Influence of thermal treatment on mechanicalproperties of iron-based ceramic-metal composites ВЛИЯНИЕ ТЕРМИЧЕСКОЙ ОБРАБОТКИНА ИЗМЕНЕНИЕ МЕХАНИЧЕСКИХ СВОЙСТВ МЕТАЛЛОКЕРАМИЧЕСКОЙ КОМПОЗИЦИИ НА ОСНОВЕ ЖЕЛЕЗА

• Main Authors: Lyudagovskii Andrei Vasil’evich, Kosmodianskii Andrei Sergeevich, Polyakova Marina Aleksandrovna, Krasnov Yurii Ivanovich
• Format: Article
• Language: English
• Published: Moscow State University of Civil Engineering (MGSU) 2013-06-01
• Series: Vestnik MGSU
• Subjects: sintering temperature; hardness; impact resistance; iron-graphite sam- ples; quenching with tempering; pre-compaction; температурный режим; режим спекания; твердость; ударная вязкость; железо-графитовые образцы; закалка с отпуском; предвари- тельное прессование
• Online Access: http://vestnikmgsu.ru/files/archive/RUS/issuepage/2013/6/15.pdf

In this paper, the authors study the influence of the drawback temperature of metal-ceramics composites on their mechanical properties, if composites are produced using the iron-graphite powder method. The authors have studied the microstructure of the materials and the influence that the thermal treatment produces on their strength, plastic properties and toughness. The authors have also identified specific thermal treatment parameters aimed at the improvement of mechanical properties of parts of machines and mechanisms made of the above composites. The analysis of the authors’ findings is applied to find the ways of improving the mechanical properties of machine parts produced using powder metallurgy methods.The analysis of the microstructure confirms the presence of changes in the mechanical properties of materials, namely, their plastic properties and toughness. The combination of the most efficient sintering regime (using double pre-pressing) and subsequent thermal treatment in the form of hardening and tempering can improve the mechanical properties of machine parts. The authors performed experiments to identify the best sintering conditions and improve the mechanical properties of the Fe-C composition, including its tensile and flexural strength, as well as compressive and impact strength using the above process parameters and other data obtained from the reference literature. The authors have discovered that if the sintering speed and the shrinkage ratio are maximal and vary insignificantly at the temperature near the Ac3 value and slightly above it, the mechanical properties after sintering, for example, at 870 °C and 1100°C will differ slightly.<br>Исследовано влияние температуры отпуска металлокерамических композитов Fe—C, полученных методом порошковой металлургии, на их механические свойства. Изучена микроструктура материалов и зависимость от нее прочностных свойств и ударной вязкости при раз��ых режимах термической обработки. Установлены конкретные технологические параметры, позволяющие улучшить механические свойства изготавливаемых средствами порошковой металлургии деталей машин и механизмов.