Особливості застосування хром-цирконієвих бронз та способи покращення їх властивостей

• Datum: 2023
• Hauptverfasser: Ліхацький, Р. Ф., Ворон, М. М., Нарівський, А. В.
• Format: Artikel
• Sprache: Ukrainian
• Veröffentlicht: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2023
• Schlagworte: високотемпературна міцність міді; легування мідних сплавів; термічна обробка; зміцнення; БрХЦр; мікроструктура
• Online Zugang: https://plit-periodical.org.ua/index.php/plit/article/view/features-chromium-zirconium-bronzes-application-and-ways-improve
• Назва журналу: Casting Processes

Physico-Technological Institute of Metals and Alloys of the NAS of Ukraine (Kyiv, Ukraine) Received 14.02.2022 UDK 669.35:669.017.13 Modern development of mechanical engineering and electrical engineering requires alloys that have high electrical conductivity and sufficient strength parameters under normal conditions and at elevated temperatures, due to the peculiarities of application. The production of such materials and products from them should be simple and cheap, due to the large volumes of their consumption. The mechanical properties of pure and low-alloyed copper are mediocre, but by alloying it with chromium and zirconium, it is possible to greatly increase the strength, while maintaining the electrical conductivity of more than 80 % of the electrical conductivity of pure copper. Heat treatment of bronze leads to the release of dispersed particles with low solubility in the matrix metal at elevated temperatures, followed by dispersion hardening. This is what ensures the high electrical conductivity of such bronzes. It is shown that the use as alloying elements of most other metals is economically less feasible or leads to a significant loss of electrical conductivity. The paper considers an influence of different types of alloys hardening of Cu-Cr and Cu-Cr-Zr systems on electrical conductivity, their mechanical and operational properties. Studies characterize the influence on the alloys characteristics such parameters as different types of deformation, thermomechanical and heat treatment. The properties of Cu-Cr-Zr bronze, including in various technological states, as one of the most common alloys of this system are indicated. Based on the analysis of information, it is concluded that an additional increase in the application properties of this alloys type is possible by microalloying with insoluble components - V, Mo, W, Nb, Hf.   References 1 Shangina D. V. (2010). 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