胡日荣,武会宾,蔡庆伍,唐荻,郭爱民,张永青

• 1:北京科技大学冶金工程研究院
• 2:中信微合金化技术中心

摘要(Abstract)：

通过光学显微镜、扫描电子显微镜、透射电子显微镜以及力学分析等方法研究了Nb对高强耐磨钢组织和力学性能的影响,并讨论了含Nb耐磨钢的强韧化机理。结果表明,在200℃回火时,实验用钢展示了较好的力学性能;随着回火温度的提高,实验钢的力学性能逐渐下降。加入少量的Nb元素,一方面在加热过程中抑制了晶粒的长大,另一方面在轧制过程中形变诱导析出NbC析出抑制了晶粒的回复和再结晶,保留了较大的位错密度,在细晶强化、析出强化和位错强化的共同作用下,含Nb钢展示了更为优越的力学性能,并且Nb元素能够抑制渗碳体的形成,防止由于回火脆性造成韧性的大幅下降。

关键词(KeyWords)： Nb微合金化钢;耐磨钢;析出;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家“863”计划资助项目(2012AA03A508);; 中信-CBMM R&D资助项目

作者(Author): 胡日荣,武会宾,蔡庆伍,唐荻,郭爱民,张永青

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