Specific features of cementation of high-chromium martensitic-ferritic 06Kh18ch steel in a pasty carburizer

Keywords

chromium steels, cementation, ferrite, austenite, martensite, hardness, chromium carbides.

Cite as

Mishchenko V. G., Tonkonoh D. M., Bazhmina E. A., Kharchenko A. O., and Kornienko V. V. Specific features of cementation of high-chromium martensitic-ferritic 06Kh18ch steel in a pasty carburizer. Physicochemical Mechanics of Materials. 2025. 61(2), 046-051.

https://doi.org/10.15407/pcmm2025.02.046

Abstract

Martensitic-ferritic steels containing 20–30% martensite uniformly distributed in the plas­tic ferritic matrix were investigated. At a chromium concentration of more than 16% and a carbon content of about 0.06%, the steel undergoes a partial α→γ phase transformation. The presence of an austenite phase at temperatures above 875°C in such steels allows the application of diffusion saturation with carbon and, accordingly, increases the share of the martensitic component. The effect of cementation on the structure and mecha­nical properties of the surface of experimental 06Kh18сh steel and martensitic 95Kh18, 20Kh13 steels, was compared. The change in the structural composition and physico-mechanical properties of 06Kh18сh steel by depth in the process of cementation in a pasty carburizer was investigated. The main advantages and disadvan­tages of the selected mode of chemical and thermal treatment were determined. The expediency of cementation of high-chromium two-phase steels to improve significantly their physico-mechanical and operational properties was confirmed.

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