研究了钒在连续冷却淬火贝氏体球墨铸铁中的存在形式和作用，以及对球墨铸铁贝氏体组织和性能的影响机制．结果表明：钒在贝氏体球墨铸铁中以固溶和弥散碳化物２种形式存在，它能有效地增加贝氏体形核率，促进贝氏体转变，细化贝氏体组织，强化基体，提高硬度．因此，钒可替代钼、镍、硼等元素生产贝氏体球铁． The existence form and function of vanadium in continuous cooling bainite ductile iron and the influence mechanism on the microstructure and properties of bainite cast iron bainite were studied. The results show that vanadium exists in bainitic ductile iron with two forms of solid solution and dispersed carbide. It can effectively increase the nucleation rate of bainite, promote the transformation of bainite, refine the bainite structure, strengthen the matrix, Increase hardness. Therefore, vanadium can replace molybdenum, nickel, boron and other elements to produce bainitic ductile iron.