Modification of surface layer of hypoeutectic silumin by electroexplosion alloying followed by electron beam processing

Ivanov, Yurii; Gromov, V. Е.; Zagulyaev, D. V.; Glezer, A. M.; Сундеев, Р.В.; Rubannikova, Yulia; Семин, А. П.

doi:10.1016/j.matlet.2019.05.148

Cited by 12 publications

(6 citation statements)

References 4 publications

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“…phases, their lattice parameters and coherent scattering areas change depending on the electron-beam mode. Such changes are due to the interaction of the electron beam with the irradiated sample [31].…”

Section: Research Results and Discussionmentioning

confidence: 99%

Improving die tooling properties by spraying TiC-Ti-Al and TiB₂-Ti-Al electro-explosive coatings

Романов

2020

Mater. Res. Express

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This article describes increasing wear resistance of 5CrNiMo die steel by more than 5 times. This effect is achieved by creating TiC-Ti-Al and TiB 2 -Ti-Al coatings on the surface of 5CrNiMo die steel. The microhardness of the formed coatings depends on which part of the structure is measured. The microhardness differs by more than 12 times in the matrix material and in the inclusions of titanium carbides and borides. However, the combination of metal matrix composites and the reinforcing inclusions suggests a high complex of properties of the formed coatings. The formation of wearresistant coatings of these systems is carried out by two-stage treatment. At the first stage, electroexplosive spraying of TiC-Ti-Al or TiB 2 -Ti-Al coatings is performed. At the second stage, electronbeam treatment of these coatings is carried out. The structure uniformity during electro-explosive spraying is enforced by specially designed composite conductors, which are electrically exploded. The reason for wear resistance increase is the formation of a multiphase finely dispersed structure in coatings based on TiC, Al 3 Ti, Ti and Ti 3 Al phases for TiC-Ti-Al system and TiB 2 , TiB and AlTi 3 phases for TiB 2 -Ti-Al system. The structure was also studied in detail at the interface between the coatings and the substrate using transmission electron microscopy. The studies of the structure of electroexplosive coatings were compared with the structural features of TiC-Ti-Al composite coatings obtained by the laser cladding technique on the surface of TiAl alloy. Comparison of the findings of the structure obtained by these two different spraying methods revealed both general patterns and characteristic features for each of the coating methods. They relate to features at the interface between the coatings and the substrate, as well as characteristic unitary coating layers.

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Section: Research Results and Discussionmentioning

confidence: 99%

Improving die tooling properties by spraying TiC-Ti-Al and TiB₂-Ti-Al electro-explosive coatings

Романов

2020

Mater. Res. Express

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“…For the surface hardening of tools and machine parts, the following procedures can be applied: thermal impact [11], laser hardening [12], electron-beam processing [13], cryogenic processing [14], flame quenching [15], and the quenching of high-frequency currents [16]. Among the various methods, surface alloying is the most applicable in producing tools from alloy steels after thermochemical treatment [17].…”

Section: Introductionmentioning

confidence: 99%

Impact of Magnetic-Pulse and Chemical-Thermal Treatment on Alloyed Steels’ Surface Layer

et al. 2022

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The relevant problem is searching for up-to-date methods to improve tools and machine parts’ performance due to the hardening of surface layers. This article shows that, after the magnetic-pulse treatment of bearing steel Cr15, its surface microhardness was increased by 40–50% compared to baseline. In this case, the depth of the hardened layer was 0.08–0.1 mm. The magnetic-pulse processing of hard alloys reduces the coefficient of microhardness variation from 0.13 to 0.06. A decrease in the coefficient of variation of wear resistance from 0.48 to 0.27 indicates the increased stability of physical and mechanical properties. The nitriding of alloy steels was accelerated 10-fold that of traditional gas upon receipt of the hardened layer depth of 0.3–0.5 mm. As a result, the surface hardness was increased to 12.7 GPa. Boriding in the nano-dispersed powder was accelerated 2–3-fold compared to existing technologies while ensuring surface hardness up to 21–23 GPa with a boride layer thickness of up to 0.073 mm. Experimental data showed that the cutting tool equipped with inserts from WC92Co8 and WC79TiC15 has a resistance relative to the untreated WC92Co8 higher by 183% and WC85TiC6Co9—than 200%. Depending on alloy steel, nitriding allowed us to raise wear resistance by 120–177%, boriding—by 180–340%, and magneto-pulse treatment—by more than 183–200%.

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“…For each of the modification methods the optimal parameters were determined: for pulsed electron beam treatment they are energy densities of 25, 30, 35 J/cm 2 ; for electroexplosion alloying they are Mode 2 (discharge voltage -2.8 kV, weight of aluminum foil -0.0589 g, weight of yttrium powder Y 2 O 3 -0.0589 g.), and Mode 5 (discharge voltage -2.6 kV, weight of aluminum foil -0.0589 g, weight of yttrium powder Y 2 O 3 -0.0883 g.). Combination of regimes 2 and 5 with subsequent electron beam irradiation at energy density of electron beam 35 J/cm 2 was carried out in paper 20 . This paper continues our research started in [18][19][20][21] .…”

Section: Introductionmentioning

confidence: 99%

“…Combination of regimes 2 and 5 with subsequent electron beam irradiation at energy density of electron beam 35 J/cm 2 was carried out in paper 20 . This paper continues our research started in [18][19][20][21] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Electron-Plasma Treatment on the Microstructure of Al-11wt%Si Alloy

et al. 2020

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The analysis of structure, defect substructure, elemental and phase compounds and friction properties of Al-11wt%Si alloy surface layer of subjected to complex treatment was carried out by methods of scanning and transmission electron microscopy. Complex treatment includes the electroexplosion influence by Al-Y 2 O 3 compound and subsequent electron beam irradiation. The surface layer ≈ 80 μm thick is formed by high-velocity crystallization cells of 0.8-1.3 μm in dimension. Interlayers 50-75 nm thick located along the cells of high-velocity crystallization are enriched by atoms of silicon and yttrium. Complex surface treatment leads to the increase by 18 times in wear resistance and decrease by 1.6 times in the friction factor of the modified layer.

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Modification of surface layer of hypoeutectic silumin by electroexplosion alloying followed by electron beam processing

Cited by 12 publications

References 4 publications

Improving die tooling properties by spraying TiC-Ti-Al and TiB₂-Ti-Al electro-explosive coatings

Improving die tooling properties by spraying TiC-Ti-Al and TiB₂-Ti-Al electro-explosive coatings

Impact of Magnetic-Pulse and Chemical-Thermal Treatment on Alloyed Steels’ Surface Layer

Effect of Electron-Plasma Treatment on the Microstructure of Al-11wt%Si Alloy

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Modification of surface layer of hypoeutectic silumin by electroexplosion alloying followed by electron beam processing

Cited by 12 publications

References 4 publications

Improving die tooling properties by spraying TiC-Ti-Al and TiB2-Ti-Al electro-explosive coatings

Improving die tooling properties by spraying TiC-Ti-Al and TiB2-Ti-Al electro-explosive coatings

Impact of Magnetic-Pulse and Chemical-Thermal Treatment on Alloyed Steels’ Surface Layer

Effect of Electron-Plasma Treatment on the Microstructure of Al-11wt%Si Alloy

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Improving die tooling properties by spraying TiC-Ti-Al and TiB₂-Ti-Al electro-explosive coatings

Improving die tooling properties by spraying TiC-Ti-Al and TiB₂-Ti-Al electro-explosive coatings