Formation of the diffusion layer during high-temperature gas carbonitriding of steel 2Kh13

Tarasov, A. N.; Artamonova, G. D.

doi:10.1007/bf00708381

Met Sci Heat Treat

1979

DOI: 10.1007/bf00708381

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Formation of the diffusion layer during high-temperature gas carbonitriding of steel 2Kh13

A. N. Tarasov¹,

G. D. Artamonova²

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1996

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“…In carburizing at 920-950°C without preliminary annealing, diffusion of carbon occurs just as in steel 20Kh13 carburized in the same temperature range in an atmosphere of pyrolysis of liquid hydrocarbons with the introduction of a sodium-containing component [4]. However, in steel 16Kh-VI the interfaces of the surface zone of internal oxidation, the zone of globular carbides, and the austenite-carbide zone are more clearly defined (Fig.…”

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Structure and properties of magnetically soft carburized chromium steel 16Kh-VI

Tarasov¹

1996

Met Sci Heat Treat

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The possibility of using carburized corrosion-resistant steel 16Kh-VI for parts of magnetic systems is estimated from results of an investigation of the properties of diffusion layers and an evaluation of the mechanical characteristics of specimens.High-chromium structural steels 10Kh 13 and 20Kh 13 after carburizing and cyaniding at 900-980°C are used to manufacture parts operating under conditions of contactabrasive wear and certain kinds of fittings and tools. In order to make the use of these steels highly efficient, the technology of preliminary mechanical treatment and the conditions for hardening, tempering, and final polishing of the parts [2 -5] should be chosen with allowance for the special features of the formation of surface diffusion layers in the process of chemicothermal treatment [ 1 -4].We investigated the special features and the possibility of using magnetically soft steel 16Kh-VI in electrical engineering after carburization in activated pastes based on graphite and natural volcanic perlite with additives of ammonium and sodium oxalates [7].Specimens for metallographic analysis, x-ray diffraction and phase analysis, and measurement of magnetic properties and precision parts for microvalves for feeding the working medium in low-power electric motors were produced from industrially manufactured rods of steel 16Kh-VI (Table I).The carburizing regimes were chosen so as to attain optimum magnetic properties of the core, form a homogeneous wear-resistant carbide surface layer, and decrease the negative effect of preliminary high-temperature annealing on selective carburization, i.e., carbidization along boundaries of ferrite grains [6] that decreases the strength. A similar effect is observed in internal oxidation of steels detected in [2 -4].

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confidence: 94%

Structure and properties of magnetically soft carburized chromium steel 16Kh-VI

Tarasov¹

1996

Met Sci Heat Treat

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Formation of the diffusion layer during high-temperature gas carbonitriding of steel 2Kh13

Cited by 1 publication

References 3 publications

Structure and properties of magnetically soft carburized chromium steel 16Kh-VI

Structure and properties of magnetically soft carburized chromium steel 16Kh-VI

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