Saturation of titanium alloys from graphite in a nitrogen-oxygen-containing medium
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We study the kinetics of carbonitriding of VT1-0, OT4, and VT14 titanium alloys in the course of their saturation from graphite in nitrogen. We propose to use nitrogen with an admixture of oxygen, transporting gaseous carbon to the surface of the metal, as a gaseous medium. This intensifies phase formation and enables one to obtain the carbonitride phases at low saturation temperatures (below 850°C), which increases substantially the microhardness and decreases the roughness of the surface. The additional diffusion of oxygen favors an increase in the depth of the gas-saturated layer, and that of carbon leads to its hardening.
KeywordsOxygen Nitrogen Titanium Graphite Structural Material
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