Features of destruction of nitrided samples of 38H2MYuA and 30H3MA steels

Slavin A.V., Lyakhov A.A., Vishtalyuk A.A., Kuzmina O.V., Gulina I.V., Yakovlev N.O., Grinevich A.V.
UDC
620.172.254:669.14
DOI
10.18577/2307-6046-2021-0-9-76-84
Article PDF (Russian) (832.51 KB)
How to cite
Slavin A.V., Lyakhov A.A., Vishtalyuk A.A., Kuzmina O.V., Gulina I.V., Yakovlev N.O., Grinevich A.V. Features of destruction of nitrided samples of 38H2MYuA and 30H3MA steels // Proceedings of VIAM. 2021. No. 9. DOI: 10.18577/2307-6046-2021-0-9-76-84. URL: https://test.viam.ru/en/journal/2021/9/8
Keywords
chemical-thermal treatment, nitriding, brittle layer, load-bearing capacity, destruction of heterogeneous material, complex stress state.
Abstract

The article deals with the features of deformation and destruction of samples that have undergone chemical-thermal treatment, using the example of testing nitrided samples of steels 38H2MYuA and 30H3MA. It is established that the mechanical properties determined during the tensile testing of samples with a highly rigid brittle layer cannot serve as design characteristics when evaluating the bearing capacity of parts that have undergone chemical-thermal treatment. Testing of nitrided samples of 38H2MYuA and 30H3MA steels demonstrated a complex process of their deformation and destruction, and the test result showed that this steel treated to the «hardened + high tempering» mode sensitivity to the most dangerous concentration the crack is absent.

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