【摘要】 外加微纳米碳化物强化是改善钢组织和性能有效的手段之一，外加碳化物难点在于如何解决微纳米碳化物的团聚和分散问题。文中综述了前期利用机械热激活制备纳米NbC/Fe和(NbTi)C/Fe复合颗粒，以及纳米NbC和(NbTi)C颗粒对低中碳钢铸态组织和性能影响的研究结果，目的是为纳米碳化物颗粒强化钢的研究提供思路。更多还原

【Abstract】 The reinforcement by external addition micro/nano-sized carbides is one of the effective means to improve the microstructure and properties of steels. The difficulty of external carbide is how to avoid the agglomeration of micro/nano carbides and achieve the uniform distribution in steels. In this paper, the preparation of nano-sized NbC/Fe and(Nb, Ti)C/Fe particles by method of mechanical thermal activation and its effect of nano-sized NbC and(Nb, Ti)C particles on the as-cast microstructure and properties of low and medium carbon steel are reviewed, the aim is to provide ideas for the research steel reinforced by nano-sized carbide particles.更多还原