Surface Hardening of Steel by Electron-Beam Cladding of Ti+С and Ti+B&lt;sub&gt;4&lt;/sub&gt;C Powder Compositions at Air Atmosphere

Laser cladding processing can be found in many industrial applications. A lot of different materials processing were studied in the last years. To improve the process, one may evaluate the phenomena behaviour from a theoretical and computational point of view. In our model, we consider that the phase transition to the melted pool is treated using an absorption coefficient which can underline liquid formation. In the present study, we propose a semi-analytical model. It supposes that melted pool is in first approximation a "sphere", and in consequence, the heat equation is solved in spherical coordinates. Using the Laplace transform, we will solve the heat equation without the assumption that "time" parameter should be interpolated linearly. 3D thermal graphics of the Cu substrate are presented. Our model could be applied also for electron cladding of metals. We make as well a comparison of the cladding method using laser or electron beams. We study the process for different input powers and various beam velocities. The results proved to be in good agreement with data from literature.

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“…For electron beam processing [7], one may consult the Katz and Penfolds absorption law [8] and also Tabata-Ito-Okabe absorption law [9].…”

Section: Simulations and Commentsmentioning

confidence: 99%

Thermal Fields in Laser Cladding Processing: A “Fire Ball” Model. A Theoretical Computational Comparison, Laser Cladding versus Electron Beam Cladding

Oane¹,

Mihăilescu²,

Ristoscu³

2021

Nonlinear Optics - From Solitons to Similaritons

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“…These coatings consist of a mixture of metal and carbides or oxides powders. Currently, the following methods are used to obtain such coatings: laser cladding [6], plasma spraying [7] and deposition [8], and electron-beam cladding [9], to mention a few. Various technologies are applied to treat the surface to grow the nanostructures [10,11], and most of them are grounded on the physical effects occurring at the interaction of the gas-phase [12], plasma [13] or sprayed material [14] with a treated substrate.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Gas Flow with Nanocomposite Carbon-Containing Powders in Supersonic Nozzle

Shorinov¹,

Polyvianyi²

2022

Metallofiz. Noveishie Tekhnol.

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Modern technologies for producing carbon nanostructures are based on many years of experience in the development of coating methods. The latest trends in the formation of carbon nanostructures are associated with complex technological processes of physical and technical treatment, when microstructures are obtained based on traditional methods, which are then completely or partially modified into nanostructures. In this case, the possibility of the formation of a part of nanostructures in a gas flow is considered in order to use them as islands of growth of other nanostructures on the treated surface. The conditions for formation of the specified structures are characterized by the energy state of particles, physical and mechanical properties of particles and substrate materials. The paper presents the results of numerical simulation for determination of velocity and temperature of nanocomposite metalmatrix powder particles in a supersonic nozzle. The necessity to determine parameters of solid particles of powder in a two-phase supersonic flow is determined. Particles velocity and temperature are the crucial parameters which allow for formation of coatings and impact their physical and mechanical properties. The contour plots of velocity and temperature distribution in the nozzle and free space from the nozzle exit to the substrate are obtained. Coating application and its characteristics are considered when selecting coating materials. The numerical simulation is performed for the particles of boron carbide (B4C) and nickel (Ni) powders. The dependence of velocity and

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Creation of heterogeneous metal-ceramic structures based on Ti, Ni and WC, B4C by the combined method of laser cladding and cold gas-dynamic spraying

et al. 2018

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Surface Hardening of Steel by Electron-Beam Cladding of Ti+С and Ti+B<sub>4</sub>C Powder Compositions at Air Atmosphere

Cited by 6 publications

References 11 publications

Thermal Fields in Laser Cladding Processing: A “Fire Ball” Model. A Theoretical Computational Comparison, Laser Cladding versus Electron Beam Cladding

Thermal Fields in Laser Cladding Processing: A “Fire Ball” Model. A Theoretical Computational Comparison, Laser Cladding versus Electron Beam Cladding

Simulation of Gas Flow with Nanocomposite Carbon-Containing Powders in Supersonic Nozzle

Creation of heterogeneous metal-ceramic structures based on Ti, Ni and WC, B4C by the combined method of laser cladding and cold gas-dynamic spraying

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