Molten steel vanadium-nitrogen microalloying method

The invention belongs to the technical field of steelmaking, relates to a molten steel vanadium-nitrogen microalloying method, and provides a method for adding vanadium into molten steel with sufficient nitrogen content to more easily realize uniform mixing of a vanadium element and a nitrogen element and reduce the amount of the nitrogen element and the amount of the vanadium element existing in a free state form, and specifically adopts a process of blowing nitrogen firstly and then supplementing part of vanadium-containing alloy. The number of free nitrogen atoms and vanadium atoms is reduced; and a ladle bottom nitrogen blowing process is adjusted, so that the content of nitrogen in the molten steel is increased. 本发明属于炼钢技术领域，涉及一种钢水钒氮微合金化方法，提出把"钒加到氮含量充足的钢水中"更容易实现钒元素和氮元素的均匀混合，减少以游离态形式存在的氮元素量和钒元素量，并具体采用先吹氮气，再补加部分含钒合金的工艺，以减少游离态氮原子和钒原子数量；并调整钢包底吹氮气工艺，提高钢水中氮元素的含量。