Corrosion Resistance of Reinforced Layers  of 15х11мф Steel Steam Turbine Blades

Hlushkova, Diana; Bahrov, V.A.; Hrinchenko, O.D.; Hnatiuk, A.A.; Kalinina, N.E.; Kalinin, V.T.

doi:10.46813/2021-132-136

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…For this purpose, various methods are used. For instance, such methods include detonation sputtering [3]; reinforcement of layers of steam turbine blades [4]; obtaining gas-plasma coatings [5,6]; laser treatment [7]; modes of thermal treatment for the purpose of getting the required level of mechanical properties of details [8,9]; nanomodification treatment [10], etc.…”

Section: Introductionmentioning

confidence: 99%

STUDY OF WEAR OF THE BUILDING-UP ZONE OF MARTENSITE-AUSTENITIC AND SECONDARY HARDENING STEELS OF THE Cr-Mn-Ti SYSTEM

Hlushkova¹,

Bagrov²,

Saenko³

et al. 2023

Problems of Atomic Science and Technology

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The work deals with wear of the building-up zone of martensite-austenitic and secondary hardening steels of the Cr-Mn-Ti system (partially alloyed with Mo, B, and V). Additional alloying of the studied steels with titanium in the amount of 2…5% supported avoiding cleavages along the building-up zone. It was determined that there is a 7…15 µm wide parent metal zone next to the weld line. The influence of temperature on the weld toughness of the building-up zone was assessed according to the criterion of Malkin and Tetelman. The microhardness of the surface layers of built-up layers and the range of its dispersion are close to the results of laboratory tests, where ТСт ~ 823 K. This approves the formation of structure of metal of contact volumes with the collective effect of heating, plastic deformation and diffusion. It was experimentally approved that the change of microhardness in the sub-surface layers at the wear stage is justified simultaneously with the processes of mutual diffusion of friction pair materials, selective oxidation and thermodiffusion redistribution of the hardening phase under the influence of temperatures and deformations. The diffusion coefficient in the deformed sub-surface layer, which is up to some dozen micrometers thick, is one of the values providing the kinetics of growing of nuclear cracks and development of destruction cracks. The received results provide an opportunity to use martensite-austenitic and secondary hardening steels of the Cr-Mn-Ti system with built-up surface for the hot forming tools.

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Section: Introductionmentioning

confidence: 99%

STUDY OF WEAR OF THE BUILDING-UP ZONE OF MARTENSITE-AUSTENITIC AND SECONDARY HARDENING STEELS OF THE Cr-Mn-Ti SYSTEM

Hlushkova¹,

Bagrov²,

Saenko³

et al. 2023

Problems of Atomic Science and Technology

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“…Один із факторів, що впливають на довговічність інструменту гарячого деформування, -це температура [12][13][14][15][16][17]. Вплив температури пов'язаний з такими явищами, що відбуваються в поверхневому та підповерхневому шарах [18][19][20][21][22][23][24][25] ( )…”

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Study of the Effect of Structure and Phase Composition on the Wear Resistance of Sparingly Alloyed Metastable and Secondary Hardening Steels

Hlushkova¹,

Bagrov²,

Volchuk³

2023

УЖБА

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Introduction. The paper considers the influence of wear on the formation of a “white band” in metastable austenitic, martensitic-austenitic and secondary hardening steels of the Cr−Mn−Ti system additionally alloyed with Mo, B, V. The influence of the structure and phase composition on the wear resistance of sparing. Results. Surfacing of the studied materials was carried out in copper molds with different rates of forced cooling. Metastable austenitic, martensitic-austenitic and secondary hardening steels of the Cr−Mn−Ti system additionally alloyed with Mo, B, V were studied. Additional alloying of these steels with titanium in an amount of 2...5 % contributed to the prevention of spalling along the fusion zone. Near the fusion line there is a base metal zone with a width of 7...15 µm. After testing at the volume temperature of the working part of the specimen ТV = 553…573 K in the contact volumes of the deposited metal of the 30Kh2V8F type, broadening of the grain boundaries, shear lines, finer grains compared to the underlying layers were revealed. Outside the zone of plastic deformation, the size of the grains corresponds to their sizes before the start of testing, the grain boundaries are relatively thin. The number and location of carbides observed at X430, X80O magnifications are also similar to the structural characteristics of the deposited metal of the 30Kh2V8F type. At close values of the contact pressure in the friction pair, the time of formation of a crack of critical length increases with an increase in the effective surface energy γе (including the energy of plastic deformation). Thus, the crack resistance indices (CR, j-integral, δС) and, consequently, the wear resistance of maraging steels are higher than those of metastable and tool steels. Conclusions. The conducted studies confirm the possibility of the formation of a “white band” both in alloys with a high concentration of elements − austenitizers (Mn, C, Ni), and when alloyed with carbide-forming elements with a relatively low affinity for carbon (V, Mo). The crack resistance indices (CR, j-integral, δС) and, consequently, the wear resistance of maraging steels is higher than those of metastable and tool steels.

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Fractal modeling the mechanical properties of the metal surface after ion-plasma chrome plating

2023

Funct.Mater.

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Corrosion Resistance of Reinforced Layers of 15х11мф Steel Steam Turbine Blades

Cited by 4 publications

References 3 publications

STUDY OF WEAR OF THE BUILDING-UP ZONE OF MARTENSITE-AUSTENITIC AND SECONDARY HARDENING STEELS OF THE Cr-Mn-Ti SYSTEM

STUDY OF WEAR OF THE BUILDING-UP ZONE OF MARTENSITE-AUSTENITIC AND SECONDARY HARDENING STEELS OF THE Cr-Mn-Ti SYSTEM

Study of the Effect of Structure and Phase Composition on the Wear Resistance of Sparingly Alloyed Metastable and Secondary Hardening Steels

Fractal modeling the mechanical properties of the metal surface after ion-plasma chrome plating

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