Application of Electrospark Deposition and Modified SHS Electrode Materials to Improve the Endurance of Hot Mill Rolls. Part 2. Structure and Properties of the Formed Coatings

2019 ◽  
Vol 55 (5) ◽  
pp. 502-513 ◽  
Author(s):  
A. E. Kudryashov ◽  
E. I. Zamulaeva ◽  
E. A. Levashov ◽  
F. V. Kiryukhantsev-Korneev ◽  
A. N. Sheveiko ◽  
...  
2019 ◽  
Vol 968 ◽  
pp. 131-142 ◽  
Author(s):  
Viacheslav Tarelnyk ◽  
Ievgen Konoplianchenko ◽  
Nataliia Tarelnyk ◽  
Aleksey Kozachenko

The paper represents a formalized methodology for solving the problem of creating fundamentally new materials, such as "base - coating" ones, which have increased surface wear resistance and relatively high strength and viscosity. Electrospark alloying (ESA) method is proposed as a process for depositing protective coatings on metal surfaces. There are considered the issues of improving the quality of the coatings formed by the ESA method. There is specified a feature of processing the surfaces having been treated with the use of the ESA method, which feature being associated with a relatively small thickness of the layers formed (tens of micrometers). Since to reduce the roughness of the surface, the process of grinding is difficult or even unacceptable to perform, it has been suggested to use the method of surface plastic deformation (SPD). One of the effective SPD methods for finishing the parts is a diamond smoothing process, which, in contrast to running-in with a ball or roller, allows processing the parts of very high hardness values. As a reserve to improve the quality of coatings formed by the ESA method, there is considered a process for producing combined electrospark deposition coatings (CEC) with hard wear-resistant and soft anti-friction metals integrated therein. There are represented the results of mass transfer process investigation performed at forming the CEC on the specimens of steel 45 with indium, tin and copper being used as soft antifriction metals, and tungsten and hard alloy of VK8 grade applied as wear-resistant materials. There is represented a mathematical model for calculating the main ESA technological parameters being necessary for forming the CEC and allowing to predict the weight gain (increase in weight) and size gain (increase in size) at the cathode (the part). It allows predicting the CEC main technological parameters for any electrode pair materials (substrate material and electrode materials making up the CEC).


2005 ◽  
Vol 492-493 ◽  
pp. 359-366
Author(s):  
A.E. Kudryashov ◽  
E.I. Zamulaeva ◽  
P.V. Vakaev ◽  
Yu.S. Pogozhev ◽  
E.A. Levashov

The influence of nanodispersed complex additives (ZrO2, Al2O3, W, WC, WC-Co, NbC, Si3N4) to SHS electrode materials on the mass transfer, structure and properties of electrospark coatings has been considered dependent on variation of the energy regimes of processing. The influence of the pulse discharge energy on the structure, composition, and properties of TRESS coatings has been studied. The optimum energy regimes of depositing high-quality multifunctional graded ESA and TRESS coatings have been found. It has been shown that introduction of nanodispersed complexes into electrode materials promotes improvement of the properties of ESA coatings.


2018 ◽  
Vol 54 (6) ◽  
pp. 535-545
Author(s):  
A. E. Kudryashov ◽  
Zh. V. Eremeeva ◽  
E. A. Levashov ◽  
V. Yu. Lopatin ◽  
A. V. Sevost’yanova ◽  
...  

2016 ◽  
Vol 285 ◽  
pp. 278-288 ◽  
Author(s):  
A.E. Kudryashov ◽  
A.Yu. Potanin ◽  
D.N. Lebedev ◽  
I.V. Sukhorukova ◽  
D.V. Shtansky ◽  
...  

Author(s):  
F.I. Glazunov ◽  
I.A. Danilenko ◽  
T.E. Konstantinova ◽  
V.A. Glazunova ◽  
G.K. Volkova ◽  
...  

2006 ◽  
Vol 515 (3) ◽  
pp. 1161-1165 ◽  
Author(s):  
E.A. Levashov ◽  
P.V. Vakaev ◽  
E.I. Zamulaeva ◽  
A.E. Kudryashov ◽  
Yu.S. Pogozhev ◽  
...  

2014 ◽  
Vol 213 ◽  
pp. 131-136 ◽  
Author(s):  
Alexander Anatolyevich Burkov ◽  
Sergey Anatolyevich Pyachin

Electrospark deposition (ESD) was employed to clad WC-10%Co hard alloy on steel 1035 and the tribological properties of the coatings obtained were examined. The influence of the duration and frequency of discharges, the nature of the environment, and the carbon concentration in the electrode materials on the decarburization of tungsten carbide was studied. It is shown that the degree of tungsten carbide degradation can be reduced by decreasing the discharge frequency and increasing the concentration of carbon in the WC-Co electrode materials and also that the WC decarburization reaction is reversible on annealing.


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