About the article
V.V. IZMAILOV, Dr. Sc., L.E. AFANASIEVA, Cand. Sc., M.V. NOVOSELOVA, Cand. Sc.
The article continues the publication of the results of the authors' research on the prediction of wear of parts with a hardness gradient along the depth of the material resulting from machining or the use of hardening techniques. To describe the change in the hardness of a material with distance from the friction surface, a more universal analytical dependence was obtained than in previous works of the authors. The previously proposed formulas are particular cases of this more general relationship. On the basis of the analytical dependence describing the change in hardness with depth of the material, the J. Archard equation known in tribology for estimating the amount of wear is extended to the case of surface wear with a hardness gradient in depth. A formula was also obtained for predicting the resource of a friction joint according to the criterion of acceptable wear. A specific example of resource estimation in the form of a friction path value, on which the limiting value of linear wear is reached, is given. It is shown that ignoring the hardness gradient when estimating the service life of friction joint can lead to a significant error.
трение, изнашивание, упрочнение поверхности, градиент твердости, ресурс, прогнозирование