Stressed State of Chrome Parts During Diamond Burnishing
M. Bembenek$^{1}$, V. Kopei$^{2}$, L. Ropyak$^{2}$, and K. Levchuk$^{3}$
$^{1}$AGH University of Science and Technology, 30 Adama Mickiewicza Ave., PL-30059 Krakow, Poland
$^{2}$Ивано-Франковский национальный технический университет нефти и газа, ул. Карпатская, 15, 76019 Ивано-Франковск, Украина
$^{3}$Институт металлофизики им. Г. В. Курдюмова НАН Украины, бульв. Академика Вернадского, 36, 03142 Киев, Украина
Получена: 04.01.2023; окончательный вариант - 15.02.2023. Скачать: PDF
A description of strengthening methods increasing the wear resistance and corrosion resistance of the working surfaces of machine parts is provided. It has been established that the chromium coatings are most often used among metal coatings. These coatings are applied to the surface of machine parts in a calm or flowing electrolyte. The advantages of electrochemical chromium plating in flowing electrolytes compared to electrochemical chromium plating in calm electrolytes are substantiated. Chromium plating has been shown to provide a significant increase in wear resistance and corrosion resistance, but causes a decrease in the fatigue strength of steel machine parts. The analysis of mechanical processing operations was carried out—grinding, honing of surfaces with chrome coatings and their diamond burnishing. The work aims to study the effect of diamond burnishing technological modes on the stress-strain state of the electrochemical chromium coating applied to a steel base. A finite-element model of the process of burnishing with a diamond tool chromium coating applied to a cylindrical part made of 40KhN steel was developed. Researched the influence of the depth of diamond burnishing on the stress-strain state of the part with chromium coating. It was established that with the burnishing depth of t = 8 $\mu$m, the residual compressive stresses are at a depth of 80–100 $\mu$m for both investigated coating thicknesses, which will contribute to an increase in the fatigue strength of the parts.
Ключевые слова: electrochemical chromium coating, electrolyte, diamond indenter, long-dimensional parts, Mises stress.
URL: https://mfint.imp.kiev.ua/ru/abstract/v45/i02/0239.html
PACS: 46.15.-x, 46.55.+d, 46.70De, 61.82Bg, 68.35bd, 81.15Pq, 81.40Pq, 82.45Bb