20.02.2025 у. at 14:30 o'clock Irgashev Bekhzod Amirkulovich was defended on the topic: «Development of a methodology for increasing the wear resistance and resource of gear wheels of machine units operating in an abrasive environment, surface heat treatment», in the specialty: 05.02.01 - "Materials science in mechanical engineering. Foundry production. Heat treatment and pressure treatment of metals" (technical sciences) for the degree of Doctor of technical sciences (DSc).