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Моделирование кинетики борирования стали AISI D2 с использованием двух разных подходов

М. Кеддам, М. Кулька

Аннотация


Проведено моделирование диффузии бора в слоях FeB и Fe2B при твердофазном борировании стали AISI D2 (аналог стали Х12МФ). Использованы два подхода для оценки коэффициентов диффузии при твердофазном борировании: концепция среднего значения коэффициента диффузии в двухфазной системе FeB - Fe2B и рассмотрение кинетики роста каждого из двух боридных слоев с использованием системы обычных дифференциальных уравнений, описывающих парциальные химические реакции по параболическому закону (метод Дыбкова). Рассчитаны энергии активации диффузии бора в слоях FeB и Fe2B на стали AISI D2. Для экспериментального подтверждения двух подходов использовано условие экстремального борирования. Проведен сравнительный анализ расчетных и литературных экспериментальных данных, показавший их хорошее совпадение.

Ключевые слова


борирование; бориды железа; диффузионная модель; кинетика; энергия активации; boriding; iron borides; diffusion model; kinetics; activation energy

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Литература


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