钒微合金化钢的技术进展与应用

摘要：介绍了钒微合金化技术的最新进展以及钒钢的开发与应用情况。氮是含钒钢中有效的合金元素，含钒钢中增氮，优化了钒在钢中的析出，显著提高沉淀强化效果。采用钒氮微合金化设计，配合适当的轧制工艺，促进V(C,N)在奥氏体中析出，起到了晶内铁素体形核核心作用，实现了含钒钢的晶粒细化。最新的研究成果表明钒微合金化可以提高双相钢、贝氏体钢、相变诱导塑性钢、孪晶诱导塑性钢、热成型马氏体钢等汽车用先进高强度钢的强度并改善使用性能，显示出良好的应用前景。钒氮微合金化技术在中国高强度钢筋、高强度型钢、非调质钢、薄板坯连铸连轧高强度带钢等产品中获得广泛应用，大大促进了中国钒微合金化钢的发展。

Recent development and applications of vanadium microalloying technology

The recent developments of V microalloying technology and its applications in HSLA steels were reviewed. Enhanced N in V microalloyed steels promote precipitation of fine V(C,N) particles, and improves markedly precipitation strengthening effectiveness of vanadium. V N process can be used effectively to refine ferrite grain size by the nucleation of intragranular ferrite promoted by V(C,N) precipitates in austenite. The latest research results show the potential benefits of V microalloying technology to advanced high strength steels (AHSS) for the automotive sector including DP steels, bainitic steel, TRIP steels and TWIP steels, etc. The wide applications of V N process in high strength rebars, section steels, forging steels and thin slab direct rolling strips, etc., had greatly promoted the rapid development of V microalloyed steels in China.