D. A. Rozhentsev, D. O. Chukhvantsev, N. I. Shurov, E. S. Filatov
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Abstract—The liquid-salt boriding of VT1-0 and VT16 titanium to form wear- and heat-resistant diffusion coatings is studied. Boriding is carried out in an oxide melt under various temperature–time conditions. The influence of the main process parameters on the thickness, structure, and phase composition of the formed boride layers is investigated. Under optimum conditions, 60-μm-thick coatings consisting of TiB and TiB2 are found to be fabricated. The optimum holding time for titanium alloys to achieve the required coating thickness is found to be 2–4 h. A negative effect of the refractory alloying components present in the VT16 alloy on the boriding kinetics is revealed: the rate of diffusion boride layer formation decreases. The obtained results are of practical importance for developing technologies to strengthen titanium alloys used under intense wear in aggressive media.
期刊介绍：
Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.
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