Effect of Volume-Surface Hardening on the Cyclic Strength of Fragments of Solebars of Freight Bogies


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Resumo

The effect of volume-surface hardening (VSH) on the mechanical properties obtained in static and dynamic cyclic endurance tests of fragments of solebars from steel 20GL is studied. The VSH is shown the raise the mechanical properties of the fragments, i.e., the ultimate strength increases by a factor of 1.6 – 2, the conventional yield strength increases by a factor of 1.3 – 1.6, the bearing capacity increases by a factor of 2.6, the endurance limit increases by 10%, and the cyclic strength (durability) in the presence of a stress concentrator in the form of a notch increases by a factor of 3 at preserved high ductility.

Sobre autores

S. Nikulin

NITU “MISiS”

Autor responsável pela correspondência
Email: nikulin@misis.ru
Rússia, Moscow

V. Fedin

Moscow State University of Lines of Communication (MIIT)

Email: nikulin@misis.ru
Rússia, Moscow

A. Rozhnov

NITU “MISiS”

Email: nikulin@misis.ru
Rússia, Moscow

S. Rogachev

NITU “MISiS”

Email: nikulin@misis.ru
Rússia, Moscow

A. Armizonov

MIIT Engineering Company

Email: nikulin@misis.ru
Rússia, Moscow

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