The phase composition of the diffusion layer, depending on conditions processing

Purpose. To determine the effect of the preliminary of plastic prestraining in the structure, mechanical properties and the process of saturation of the low-carbon boron alloy. Methodology. The material chosen for the study was low carbon steel, which is pre-annealed at 1223 K for five hours and then of plastic prestraining at a load conditions. The phase composition, physical properties of the layer after the samples deformation with a degree of 0-40% and with different contents of boron carbide in the saturating environment. Findings. Complex conducted studies have shown that the formation of the phase composition of the layer after saturation in a thickness of layer containing boron, is greatly influenced by not only the content of boron carbide in the layer, but also of the preliminary of plastic prestraining. At the same time, it is revealed that the plastic prestraining and boron diffusion increases the carbon activity. Originality. The steel structure is mounted and the phase depth of the diffusion zone depending on the boron carbide content of the layer and of the preliminary plastic prestraining. Practical value. These laws, which give a description of the structural components and the conditions of their formation allow to predict the mechanical properties of the layer.