黄耀,赵爱民,杨靖波,王旭明,韩军科,党会学

• 1:中国电力科学研究院
• 2:北京科技大学冶金工程研究院
• 3:现代交通金属材料与加工技术北京实验室

摘要(Abstract)：

利用光学显微镜和力学性能测试方法,研究了不同N含量下热轧结构钢组织和力学性能差异;同时采用透射电镜和化学物相分析的方法,观察和分析了析出相粒子的形态和分布情况。结果表明,对结构钢中增N可有效促进纳米碳化物的析出,从而制备出抗拉强度达815 MPa、总伸长率达23%的超高强输电铁塔钢;当N增加至4.2×10-4时并不明显降低冲击韧性,-40℃冲击条件下冲击功为33.3 J/mm2。N含量增加能明显促进V(C,N)的析出和析出物尺寸的细化,同时减小V(C,N)相间析出的排间距,提高1~10 nm粒子的体积分数,从而提供最强的析出沉淀强化作用,提高钢的力学性能。

关键词(KeyWords)： V(C,N);输电铁塔钢;析出强化;相间析出

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51308519);; 中国高校博士点专项基金(20110006110007)

作者(Author): 黄耀,赵爱民,杨靖波,王旭明,韩军科,党会学

DOI: 10.13289/j.issn.1009-6264.2015.07.013

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