Open AccessSTRUCTURE AND PROPERTIES OF BORID AND CARBORBORIDE COATINGS FORMED IN MELTS OF BORON AND CARBON SALTS
Author(s) -
V. A. Teldekov,
Л. М. Гуревич
Publication year - 2020
Publication title -
izvestiâ volgogradskogo gosudarstvennogo tehničeskogo universiteta
Language(s) - English
Resource type - Journals
ISSN - 1990-5297
DOI - 10.35211/1990-5297-2020-2-237-80-86
Subject(s) - borax , boron , corrosion , materials science , metallurgy , diffusion , boriding , boride , carbon steel , carbon fibers , composite material , chemistry , raw material , physics , organic chemistry , composite number , thermodynamics
Qualitative diffusion layers were obtained by boroning steels 40Cr, 20CrNi3, 25CrMnTi at 950 ° C for 3 to 5 hours in a melt based on borax. The melt composition is determined for the simultaneous diffusion of boron and carbon into steel. Comparative tests of heat resistance and corrosion resistance of the obtained diffusion coatings are carried out. Diffusion layers based on iron borides had the best corrosion resistance during long-term tests in a 10 % HCl solution. Corrosion resistance of hardened cemented steel 25CrMnTi is 5-10 times lower than that of boride layers.