▎ 摘　　要

NOVELTY - Increasing nitrogen content of vanadium iron nitride, involves (a) mixing vanadium source, carbonaceous reducing agent, iron powder, and tin dioxide, ball milling under the vacuum to obtain a mixture, (b) heating the mixture to 500-600degrees Celsius for carbonization reaction for 2-4 hours, vacuumizing to 50-100 Pa, introducing nitrogen gas, heating to 600-800degrees Celsius for the first nitridation reaction for more than 5 hours under the nitrogen atmosphere, and finishing the heat preservation; (c) introducing the mixed gas of nitrogen and ammonia, heating to 800-1000degrees Celsius for a second nitridating reaction for more than 3 hours, and (d) finishing the reaction to obtain the vanadium-iron nitride alloy. The vanadium source is vanadium oxide. The vanadium source is vanadium pentoxide and vanadium trioxide. The carbonaceous reducing agent is graphite, activated carbon, or graphene. USE - Method for increasing nitrogen content of vanadium iron nitride used for high-strength thread steel, high strength pipeline steel, and high strength steel. ADVANTAGE - The process is simple, and provides high-quality ferrovanadium nitride iron alloy with high nitrogen content.