Modification of Surface Layers of Stainless Steel AISI 420 by a Combination of Thermal and Ultrasonic Impact Influence
A. P. Burmak$^{1}$, M. O. Vasylyev$^{2}$, V. I. Zakiev$^{1,3}$, М. М. Voron$^{4}$, S. M. Voloshko$^{1}$
$^{1}$National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Peremohy Ave., UA-03056 Kyiv, Ukraine
$^{2}$G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{3}$National Aviation University, 1 Lyubomyr Huzar Ave., UA-03058 Kyiv, Ukraine
$^{4}$Physico-Technological Institute of Metals and Alloys, NAS of Ukraine, 34/1 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
Received: 31.03.2022; final version - 27.04.2022. Download: PDF
The influence of ultrasonic impact treatment (UIT) on the microhardness, roughness and structural-phase state of the stainless steel AISI 420 surface is studied. Ultrasonic impact treatment is performed in an inert environment under the same conditions—the amplitude of the hub end was 25 $\mu$m, the duration of treatment—50 s. Samples of AISI 420 steel are used after softening heat treatment at annealing temperature of 800°C (initial state), after additional hardening from 980°C with oil cooling and after additional hardening from 980°C with subsequent annealing at 250°C for one hour. As established, that after UIT there is a significant decrease in the roughness of the modified surface and increase in microhardness for all cases compared to the initial state. Taking into account the data of x-ray diffraction analysis the main factors of stainless steel AISI 420 surface layers deformation hardening under different combinations of thermal and ultrasonic impact are discussed.
Key words: stainless steel, surface morphology, microhardness, deformation, stress, ultrasonic impact treatment, heat treatment.
URL: https://mfint.imp.kiev.ua/en/abstract/v44/i06/0751.html
DOI: https://doi.org/10.15407/mfint.44.06.0751
PACS: 43.35.+d, 61.72.Ff, 81.65.-b, 83.10.-y, 83.10.Tv
Citation: A. P. Burmak, M. O. Vasylyev, V. I. Zakiev, М. М. Voron, and S. M. Voloshko, Modification of Surface Layers of Stainless Steel AISI 420 by a Combination of Thermal and Ultrasonic Impact Influence, Metallofiz. Noveishie Tekhnol., 44, No. 6: 751—768 (2022) (in Ukrainian)