Actual Problems in Machine Building 2019 Vol. 6 No. 1-4

Актуальные проблемы в машиностроении. Том 6. № 1-4. 2019 Технологическое оборудование, оснастка и инструменты ____________________________________________________________________ 173 INCREASE OF FATIGUE LONGEVITY OF PARTS BY MEANS OF ITS STAGE HARDENING OF SPD Lebedev V. A. 1 , Ph.D. (Engineering), Professor, e-mail: va.lebidev@yandex.ru Pastukhov F. A. 1 , Lead Engineer, e-mail: vibrotech@mail.ru Chunakhova L.V. 1 , Candidate of Philology, e-mail: dilana@bk.ru Maksimov D.V . 2 , Deputy Chief Technologist, e-mail: dmitriy.v.maximov@gmail.com 1 Don State Technical University, 1 Gagarin Square, Rostov-on-Don, 344010, Russian Federation 2 PJSC "Rostvertol", 5, Novatorov st., Rostov-on-Don, 344038, Russian Federation Abstract The article offers main thesis of a power method of determination of the fatigue longevity of parts, defining power and kinetic substance of various processes of fatigue damageability and destruction of materials in the course of their operation and giving a possibility to solve a number of practical tasks on prediction of the influence of hardening by SPD dynamic methods on the increase of operational properties of car parts. The results of the pilot studies demonstrating efficiency of the impact of additional hardening processing of SPD in the operation of parts on the increase in their fatigue longevity are presented. A special technique has been developed which allows to prove a contribution of the additional hardening processing of SPD to increase in a fatigue longevity of parts from the positions of power approach to the management of the surface layer condition and to choose the most rational production schedules of stage-by-stage hardening of parts by methods of SPD in the course of their operation. Keywords surface plastic deformation, hardening, internal energy, surface layer, fatigue longevity