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Влияние добавки Ni на процесс формирования и механические свойства лазерной наплавки WC – 10Co – 4Cr на низкоуглеродистой стали

Сатиш Р. Море, Джиоти В. Менгани, Акаш Вьяс

Аннотация


Исследовано влияние технологических параметров процесса лазерной наплавки, а также добавки никеля (5 – 15 % масс.) в материал покрытия на структуру и механические свойства плакированных порошком WC – 10Co – 4Cr слоев на низкоуглеродистой стали. Установлены наиболее эффективные параметры наплавки при нанесении однопроходных дорожек и с перекрытием на 50%. Определены микроструктура и фазовый состав покрытий с помощью EDS и XRD. Исследованы микротвердость покрытий и эрозионный износ. Установлено, что максимальную микротвердость (в 3,6 раза выше, чем у материала подложки) имеет покрытие WC – 10Co – 4Cr (без Ni). Покрытие с 5 % Ni обладает более высокой стойкостью к эрозионному изнашиванию, чем покрытия с 10 и 15 % Ni.

Ключевые слова


лазерная наплавка; WC – 10Co – 4Cr — Ni покрытия; низкоуглеродистая сталь; микроструктура; микротвердость; эрозионная износостойкость

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Литература


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DOI: https://doi.org/10.30906/mitom.2023.10.35-45

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