic characteristics (δ = 6%). It should be noted that doping 5 wt. % of nickel with a zinc content of 25 wt. % makes it possible to maintain non-zero relative elongation at a phosphorus content of 5.5...6 wt. %. This alloying of alloys of the Cu-P-(Zn, Ni) system provides a melting temperature in the range of 650–750 °C with a lower concentration of phosphorus, and, as a result, a sufficiently high level of plastic properties (up to 6...8 %). Based on the results of the research, the composition Cu-P-(Zn, Ni) alloys was determined, which can
potentially be used as a filler metals for brazing copper and copper alloys.
References
Duffey, M.J., Marchal, J.T., Loney, M.R. et al. (2015). Strength of brazed joints and metallurgical testing of Cu–4Sn–6P and Cu–40Zn–1Sn–0,3Si silver-free filler metals. In: Proceedings of the International Brazing and Soldering Conference. (Long Beach, USA, April 19–22, 2015), 75–79.
Zhao, X., Chen, J., Hao, W., Huang, J., Chen, S. (2014). Effect of Phosphorus Additive on Microstructure and Spreading Behavior of a SnAgCu Solder. In: Proceedings of the International Brazing and Soldering Conference. (Beijing, China, June 9-13, 2014), 101–106.
Wang, J., Wang, J., Li, Y., Zheng, D. (2014). Microstructure and Shear Strength in Brazing Joint of Mo-Cu Composite with 304 Stainless Steel by Ni-Cr-P Filler Metal. High Temperature Materials and Processes, 34 (4), 347-351. DOI:10.1515/htmp-2014-0048.
Hedin, E. (2018). Influence of gap clearance on brazing joint strength for Ni and Fe based filler metals. In: Proceedings of the 7th International Brazing and Soldering Conference. (New Orleans, Louisiana, USA, April 15–18, 2018), 155–160.
Kemmenoe, D J., Theisen, E. A., Coughlan, W., Baker, S. P. (2018). Ni-Cr-Si-P and Ni-Cr-Si-B high corrosion resistance brazing of stainless steel: a new interpretation of single lap-joint (lap-shear) data. In: Proceedings of the 7th International Brazing and Soldering Conference. (New Orleans, Louisiana, USA, April 15-18, 2018), 161–162.
Yermolayev, G.V., Kvasnyc’kyj, V.V., Kvasnyc’kyj, V.F., Maksymova, S.V., Khorunov, V.F., Chygar’ov, V.V. (2015). Pajannja materіalіv: pіdruchnik [Brazing of materials: The textbook], (Eds. Khorunov, V.F., Kvasnyc’kyj, V.F.) Mykolajiv. NUK [in Ukrainian].
Lashko, S.V., & Lashko, N.F. (1988). Pajka metallov [Brazing of metals], Moskva: Mashinostroenie [in Russian].
Pisarev, A.N., Khorunov, V.F., Maksymova, S., Tovmachenko, V.N. (2016). Possibilities of reduction of growth of intermetallic interlayer in steel brazed using brazing filler metals of copper-phosphorus system. The Paton Welding Journal, 7, 17–20. DOI: 10.15407/tpwj2016.07.03.
Balart, M.J., Gao, F., Patel, J.B., Miani, F. (2019). Effects of Superheat and Solute Additions on the Grain Size in Binary Copper Alloys. Metallography, Microstructure, and Analysis, 8 (4), 566–572. DOI:10.1007/s13632-019-00559-8.
Jiang, F., Liu, H., Wen, K., Xu, H.H. (2013). Effect of La, Ce and Si co-addition on wettability of copper phosphorus brazing filler metal and microstructure of brazing seam. Hot Working Technology, 42, 202–205.
Sсherbinskaja, A.V., Mahnovskaja, L.S., Fedorov, V.N., Kornauhov, A.S. (1984). Issledovanie sistemy Cu-Ni-P v oblasti, bogatoj med’ju [Study of the Cu-Ni-P system in a copper-rich field], Izvestija AN SSSR. Metally, 4, 227–228.
Dric, M.E., Bochvar, N.R., Guzej, L.S., Abrikosov, N.H. (1979). Dvojnye i mnogokomponentnye sistemy na osnove medi: spravochnik [Dual and multi-component copper-based systems: The guidebook], Moscow. Nauka.
Jiang, M., Wang, C.P., Liu, X.J., Ohnuma, I., Kainuma, R., Vassilev, G.P., Ishida, K. (2005). Thermodynamic calculation of phase equilibria in the Cu–Ni–Zn system. Journal of Physics and Chemistry of Solids, 66 (2-4), 246-250. DOI: 10.1016/j.jpcs.2004.08.039.
Effenberg, G., Ilyenko, S. (2007). Non-Ferrous Metal Systems. Part 3 Volume 11C3 || CuNi-Zn (Copper-Nickel-Zinc). In Landolt-Börnstein - Group IV Physical Chemistry. Berlin. Springer Nature. https://doi.org/10.1007/978-3-540-47004-5_30.
Dybkov, V.I. (2002). Tverdofaznaja himicheskaja kinetika i reaktivnaja diffuzija [Solid-phase chemical kinetics and reactive diffusion], Kyiv. NAS of Ukraine [in Russian].
Suchkov, D.I. (1967). Med’ i ee splavy [Copper and its alloys]. Moskva: Metallurgija [in Russian].
Jung-Soo, B., Joon, H.C., Dong, L.N. (2000). Analysis of precipitate structure in a Cu-Ni-P alloy. Scripta Materialia, 42 (7), 637-643. DOI:10.1016/S1359-6462(99)00405-4.
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