湖南电力 ›› 2023, Vol. 43 ›› Issue (3): 60-63.doi: 10.3969/j.issn.1008-0198.2023.03.009

• 研究与试验 • 上一篇    下一篇

钢中Mn的质量分数对热浸镀锌的影响

宋智峰1, 王猛2, 王鑫铭3, 封举宁3, 胡静娴3, 刘艳3, 吴煜3   

  1. 1.湖南大隆环境科技有限公司,湖南 长沙 410000;
    2.湖南宏工智能科技有限公司,湖南 株洲 412000;
    3.湘潭大学材料科学与工程学院,湖南 湘潭 411105
  • 收稿日期:2023-03-27 修回日期:2023-05-04 出版日期:2023-06-25 发布日期:2023-06-25
  • 通信作者: 胡静娴(1991),女,副教授,主要从事材料设计及热力学计算等方面的研究。
  • 作者简介:宋智峰(1981),男,工程师,主要从事工程设备和机器人及相关材料方向的研究。
  • 基金资助:
    国家自然科学基金项目(52171016);国家自然科学基金项目(52201023);湖南省教育厅一般项目(21C0090)

Effect of Mn Content in Steel on Hot Dip Galvanizing

SONG Zhifeng1, WANG Meng2, WANG Xinming3, FENG Juning3, HU Jingxian3, LIU Yan3, WU Yu3   

  1. 1. Hunan Dalong Environmental Technology Co.,Ltd,Changsha 410000, China;
    2. Hunan Honggong Intelligent Technology Co.,Ltd,Zhuzhou 412000, China;
    3. School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105,China
  • Received:2023-03-27 Revised:2023-05-04 Online:2023-06-25 Published:2023-06-25

摘要: 利用扫描电子显微镜、能谱仪等设备,研究纯铁、Fe-0.3%Mn、Fe-0.8%Mn、Fe-1.3%Mn、Fe-1.8%Mn、Fe-2.5%Mn合金在450 ℃纯锌浴中浸镀30~480 s后,Fe-x%Mn合金镀层的组织变化及生长动力学。结果表明:随着Mn质量分数的增大,镀层组织基本为ζ相和δ相,当Mn的质量分数≥1.8%,镀层开始出现裂纹;在Fe-x%Mn合金镀层生长动力学中,随着锰元素的添加,镀层厚度较纯铁镀层都有一定的降低,且随着浸镀时间的延长,镀层厚度的增长速度也在增加,Fe-Mn合金的生长机制主要由扩散机制控制;在浸镀过程中,扩散通道从液相开始、穿过ζ相、进入δ相,锰元素质量分数的增大会使扩散通道向真实合金成分偏离。

关键词: 热浸镀锌, Mn的质量分数, ζ相, δ相

Abstract: The tissue changes and growth kinetics of Fe-x%Mn alloy plating are investigated using scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) instrumentation after immersion plating of pure iron, Fe-0.3%Mn, Fe-0.8%Mn, Fe-1.3%Mn, Fe-1.8%Mn, and Fe-2.5%Mn alloys in a pure zinc bath at 450℃ for 30~480 s. The results show that with the addition of Mn content, the plating organization is basically ζ phase and δ phase, and when the Mn content is 1.8%, cracks began to appear in the plating.In the growth kinetics of Fe-x%Mn alloy plating, the thickness of the plating is reduced compared to that of pure Fe plating,the growth rate of the plating thickness is increased with the extension of the immersion plating time, and the growth mechanism of Fe-Mn alloy is mainly controlled by diffusion mechanism.During the immersion process, the diffusion channels sequentially pass through the liquid phase ζ entry phase δ,and the increase in the mass fraction of manganese in the phase layer will cause the diffusion channel to deviate from the true alloy composition.

Key words: hot dip galvanizing, Mn content, phase ζ, phase δ

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