Naberezhnye Chelny Institute (branch) of Kazan (Privolzhsky) Federal University (Naberezhnye Chelny, Russia):

V. G. Shibakov, Dr. Eng., Prof., Head of Mechanical Engineering Dept.
D. L. Pankratov, Dr. Eng., Prof., Director of the higher engineering school
R. V. Shibakov, Cand. Eng., Associate Professor
R. S. Nizamov, Graduate Student, e-mail: nizamovrs@yandex.ru

R. A. Khairullin, graduate student of the Naberezhnye Chelny Institute of KFU, took part in the work.

The surface layer after chemical-thermal treatment in structure and physico-mechanical properties differs sharply from the inner layers of the product, which leads to significant internal stresses that cause deformation and warping, i.e. resizing and shape. Prediction of the phase composition, depth of carbon saturation of the layer, microhardness and deformation of the surface of the product elements after chemical-thermal treatment based on modeling in the application package allows even at the stage of technological preparation for the production of precision hot die forging to make adjustments to the geometry of the die tool to increase dimensional accuracy, and accordingly, the durability of the gear ring gears. The input data for modeling the processes of chemical-thermal treatment is a 3D model of the product with a finite element grid and the fixation scheme of the product, temperature and time modes (heating temperature, heating and cooling rate, holding time, number of cycles), type of carburizing cooling medium and its temperature, material details.

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