低成本V N微合金化高强度钢筋的研究与生产

介绍了低成本V N微合金化高强度钢筋的研究开发及生产情况。在含钒钢筋中增氮，促进了V（CN）的析出，显著提高了V的沉淀强化效果。批量工业性生产试制结果表明：采用V N微合金化技术，HRB400钢筋中的V含量降低至003%~004%，和V钢筋相比，V质量分数降低了50%左右，大大降低了合金成本。适当的轧后加速冷却工艺使V(CN)析出粒子的粒度分布更加优化，可使钢中V含量进一步降低。

Research and Production of Low-Cost V-N Microalloyed Rebars With High Strength

Research and production of low-cost V-N microalloyed rebars with high strength have been reviewed. Enhanced-nitrogen in V-containing rebars promotes precipitation of fine V（CN） particles, and improves markedly precipitation strengthening effectiveness of vanadium. Industrial production results show that, V content in V-N mieroalloyed rebars of 400 MPa level can be as low as 0. 03%-0.04%, which has been reduced by about 50 percent and accordingly drive alloy cost cut down by a large degree. Accelerated cooling process optimizes size distribution of V（CN） particles in V-N rebars and get further low V content.