Влияние варьирования химического состава на микроструктуру и свойства бейнитно-мартенситной стали
Аннотация
Исследовано влияние химического состава на комплекс прочностных и вязко-пластических свойств стали 20Х2Г2СНМА глубокой прокаливаемости с бейнитно-мартенситной структурой. Проведено варьирование химического состава стали двумя способами: 1 — повышение содержания только кремния; 2 — комплексное варьирование химического состава с учетом термодинамических условий формирования бейнита. Выполнен дилатометрический анализ превращений переохлажденного аустенита в экспериментальных сталях при непрерывном охлаждении и изотермической выдержке. Оценка микроструктуры и механических свойств исследуемых сталей показала, что комплексный подход к оптимизации химического состава способствует значительному повышению ударной вязкости стали с бейнитно-мартенситной структурой (в 1,5 – 2,0 раза) при сохранении высокой устойчивости переохлажденного аустенита, характерной для исходной стали 20Х2Г2СНМА.
Ключевые слова
Литература
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DOI: https://doi.org/10.30906/mitom.2026.8.15-28
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