Влияние добавки Ti на микроструктуру, механические свойства и характер фазовых превращений при старении в сплаве Cu – Zn – Ni
Аннотация
Исследовано влияние добавки титана на микроструктуру, механические свойства и характер фазовых превращений при старении Cu – Zn – Ni-сплава. Установлено, что в сплаве Cu – 30Zn – 6Ni – 1,5Ti (масс. %) образуются фазы Ni3Ti и NiTi. После обработки на твердый раствор большая доля частиц Ni3Ti растворяется в матрице, а NiTi сохраняются в структуре. При последующем старении наноразмерные частицы Ni3Ti и Cu2NiZn выделяются из матрицы, что значительно повышает механические свойства и электропроводность сплава. После холодной прокатки (90 %) и старения при 440 °C, 1 ч твердость, пределы текучести и прочности, электропроводность и относительное удлинение сплава составляют 323 HV, 1190 МПа, 1295 МПа, 11,2 % IACS и 2 % соответственно. Получено уравнение кинетики выделения вторичных фаз при старении сплава. Показана перспективность создания Cu – Zn – Ni – Ti-сплавов со сверхвысокой прочностью и высокой электропроводностью.
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Литература
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DOI: https://doi.org/10.30906/mitom.2026.3.44-44
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