Effect of bulk heat treatment and plasma surface hardening on the microstructure and erosion wear resistance of complex-alloyed cast irons with spheroidal vanadium carbides

Ефременко, В. Г.; Shimizu, Kazumichi; Пастухова, Т. В.; Chabak, Yu. G.; Kusumoto, Kenta; Efremenko, А. V.

doi:10.3103/s1068366617010056

Cited by 25 publications

(4 citation statements)

References 4 publications

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“…Known studies of the effect of paramagnetic and diamagnetic additives, which are practically immiscible with the main component even in the liquid state, on the magnetic properties [4][5][6][7]. Such alloys can be obtained in the form of films by the method of modernized three-electrode ion-plasma spraying (MTIPS) [4,8].…”

Section: Introductionmentioning

confidence: 99%

Effect of chromium additions on the structure and physical properties of manganese-based films

et al. 2021

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The formation of metastable structures of manganese films with chromium additions obtained by the method of modernized three-electrode ion-plasma sputtering is studied. It is shown that the deposition of pure manganese leads to the formation of nanocrystalline β-Mn and MnO oxide. Heating in vacuum above 700 K leads to the film oxidation. The addition of Cr to the composition of the films prevents the formation of MnO oxide. It is shown that the activation energy of structural changes decreases with an increase in the energy of deposited atoms for pure manganese and MnCr films. Magnetization hysteresis is observed only in freshly sprayed Mn and MnCr films.

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Section: Introductionmentioning

confidence: 99%

Effect of chromium additions on the structure and physical properties of manganese-based films

et al. 2021

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“…The barreling during upsetting should not be considered only from a negative point of view. The appearance of dead metal zones near the ends leads to a more quality plastic working of the inner layers of workpiece, macrodot welding, and reduction of grain sizes of metal [2][3][4][5]. During the preparatory upsetting of workpieces for forming of discs forgings, the formed barrel shape contributes to better die cavities filling, i.e.…”

Section: Introductionmentioning

confidence: 99%

Correlation of Barreling Effect with Boundary Friction Coefficient during Upsetting of Various Materials Workpieces under Processing Conditions

Kukhar

Klimov

Chernenko

et al. 2020

MSF

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The necessity of taking into account the barreling effect at the design of die cavities, and open die and closed die forging processes on the basis of pre-forming of billets by upsetting is shown. The division of ideas about the indices of “bulk” and “linear” barreling (barrel shape), which is determined by the ratio of the bulk and linear dimensions of the workpiece after upsetting by flat dies, was made. The functional relation (correlation) between these indices and the friction coefficient on the boundary surface between flat dies and the upsetted workpiece has been determined. The qualitative and quantitative effect of workpiece dimensions (diameter-to-height ratio), strain range, temperature (conditions of cold and hot processing) and type of forming material (structural carbon steel, some of Cu-grades and Al-grades) on the barreling effect and friction coefficient during upsetting was found. The developed method makes it possible to predict a change in the friction coefficient during the upsetting of various material workpiece under given conditions of forming and to monitor their effect to the final shape.

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“…These cathode materials may include the alloys containing eutectic structural constituents like white cast irons [5] and ledeburitic tool steel [16]. The chemical composition of these alloys allows to obtain the coating with high volume fraction of hard carbides which are necessary to improve the resistance to abrasive and abrasive-erosive wear [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Plasma Coating Formation by the Deposition of Cathode Material Eroded Through High-Current Pulsed Discharge

Chabak¹,

Fedun²,

Ефременко³

et al. 2019

Problems of Atomic Science and Technology

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The paper analyzes the conditions for the formation of a coating obtained using an electrothermal axial plasma accelerator due to plasma transfer of cathode erosion products. It is shown that by using a cathode of low-melting materials with a high-current pulsed discharge, microdrops are formed and injected from the accelerator falling into the surface to be treated. When colliding with the surface, the drops acquire near-disk shape with a radius of up to 100 μm, cooling on the substrate at a speed of up to 108 K/s. This leads to the formation in the drops of a supersatu-rated solid solution with nonequilibrium structure. The subsequent heat treatment of the coating can result in harden-ing phases precipitation from solid solution causing the increase in coating microhardness.

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Effect of bulk heat treatment and plasma surface hardening on the microstructure and erosion wear resistance of complex-alloyed cast irons with spheroidal vanadium carbides

Cited by 25 publications

References 4 publications

Effect of chromium additions on the structure and physical properties of manganese-based films

Effect of chromium additions on the structure and physical properties of manganese-based films

Correlation of Barreling Effect with Boundary Friction Coefficient during Upsetting of Various Materials Workpieces under Processing Conditions

Plasma Coating Formation by the Deposition of Cathode Material Eroded Through High-Current Pulsed Discharge

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