PT  - JOURNAL ARTICLE
AU  - Beneš, Petr
AU  - Vítovec, Vilém
TI  - Selected NDT techniques in heat treatment control
DP  - 2021 Feb 24
TA  - Manufacturing Technology Journal
PG  - 20--28
VI  - 21
IP  - 1
AID - 10.21062/mft.2021.007
IS  - 12132489
AB  - The quality of machine parts is determined not only by the quality of the materials themselves, but also by their heat treatment, which also includes frequently used chemical-thermal processes, such as case-hardening, leading to an increase in the mechanical properties of the surface layers of the material. Heat treatment involves thermal diffusion processes, which are quite complex and therefore there is always a certain probability that the desired material state will not be created. It is therefore desirable to have control methods, preferably of a non-destructive nature, which can detect imperfections and thus prevent future damage that could occur in this way. The paper deals with the use of commonly used non-destructive material testing techniques such as eddy currents, ultrasonic control and acoustic emission method to verify the correctness of thermal and case-hardening processing of steels.