Characteristics of excess phase in cast high-manganese steel

Вдовин, К. Н.; Gorlenko, D. A.; Феоктистов, Н. А.

doi:10.3103/s0967091216070159

Cited by 10 publications

(5 citation statements)

References 4 publications

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“…The second and the third reactions are endothermal ones corresponding to the dissolving of the excess phase. In accordance with the previous investigations [15], the cast structure of Hadfield steel contains two kinds of excess phase. The first one is phosphide eutectic, the second one is cementite alloyed with manganese.…”

Section: Solid State Phenomena Vol 265supporting

confidence: 88%

“…Beside the chemical composition, the wear resistance of high manganese steel is influenced by a number of factors, such as: the cooling rate of the melt in a casting mould [14], quantitative characteristics of the excess phase [15,16] and stacking fault energy of austenite [17,19], which determines the mechanisms of deformation transformations in this steel and formation of the hardened layer in the process of wear.…”

Section: Problem Statementmentioning

confidence: 99%

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Influence of Heat Treatment on Wear Resistance of Alloyed Hadfield Steel and Phase Transformations in it

Вдовин

Феоктистов

Gorlenko

2017

SSP

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The paper investigates the influence of alloying of high manganese steel with various materials on its wear resistance. It describes the results of differential scanning calorimetry and thermo-gravimetric analysis obtained in the process of thermal investigation of high manganese steel alloyed with different materials. The processes taking place in alloyed high manganese steel during heat treatment were considered. Besides, the paper shows the results of investigation of kinetics of oxidation of high manganese steels, temperatures of the start and completion of carbide decomposition and carbon burning; the comparative analysis of these processes was carried out. The research group determined the qualitative characteristics of the steel decarburization process depending on the implemented alloying scheme of high manganese steel. Scientific justification was given to the results obtained in the research work. The technological recommendations, which make it possible to calculate the optimum hardening temperature of high manganese steels, were given. General conclusions were made in the final part of the paper.

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Section: Solid State Phenomena Vol 265supporting

confidence: 88%

Section: Problem Statementmentioning

confidence: 99%

Influence of Heat Treatment on Wear Resistance of Alloyed Hadfield Steel and Phase Transformations in it

Вдовин

Феоктистов

Gorlenko

2017

SSP

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“…Thus, it can be argued that the upper finely dispersed (amorphized) layer has higher tribotechnical characteristics. Moreover, the breaking-in period is significantly reduced, which is an important indicator, given that at the stage of breaking-in of friction pairs, the wear value can be up to 60 % of the total wear tolerance [18][19][20][21][22][23][24][25][26][27]. These circumstances largely explain the mechanism and the main factors determining the increase in the tribological properties of the studied friction pair during laser thermal strengthening, namely, by increasing the bearing capacity, increasing microhardness, and improving the wear conditions of the modified layer.…”

Section: Discussionmentioning

confidence: 99%

Laser Modification of the "Ring-Cylinder Liner" Mating Surfaces

Shastin

Kargapoltsev

2020

KEM

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The article focuses on the topical issues of studying the microstructure, physical-and-mechanical and tribological parameters of the surface layers of a “ring-cylinder liner” friction pair subjected to laser processing. The analysis of the main defects of the elements of the cylinder-piston group of the internal combustion engine, methods for their recovery and increase of tribotechnical characteristics has been carried out. It is noted that the most effective means of increasing the wear resistance of the “ring-cylinder liner” friction pair are various types of heat and chemical-heat treatment of the working surface of the link. As a result of tribological studies, it was found that there is an increase in the wear resistance of a “ring – cylinder liner” friction pair in all the investigated laser exposure modes, taking into account the identified boundary processing conditions for one and the other interfacing elements. The maximum value of wear resistance is observed during laser thermal strengthening of both mating surfaces, at critical levels of laser energy density, which do not cause melting and microcracks in the surface layer. In this case, the wear resistance of the modified surface of the cylinder liner can increase 4.5...5 times, and more than three times for the piston rings.

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“…In addition, in the process of wear there is a gradual decrease in the contact area and the magnitude of the specific stresses on the contact surface. This entails a gradual and slow decrease in the intensity of wear and the tilt of the wear curve of the heatstrengthened surface [12][13][14][15][16][17][18][19][20].…”

Section: Theoretical Wear Modelmentioning

confidence: 99%

Laser Modification: Increasing the Wear Resistance of Friction Surfaces

Shastin

Kargapoltsev

2020

KEM

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The article deals with topical issues of studying the physical, mechanical and tribological parameters of the surface layer of machine parts subjected to laser processing. Various options for modifying mating surfaces are evaluated and analyzed. The data of microstructural analysis and indicators of wear resistance are presented. A theoretical model of the wear of heat-strengthened surfaces is proposed, explaining the mechanism for increasing their wear resistance as a result of homogenization of the microstructure of a special surface layer with increased bearing capacity. It is experimentally confirmed that the greatest wear resistance is observed in friction units during mutual modification of mating surfaces.

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Characteristics of excess phase in cast high-manganese steel

Cited by 10 publications

References 4 publications

Influence of Heat Treatment on Wear Resistance of Alloyed Hadfield Steel and Phase Transformations in it

Influence of Heat Treatment on Wear Resistance of Alloyed Hadfield Steel and Phase Transformations in it

Laser Modification of the "Ring-Cylinder Liner" Mating Surfaces

Laser Modification: Increasing the Wear Resistance of Friction Surfaces

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