ВПЛИВ ЛЕГУЮЧИХ ЕЛЕМЕНТІВ НА ТЕХНОЛОГІЧНІ Й МЕХАНІЧНІ ВЛАСТИВОСТІ СПЛАВІВ СИСТЕМИ Cu–Zn–(Ме): Procesi littâ, 2024, Vol 2 (156), 11-18

• Datum: 2024
• Hauptverfasser: Максимова, С.В., Писарєв, А.М., Воронов, В.В.
• Format: Artikel
• Sprache: Ukrainian
• Veröffentlicht: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2024
• Schlagworte: мідно-фосфорні сплави; припій; паяння; фосфор; цинк; нікель; механічні властивості
• Online Zugang: https://plit-periodical.org.ua/index.php/plit/article/view/238
• Назва журналу: Casting Processes

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.