METHOD OF CHEMICAL-THERMAL TREATMENT OF VANADIUM ALLOYS ALLOYED WITH CHROME AND TITANIUM Russian patent published in 2012 - IPC C22F1/18 C21D8/10 

FIELD: metallurgy.

SUBSTANCE: method of thermomechanical treatment of semi-finished products from an alloy based on vanadium alloyed with chrome and titanium includes homogenisation baking of semi-finished products at temperature exceeding temperature of secondary phases solubility, multiple thermomechanical treatment, including plastic deformation and baking, and the final stabilising baking at the temperature of 950-1100°C. At the initial stages of multiple thermomechanical treatment, thermodiffusion oxidation is carried out, including thermal treatment on air to produce oxide films, vacuum baking at temperatures T=(450÷700)°C to absorb oxygen contained in an oxide film, by a surface layer of semi-finished products with further thermal treatment in vacuum to provide for homogeneous distribution of oxygen by thickness of semi-finished products.

EFFECT: higher high-temperature strength of alloys.

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