КОМПЛЕКСНОЕ ИССЛЕДОВАНИЕ ЭЛЕКТРОЛИТНО-ПЛАЗМЕННОГО АЗОТИРОВАНИЯ АУСТЕНИТНОЙ-НЕРЖАВЕЮЩЕЙ СТАЛИ

В настоящей работе проведено исследования спектральных характеристик электрического разряда в процессе электролитно-плазменном азотировании, структурные и фазовые изменения, происходящие в аустенитной нержавеющей стали. Обработка проводилась в электролите, содержащем 10% кальцинировання сода (Na₂CO₃), 20% карбамид (CO(NH₂)₂) и 3% аммоний хлорид (NH₄Cl) при температуре 550 °C в течение 10 минут. Эмиссионная спектроскопия показала присутствие активных форм азота (N₂⁺, N I), водорода (Hα) и кислорода (O I) в составе плазмы. Расчёт электронной плотности на основе уширения линии Hα серий Бальмера дал значение порядка 8.5 × 10¹⁸ см⁻³. Рентгенофазовый анализ выявил формирование нитридных фаз CrN и Fe₃N, а также твёрдого раствора азота в γ-Fe. Микроструктурные исследования с помощью РЭМ показали наличие трёхчленной структуры азотированного слоя: нитридной зоны, переходной области и исходный аустенитной матрицы. Энергодисперсионный рентгеновский анализ подтвердил наличие концентрационного градиента азота по глубине.

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