Nb元素的添加对Fe-Co-2V软磁合金微观结构的影响

doi:10.13251/j.issn.0254-6051.2020.02.014

金属热处理 ›› 2020, Vol. 45 ›› Issue (2): 72-75.DOI: 10.13251/j.issn.0254-6051.2020.02.014

Nb元素的添加对Fe-Co-2V软磁合金微观结构的影响

王炫东, 王东玲, 张敬霖, 于一鹏, 吴滨, 张建福

钢铁研究总院功能材料研究所, 北京 100081

收稿日期:2019-09-12 出版日期:2020-02-25 发布日期:2020-04-03
通讯作者: 张建福(1966—),男,硕士生导师,主要研究方向为金属功能材料,联系电话:13501273254,E-mail:13501273254@139.com
作者简介:王炫东(1992—),男,硕士研究生,主要研究方向为FeCo基软磁合金,联系电话:15201128945,E-mail:tony775316@163.com。
基金资助:
中国钢研科技集团青年创新基金(事10620930B)

Effect of Nb addition on microstructure of Fe-Co-2V soft magnetic alloy

Wang Xuandong, Wang Dongling, Zhang Jinglin, Yu Yipeng, Wu Bin, Zhang Jianfu

Division of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081, China

Received:2019-09-12 Online:2020-02-25 Published:2020-04-03

摘要/Abstract

摘要：

Fe-49Co-2V与Fe-49Co-2V-0.3Nb合金经热轧、冷轧制成带材,之后在850 ℃进行2 h退火热处理。使用透射电镜和选区电子衍射对合金微观组织结构进行观察,结果表明Nb元素的添加促进了析出相的形成,析出相为Nb与Co、Fe组成的小尺寸晶粒,不含V元素,其化学式为Co₃Nb,其中部分Co原子被替换为Fe原子。在铸态样品中同样发现了形态不同的析出相,推测可能是带材中析出相的来源。在添加Nb元素的合金中发现条纹状孪晶结构且集中于析出相附近,推测可能与合金伸长率升高及晶粒细化有关。

关键词: Fe-Co软磁合金, 析出相, 选区电子衍射, 退火孪晶

Abstract:

Fe-49Co-2V and Fe-49Co-2V-0.3Nb alloys were hot and cold rolled into sheets respectively, then annealed at 850 ℃ for 2 h. The microstructure of the alloys was investigated by means of transmission electron microscope(TEM) and selected area electron diffraction(SAED). The results show that the adding of Nb facilitates the formation of precipitates, which is small particles composed with Nb, Co and Fe, while V is not detected. The chemical formula of the precipitate is Co₃Nb, in which some Co atoms are partly substituted by Fe atoms. The precipitates in different shapes are also detected in as-cast specimens which might be the source of precipitates in the sheet specimens. In addition, lath-like twin structures are detected closing to the precipitates in the alloy containing Nb, which might be beneficial to the improvement of ductility and grain refinement.

Key words: Fe-Co soft magnetic alloy, precipitation, SAED, annealing twin

中图分类号:

TG113

王炫东, 王东玲, 张敬霖, 于一鹏, 吴滨, 张建福. Nb元素的添加对Fe-Co-2V软磁合金微观结构的影响[J]. 金属热处理, 2020, 45(2): 72-75.

Wang Xuandong, Wang Dongling, Zhang Jinglin, Yu Yipeng, Wu Bin, Zhang Jianfu. Effect of Nb addition on microstructure of Fe-Co-2V soft magnetic alloy[J]. HTM, 2020, 45(2): 72-75.

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Nb元素的添加对Fe-Co-2V软磁合金微观结构的影响

Effect of Nb addition on microstructure of Fe-Co-2V soft magnetic alloy

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