TREATMENT METHOD OF VANADIUM-BASED ALLOYS OF V-4Ti-4Cr SYSTEM

摘要

FIELD: metallurgy.;SUBSTANCE: treatment method of vanadium-based alloys of V-4Ti-4Cr system is proposed. Method involves homogenisation, thermal mechanical treatment and final stabilising annealing. After homogenisation is completed, ingots are heated to 850-1000°C with exposure at this temperature during 1.5-2 hours; extrusion with elongation ratio of 2-5 with further annealing at temperature exceeding the solubility temperature of secondary phases in vacuum of 10^-4 Pa. First, thermal mechanical treatment is performed by means of deformation with deformation degree of 30% at room temperature with further annealing at temperature of 500-600°C, and then, by means of multiple pressing with change of deformation axis along three axes with deformation value of not less than 30% per pass, and final stabilising annealing is performed at 800-900°C.;EFFECT: improving high-temperature strength of vanadium-based alloys.;1 dwg, 1 tbl, 2 ex