16.12.2021 y. Teshaboyev Abduvakhob Marifovich was defended on the topic: «Development of hardening technology for cutting segments of agricultural machinery», in the specialty: 05.02.01–"Materials science in mechanical engineering.Foundry production. Heat treatment and handling of metals pressure. Metallurgyof ferrous, non-ferrous and rare metals" for the degree of Doctor of Philosophy in technical sciences (РhD).