Abstract
The phase composition and topography of the surfaces of titanium alloys after thermodiffusion saturation from boron carbide depend on the procedure and temperature of saturation. After saturation at temperatures of 800–850°C, a layer of titanium monoboride (TiB) is formed on the surface. As temperature increases to 900–950°C, against the background of a dispersed structure of titanium monoboride, we observe the appearance of islets of titanium diboride (TiB2) responsible for the formation of a two-phase coating. This affects the quality of the surface. The procedure of holding at 850 and 900°C promotes a 1.5–2.5-fold increase in the vertical parameters of the profiles of materials in the case of noncontact saturation and a 2–3.5-fold increase in these parameters in the case of contact saturation. The classes of surface finish decrease by 1 and 2, respectively. At 950°C, we observe the intense growth of grains in the coating. In this case, the quality of the surface degrades by two classes.
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