Influence of the Deformation Mode on the Force Conditions of Formation of the Surface Nanostructure of 40Kh Steel

Kyryliv, V. І.; Gurey, Volodymyr; Maksymiv, Olha; Hurey, Ihor; Kulyk, Yu. О.

doi:10.1007/s11003-021-00556-9

Cited by 12 publications

(14 citation statements)

References 12 publications

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“…Consequently, a load of approx. 0.8−1.0 GPa is induced in the contact zone, which was estimated by analysing the relationship between the applied load and the area of the friction contact zone during the MPT [31]. Additionally, a technological medium is applied to the processing area during the MPT.…”

Section: The Technology Of Mptmentioning

confidence: 99%

“…Usually, the SPD is imposed on the surface layers by unidirectional shear strain (hot rolling and sliding, etc.). To induce multidirectional deformation during the generation of the surface NCSs using MPT, a special strengthening tool with oppositely directed grooves (on the tool's periphery) was developed [31]. It was demonstrated [31] that it enables the formation of a nanostructure with a lower energy expenditure and higher dislocation density and, therefore, with a lower grain size in the top surface layer and a greater thickness compared with that which is generated using unidirectional deformation.…”

Section: Introductionmentioning

confidence: 99%

“…To induce multidirectional deformation during the generation of the surface NCSs using MPT, a special strengthening tool with oppositely directed grooves (on the tool's periphery) was developed [31]. It was demonstrated [31] that it enables the formation of a nanostructure with a lower energy expenditure and higher dislocation density and, therefore, with a lower grain size in the top surface layer and a greater thickness compared with that which is generated using unidirectional deformation. The application of a multidirectional SPD resulted in increasing wear resistance, contact, and corrosion fatigue, and the decreasing hydrogen permeability of the nanostructured materials [11,[32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

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The Mode Deformation Effect on Surface Nanocrystalline Structure Formation and Wear Resistance of Steel 41Cr4

et al. 2023

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A surface nanocrystalline steel layer in the low alloy steel 41Cr4 was fabricated by using mechanical-pulse treatment (MPT) with different deformation modes. The structure parameters, the physical and mechanical properties, the wear resistance, and the surface topography parameters of the treated steel depending on the deformation mode were investigated. A tool with a smooth working surface was used for inducing unidirectional deformation in the top surface layer (shear), and a tool with the oppositely directed grooves was used for generating multidirectional deformation. The surface layer with a nanocrystalline structure formed by MPT using both of the tools was characterised by enhanced mechanical properties and wear resistance compared with those of the untreated or heat-treated steels. Inducing multidirectional deformation during the MPT resulted in a decrease in the grain size and an increase in the depth and microhardness of the surface layer due to it facilitating the generation of dislocations compared to those formed under unidirectional deformation. The results also demonstrated that favourable surface topography parameters providing the highest wear resistance of the steel were obtained at MPT using multidirectional deformation.

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Section: The Technology Of Mptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Mode Deformation Effect on Surface Nanocrystalline Structure Formation and Wear Resistance of Steel 41Cr4

et al. 2023

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“…Thermodeformation treatment (TDT) is a method of reinforcing the working surfaces of machine parts. This treatment combines two methods: the action of a highly concentrated energy source and the intense plastic deformation of the metal of the surface layer of the treated surfaces [41,42]. A highly concentrated energy source arises in the process of the high-speed friction (60-90 m/s) of the tool on the treated surface in the contact zone [43,44].…”

Section: Introductionmentioning

confidence: 99%

Resistance to Wear during Friction without Lubrication of Steel-Cast Iron Pairing with Nanocrystalline Structure-Reinforced Surface Layers

Hurey,

Maruschak,

Augousti

et al. 2023

Lubricants

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During the TDT of 41Cr4 steel specimens, a uniformly reinforced white layer with a nano-crystalline structure is formed in the surface layers. The wear resistance of sliding friction without the lubrication of a pair of steel 41Cr4—grey cast iron EN-GJL-200 (EN) under the face-to-face (“ring-ring”) scheme has been studied. It is revealed that when the sliding velocity changes from 0.25 m/s to 4 m/s and the unit load changes from 0.2 MPa to 1.0 MPa, a pair with a reinforced surface layer on 41Cr4 steel specimens and unreinforced specimens of EN-GJL-200 (EN) grey cast iron has a higher wear resistance than an unreinforced pair. The wear resistance increases for both reinforced and not reinforced specimens operating in a friction pair.

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“…The favorable combination of properties between the reinforced surface layer and the base metal can be achieved by using various surface engineering processes. Extension of the service life of critical parts is provided by the methods of hardening using surface deformation [ 40 , 41 ], electrochemical Cr plating [ 42 , 43 ], chemical-thermal treatment [ 44 , 45 ], electrospark doping [ 46 , 47 ], laser doping [ 48 , 49 , 50 ], laser cladding [ 51 ], plasma hardening [ 52 , 53 ], thermal spraying [ 54 , 55 ], supersonic spraying [ 56 , 57 , 58 ], vacuum-arc deposition [ 59 , 60 , 61 ], formation of oxide and nitride coatings by combined methods [ 62 , 63 , 64 , 65 , 66 , 67 ], manual arc hardfacing [ 68 , 69 ], and flux-cored arc welding [ 70 , 71 , 72 , 73 , 74 , 75 , 76 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Wear Characterization of the Fe-Mo-B-C—Based Hardfacing Alloys Deposited by Flux-Cored Arc Welding

et al. 2022

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An analysis of common reinforcement methods of machine parts and theoretical bases for the selection of their chemical composition were carried out. Prospects for using flux-cored arc welding (FCAW) to restore and increase the wear resistance of machine parts in industries such as metallurgy, agricultural, wood processing, and oil industry were presented. It is noted that conventional series electrodes made of tungsten carbide are expensive, which limits their widespread use in some industries. The scope of this work includes the development of the chemical composition of tungsten-free hardfacing alloys based on the Fe-Mo-B-C system and hardfacing technology and the investigation of the microstructure and the mechanical properties of the developed hardfacing alloys. The composition of the hardfacing alloys was developed by extending the Fe-Mo-B-C system with Ti and Mn. The determination of wear resistance under abrasion and impact-abrasion wear test conditions and the hardness measurement by means of indentation and SEM analysis of the microstructures was completed. The results obtained show that the use of pure metal powders as starting components for electrodes based on the Fe-Mo-B-C system leads to the formation of a wear-resistant phase Fe(Mo,B)2 during FCAW. The addition of Ti and Mn results in a significant increase in abrasion and impact-abrasion wear resistance by 1.2 and 1.3 times, respectively.

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Influence of the Deformation Mode on the Force Conditions of Formation of the Surface Nanostructure of 40Kh Steel

Cited by 12 publications

References 12 publications

The Mode Deformation Effect on Surface Nanocrystalline Structure Formation and Wear Resistance of Steel 41Cr4

The Mode Deformation Effect on Surface Nanocrystalline Structure Formation and Wear Resistance of Steel 41Cr4

Resistance to Wear during Friction without Lubrication of Steel-Cast Iron Pairing with Nanocrystalline Structure-Reinforced Surface Layers

Microstructure and Wear Characterization of the Fe-Mo-B-C—Based Hardfacing Alloys Deposited by Flux-Cored Arc Welding

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