The separate or combined addition of micro-alloying elements to the conventional weathering steel is usually applied in producing higher yield strength weathering steels.The target-oriented researches on the Vanadium-containing weathering steels were conducted in this paper in order to combine with the advantage of vanadium resource at Panzhihua Iron & steel(group)Co...A Glbeele-3500 thermal simulator was used to investigate the effect of the deformation amount and the nitrogen content on the precipitation –temperature-time(PTT)curves of the vanadium-containing weathering steel and relationship between the nitrogen content or the deformation amount,temperature and precipitation time was analyzed.It has been found that the PTT curves of test samples are C curve shape.The temperature corresponding to the shortest time of precipitation is also found.Increasing the nitrogen content will make PTT curve move to the left significantly.Additionally,increasing deformation amount can also accelerate the precipitation rate of V(C,N)in the austenite and makes PTT curve move to the left obviously.It has also been found that the more the deformation amount,the shorter the start time of the V(C,N)precipitation.The study offers the essential technical support for the further development of products.