Formation of alloying layers in a carbon steel by compression plasma flows

Surface Improvement of Low Carbon Steels (St37) by Duplex Treatments

“…The new hard phases were obtained after duplex treatment. Before duplex treatment, there was only -Fe phase in steel structure, but after duplex treatment new phases such as FeN, W3O, -Fe were formed [8][9][10][11][12][13][14][15][16].…”

“…The high cooling rate and solidification of surface melting material could produce very fine microstructure. The microstructure of treated surface will become finer with increasing the number of pulses [16,11].…”

Combined Method of Diffusion Saturation of Steel by Nitrogen

“…Модифицирование структуры и свойств поверхностного слоя металлов и сплавов весьма часто основано на воздействии концентрированными потоками энергии (потоки плазмы, электронные и ионные пучки, лучи лазера и т.д.) или химико-термическом воздействии [2][3][4][5][6][7]. Одним из наиболее распространенных в промышленности методов химико-термической обработки является азотирование, заключающееся в насыщении поверхностного слоя детали азотом при печной обработке или при обработке в плазме тлеющего разряда [8][9][10][11][12].…”

Erosion of materials under the effect of compression plasma flows

“…The coating with a thickness up to 300 nm was clusters formed in the region close to the target and later con densed on its surface, which indicates the quite intense process of ablation of the target. The existence of ero sion should be taken into account during alloying of the surface layer of the material with atoms of the pre liminarily deposited coating [11,12]. The high energy impact on such a system leads to melting of the coating and the surface layer of the substrate and liquid phase mixing of components in the melt due to the penetra tion of the convective flows as a result of the develop ment of the hydrodynamic Kelvin-Helmholtz insta bility in the surface melt.…”