Improving the Properties of Low-Alloy and Carbon Steel Tools by Cyclic Nitriding

Belashova, I. S.; Петрова, Л. Г.; Александров, В. Д.; Demin, P. E.

doi:10.3103/s1068798x18010057

Cited by 9 publications

(2 citation statements)

References 5 publications

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“…An unique position among such processes is occupied by chemical-thermal treatment (CTT) [6][7]. For example, nitriding is widely used to increase the reliability and durability of a wide range of steels, both structural and tool [8][9]. One of the main advantages of the nitriding process is the ability to control the nitrided layers phase composition in various steels, depending on the required surface properties.…”

Section: Introductionmentioning

confidence: 99%

Nitriding of High Speed Steel for Improvement of Tools Resistance

Петрова¹

2022

Materials Research Proceedings

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Abstract. The article is devoted to the study of the gas nitriding process, which makes it possible to obtain high-quality diffusion layers in high-speed steel M2 on the basis of an internal nitriding zone without a brittle nitride zone. The results of studies of the nitrided steel phase composition with a change of the saturating atmosphere during dilution of ammonia by hydrogen are presented. An increase in the resistance of the nitrided tool when drilling structural steel is shown, which is associated with the dispersion hardening of the internal nitriding zone with tungsten nitrides.

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Section: Introductionmentioning

confidence: 99%

Nitriding of High Speed Steel for Improvement of Tools Resistance

Петрова¹

2022

Materials Research Proceedings

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“…Another way for nitriding acceleration consists in application of staged or cyclic processes with changing of nitriding potential. It was shown that cyclic processes in changing ammonia-air atmospheres provide specific opportunities for phase composition regulation and for achievement of given properties of nitrided surface [5,6].…”

Section: Introductionmentioning

confidence: 99%

Surface Strengthening of High-Alloyed Martensitic Steel by Staged Nitriding

Bibikov

Петрова²,

Belashova³

et al. 2021

MATEC Web Conf.

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Gas nitriding processes with cyclical rotation of ammonia and ammonia/air atmospheres are suggested for surface strengthening of martensitic Cr-Ni-W-Mo-V steel. One-, two-, and three-staged processes were studied differing by gas atmospheres at the final stage of processes. Microstructure and phase composition of received diffusion layers were examined. Results of microhardness, wear and impact toughness tests are discussed in correspondence with the layers structure.

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New nitriding process of high-alloyed maraging steel for cryogenic operation

Belashova

Bibikov

Петрова

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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The paper considers the gas nitriding process with cyclic alternation of atmospheres: ammonia and an ammonia mixture with air for strengthening the corrosion-resistant high-alloyed steel 03Cr11Ni10Mo2Ti, designed to operate at cryogenic temperatures. The formation in steel of a nitrided layer of 130—150μm thickness with increased microhardness (more than 12GPa) is shown experimentally. During the final stage in the ammonia and air environment, iron oxides remain in the compound zone, and a sharp drop in hardness is observed at the border of the core. At the completion of the cyclic process with the stage of saturation in ammonia, a nitrides zone is formed based on the γ′-phase, the layer thickness increases (up to 180(…200μm) and the microhardness profile is smoothed, which reduces the risk of embrittlement.

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Improving the Properties of Low-Alloy and Carbon Steel Tools by Cyclic Nitriding

Cited by 9 publications

References 5 publications

Nitriding of High Speed Steel for Improvement of Tools Resistance

Nitriding of High Speed Steel for Improvement of Tools Resistance

Surface Strengthening of High-Alloyed Martensitic Steel by Staged Nitriding

New nitriding process of high-alloyed maraging steel for cryogenic operation

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