ПРО СТІЙКІСТЬ ДО АБРАЗИВНОГО ЗНОШУВАННЯ ХРОМОМАРГАНЦЕВИХ СПЛАВІВ У РІЗНИХ СЕРЕДОВИЩАХ
DOI:
https://doi.org/10.34185/1991-7848.itmm.2022.01.006Ключові слова:
CHROMIUM-MANGANESE ALLOY, HARDNESS, ALLOYING, ABRASIVE ENVIRONMENTАнотація
Research in the direction of increasing the service life of iron-based alloys, which operate in difficult conditions, has been carried out. The possibility of using chromium-manganese alloys (cast iron) as a material has been proven. The material is characterized by a lower manufacturing cost compared to traditional ones (high-chromium cast iron and nikorin-type alloy) due to a decrease in the content of chromium, nickel and vanadium. The results of studies of the influence of the chemical and phase composition, structure and hardness of the metal matrix on the abrasive wear of chromium-manganese alloys after the crystallization of castings were presented. Using X-ray diffraction analysis, carbides Me7C3-(Cr, Mn, Fe)7C3, cementite, ferrite and austenite in the structure of chromium-manganese alloys were identified. With an increase in the content of carbon and manganese, the amount of austenite in the matrix increases. An alloy that contains 3.1% C, 13.1% Cr and 15.7% Mn is the most resistant to wear in various abrasive media. This is due to the hardness of the metal matrix, the amount of austenite-carbide eutectic based on Me7C3 carbide, and deformation-phase transformations that occurred during the tests.
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