金属热处理 ›› 2020, Vol. 45 ›› Issue (10): 104-107.DOI: 10.13251/j.issn.0254-6051.2020.10.021

• 组织与性能 • 上一篇    下一篇

典型Fe-Cr-Al及Ni-Cr-(Fe)系电热合金丝的显微组织与织构

张强1, 祝志祥1, 陈保安1, 丁一1, 陈新1, 张宁2, 孟利2   

  1. 1.全球能源互联网研究院有限公司 先进输电技术国家重点实验室, 北京 102211;
    2.钢铁研究总院 冶金工艺研究所, 北京 100081
  • 收稿日期:2020-03-22 出版日期:2020-10-25 发布日期:2020-12-29
  • 通讯作者: 孟 利,高级工程师,研究生导师,博士,E-mail: li_meng@126.com
  • 作者简介:张 强(1988—),男,高级工程师,硕士,主要研究方向为电工新材料开发及应用技术,E-mail: zhangqianghgd@126.com。
  • 基金资助:
    高压大功率电热储能炉电阻丝制备及性能优化研究(52550018001J)

Microstructure and texture of typical Fe-Cr-Al and Ni-Cr-(Fe) electrothermal alloy wires

Zhang Qiang1, Zhu Zhixiang1, Chen Baoan1, Ding Yi1, Chen Xin1, Zhang Ning2, Meng Li2   

  1. 1. State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Beijing 102211, China;
    2. Metallurgical Technology Institute, Central Iron & Steel Research Institute, Beijing 100081, China
  • Received:2020-03-22 Online:2020-10-25 Published:2020-12-29

摘要: 选取了两类典型电热合金丝材成品进行了检测,对比分析了合金丝的显微组织及织构,包括Fe-Cr-Al系的国产0Cr25Al5合金与进口0Cr22Al5合金和Ni-Cr-(Fe)系的国产Cr20Ni80合金与Cr20Ni30合金。结果表明:进口Fe-Cr-Al合金的平均晶粒尺寸相对较大,晶粒尺寸分布较为均匀,而织构较弱;国产0Cr25Al5合金的平均晶粒尺寸均匀程度较差,而较粗的样品平均晶粒尺寸较大且织构稍弱,接近于进口Fe-Cr-Al合金,表明较粗的丝材制备形变量较小。Ni-Cr-(Fe)系的合金均表现为不均匀的晶粒组织,而Cr20Ni80合金相较于Cr20Ni30合金的大尺寸晶粒更多;减小合金丝材的直径有细化组织作用,同时还能增强两种Ni-Cr合金丝中均存在的<111>丝织构。

关键词: 电热合金, Fe-Cr-Al合金, Ni-Cr-(Fe)合金, 显微组织, 晶粒尺寸, 织构

Abstract: Two kinds of typical electrothermal Fe-Cr-Al alloy wires including domestic 0Cr25Al5 alloy wire and imported 0Cr22Al5 alloy wire and Ni-Cr-(Fe) alloy wires including domestic Cr20Ni80 and Cr20Ni30 alloy wires were investigated, and the microstructure as well as texture of different samples were compared and analyzed. The results show that more uniform microstructure is observed in imported Fe-Cr-Al alloy wire, in which larger average grain size and weak texture are shown. For the domestic 0Cr25Al5 alloy wires, rather heterogeneous microstructure is displayed, and the weaker texture and higher average grain size in coarser wires are attributed to lower deformation strain during preparation process. Regarding the Ni-Cr-(Fe) alloy wires, heterogeneous microstructures are obtained in both Cr20Ni80 and Cr20Ni30 alloys, but the higher fraction of large grains are shown in Cr20Ni30 alloy wires. The lower wire diameter leads to finer microstructure, as well as strengthening <111> texture which exists in both kinds of Ni-Cr-(Fe) alloy wires.

Key words: electrothermal alloy, Fe-Cr-Al alloy, Ni-Cr-(Fe) alloy, microstructure, grain size, texture

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