Vodíkové skrehnutie Q&P ocelí
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Vysoká škola báňská – Technická univerzita Ostrava
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Abstract
In the theoretical part of this thesis, there are described Q&P steels, their production, chemical composition and retained austenite in these steels. Further, hydrogen embrittlement, its types and its action on steels are described in more detail.
The practical part is focused on the mechanical properties of 42SiCr steel after heat treatment
of Q&P. The properties were investigated after previous electrolytic hydrogenation and
deformation, using different current densities as well as different electrolyte composition. In
addition to mechanical properties, the microstructure of the samples was also studied. In the
last part of the thesis there is a fractographic analysis of individual samples.
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Q&P steel, hydrogen embrittlement, retained austenite, fractographic analysis, mechanical properties