钛微合金钢研究现状及进展

Research status and progress of titanium microalloyed steel

钛(Ti)微合金钢是通过添加微量元素Ti,以微合金化处理结合控轧控冷技术生产的一种新型钢种。文中从强化机制、热影响区第二相粒子及氧化物冶金工艺3个方面综述了Ti微合金钢的研究进展。对第二相粒子在钢中作用机理的研究表明,精准控制第二相粒子的尺寸、分布、形态、数量是Ti钛微合金钢研究的难点之一;第二相夹杂物诱导针状铁素体形核机理是Ti微合金钢开发的另一个技术难点。

Titanium(Ti) microalloyed steel is a new type of steel produced by adding the trace element Ti,and microalloying treatment with controlled rolling and cooling technology.To provide the theoretical basis for the development of Ti microalloyed steel,the characteristics of Ti microalloyed steel are summarized from the reinforcement mechanism,second phase particles in the heat affected zone and oxide metallurgy process.Combined with the research status of Ti microalloyed steel,considering the mechanism of the second phase particles in steel,the precise control of particle size,distribution,morphology and the number of the second phase is one of the difficulties in the study of Ti microalloyed steel.The nucleation mechanism of inclusion-induced acicular ferrite is another technical difficulty in the development of Ti microalloyed steel.