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Кинетика роста и микроструктура слоев боридов железа на стали AISI 1050

Сафие Ипек Айваз

Аннотация


Исследована кинетика диффузии бора в стали AISI 1050 (сталь 50). Проведено борирование стали в течение 2, 4 и 6 ч при 850, 900 и 950 °C с использованием порошка Экабор-II (Ekabor-II) методом пакетного борирования. На поверхности образцов получены боридные слои FeB/Fe2B толщиной 25,4 – 118,9 мкм. Сформированные боридные слои имеют типичную зубчатую морфологию и твердость 1071 – 1460 HV0,1. Рассчитанные по результатам диффузионно-кинетических исследований константы скорости роста боридного слоя для стали AISI 1050 при температурах борирования 850, 900 и 950 °C составляют 1,522 ' 10 – 12; 2,964 ' 10 – 13 и 6,354 ' 10 – 12 м2 ' с – 1 соответственно. Определена энергия активации диффузии бора в стали AISI 1050, равная 162,93 кДж ' моль – 1.

Ключевые слова


кинетика роста; борирование; Fe2B; AISI 1050; коэффициент диффузии; микроструктура

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DOI: https://doi.org/10.30906/mitom.2023.12.18-24

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