Effect of Incomplete Replacement of Cr for Cu in the Deposited Alloy of Fe–C–Cr–B–Ti Alloying System with a Medium Boron Content (0.5% wt.) on its Corrosion Resistance
B. O. Trembach$^{1}$, M. G. Sukov$^{1}$, V. A. Vynar$^{2}$, I. O. Trembach$^{1,3}$, V. V. Subbotinа$^{4}$, O. Yu. Rebrov$^{4}$, O. M. Rebrova$^{4}$, V. I. Zakiev$^{5,6}$
$^{1}$Частное акционерное общество «Новокраматорский машиностроительный завод», ул. Олекса Тихого, 5, 84305 Краматорск, Украина
$^{2}$Физико-механический институт им. Г. В. Карпенка НАН Украины, ул. Наукова, 5, 79060 Львов, Украина
$^{3}$Донбасская государственная машиностроительная академия, ул. Академическая, 72, 84313 Краматорск, Украина
$^{4}$Национальный технический университет «Харьковский политехнический институт», ул. Кирпичева, 2, 61002 Харьков, Украина
$^{5}$Национальный авиационный университет, просп. Любомира Гузара, 1, 03058 Киев, Украина
$^{6}$Национальный технический университет Украины «Киевский политехнический институт имени Игоря Сикорского», просп. Победы, 37, 03056 Киев, Украина
Получена: 24.02.2022. Скачать: PDF
In this research, the corrosion behaviour of the Fe–C–Cr–B–Ti alloying system deposited alloys applied by flux-cored arc welding are studied. Samples of deposited alloy with a high content of chromium (13% by weight of Cr) received with self-shielded flux-cored wire electrode without exothermic additions are investigated. For comparison, the deposited alloy received from self-shielded flux-cored wire with exothermal addition (CuO–Al) introduced to the core filler is also analyzed. It provides a low content of chromium (4% wt.) and a high content of copper (7% wt. Cu). The corrosion resistance of the deposited alloys layers is measured based on the results of potentiostatic polarization testing. After comparison of the corrosion current density Icorr and the corrosion electrode potential value Ecorr, measured for the 140Cr13Si1MnBTi and 110Cr4Cu7TiVBAl deposited alloys layers as found, these values varied from 1.525 mA/cm$^2$ to 0.166 mA/cm$^2$ and from 0.359 mV to 0.631 mV depending on the alloyed layers composition. Results of the studies are shown that the introduction of exothermic addition (CuO–Al) to the core filler of the flux-cored wire provides the highest resistance of the deposited alloy to corrosion due to additional alloying by copper. Thus, the proposed partial replacement of chromium with an equivalent amount of copper has a positive effect on the corrosion resistance increasing of Fe–C–Cr–B–Ti alloying system deposited alloy.
Ключевые слова: hardfacing, Fe–C–Cr–B–Ti alloys, self-shielded flux-cored arc welding, copper, exothermic addition, CuO–Al, SEM, corrosion resistance, potentiodynamic polarization.
URL: https://mfint.imp.kiev.ua/ru/abstract/v44/i04/0493.html
PACS: 46.15.-x, 46.55.+d, 68.35.bd, 81.15.Pq, 81.40.Pq, 82.45.Bb