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首页> 外文期刊>Materials Science and Engineering >Microstructure and mechanical property of in-situ nano-particle strengthened ferritic steel by novel internal oxidation
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Microstructure and mechanical property of in-situ nano-particle strengthened ferritic steel by novel internal oxidation

机译：新型内部氧化原位纳米粒子强化铁素体钢的组织和力学性能

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摘要

A novel route of fabricating nano-particles strengthened ferrite steel was investigated in this study. Rather than by externally adding nano-oxide powders, we adopted the endogenous method of controlling oxide reaction and solute concentration distribution in the process of deoxidization to obtain a high density of in-situ nano-oxide particles homogeneously dispersed in the ferrite matrix in melt. The microstructure and tensile properties of these materials had been investigated to clarify the interrelation between the composition, microstructure and mechanical properties. Transmission electron microscopy (TEM) analysis indicated that these nano-particles were titanium oxides, which have a positive effect on optimizing inclusions and refining grains. Tensile tests revealed that these titanium oxide particles play an important role in increasing the yield strength. The steel has yield strength of 711 MPa, approximately three times higher than that of conventional plain carbon structural steels, and its ultimate tensile strength reaches 810 MPa with an elongation-to-failure value of 22％. Precipitation hardening and grain refinement hardening are the dominant factors responsible for yield strength increasing in this steel.
机译：在这项研究中，研究了一种制造纳米颗粒增强铁素体钢的新途径。与其在外部添加纳米氧化物粉末，不如通过在脱氧过程中控制氧化物反应和溶质浓度分布的内生方法来获得高密度的均匀分布在熔融态铁素体基质中的原位纳米氧化物颗粒。对这些材料的微观结构和拉伸性能进行了研究，以澄清其组成，微观结构和力学性能之间的相互关系。透射电子显微镜（TEM）分析表明，这些纳米粒子是氧化钛，对优化夹杂物和细化晶粒具有积极作用。拉伸试验表明，这些二氧化钛颗粒在提高屈服强度中起重要作用。该钢的屈服强度为711 MPa，约为传统普通碳素结构钢的三倍，其极限抗拉强度达到810 MPa，断裂伸长率为22％。沉淀硬化和晶粒细化硬化是导致这种钢屈服强度提高的主要因素。

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  • 来源
    《Materials Science and Engineering》 |2014年第15期|293-299|共7页
  • 作者

    Hao Tang; Xiaohua Chen; Mingwen Chen; Longfei Zuo; Bin Hou; Zidong Wang;

  • 作者单位

    University of Science and Technology of Beijing, Beijing 100083, PR China;

    State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, PR China;

    University of Science and Technology of Beijing, Beijing 100083, PR China;

    University of Science and Technology of Beijing, Beijing 100083, PR China;

    University of Science and Technology of Beijing, Beijing 100083, PR China;

    University of Science and Technology of Beijing, Beijing 100083, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    in situ nano-particles; Titanium oxide; In melt; Precipitation hardening;

    机译：原位纳米粒子二氧化钛;融化沉淀硬化;

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