新型热镀锌双相钢的合金成分对界面层和镀层结构的影响

doi:10.11901/1005.3093.2023.424

材料研究学报

2024, Vol. 38

Issue (6): 446-452 DOI: 10.11901/1005.3093.2023.424

研究论文

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新型热镀锌双相钢的合金成分对界面层和镀层结构的影响

李沅沅¹, 梁健¹, 熊自柳², 苗斌¹(

), 田秀刚³, 齐建军⁴, 郑士建¹(

)

^1.河北工业大学材料科学与工程学院天津 300401
^2.河钢材料技术研究院石家庄 050023
^3.唐山钢铁集团有限责任公司技术中心唐山 063000
^4.河钢股份有限公司石家庄 050023

Influence of Alloying Elements on Interfacial Layer- and Galvanized Layer-Structure of New Hot-dip Galvanized Dual-phase Steel

LI Yuanyuan¹, LIANG Jian¹, XIONG Ziliu², MIAO Bin¹(

), TIAN Xiugang³, QI Jianjun⁴, ZHENG Shijian¹(

)

^1.School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China
^2.HBIS Material Technology Research Institute, Shijiazhuang 050023, China
^3.Technical Center of Tangshan Iron and Steel Group Co. Ltd., Tangshan 063000, China
^4.HBIS Co. Ltd., Shijiazhuang 050023, China

引用本文:

李沅沅, 梁健, 熊自柳, 苗斌, 田秀刚, 齐建军, 郑士建. 新型热镀锌双相钢的合金成分对界面层和镀层结构的影响[J]. 材料研究学报, 2024, 38(6): 446-452.
Yuanyuan LI, Jian LIANG, Ziliu XIONG, Bin MIAO, Xiugang TIAN, Jianjun QI, Shijian ZHENG. Influence of Alloying Elements on Interfacial Layer- and Galvanized Layer-Structure of New Hot-dip Galvanized Dual-phase Steel[J]. Chinese Journal of Materials Research, 2024, 38(6): 446-452.

全文: PDF(6181 KB) HTML

摘要:

用对粘方式制备热镀锌双相钢DP980样品，用TEM表征其截面，用TEM结合电子衍射和EDS表征其界面层结构和镀锌层结构并构建其空间关系。结果表明，与DP780在退火阶段合金元素Mn的外氧化不同，DP980主要发生内氧化和Cr元素与Mn元素的竞争性氧化，界面层中较少的MnO促进热镀锌过程中的Fe-Al反应而生成了连续致密的Fe₂Al₅抑制层，抑制了镀锌阶段的Fe-Zn反应而使DP980具有较好的热镀锌性能。同时，这种结构使弥散分布在镀锌层中的η-Zn基体生成Fe₃Zn₁₀纳米晶而避免生成有较大脆性Fe-Zn相的镀层结构，使DP980保持较好的力学性能。

关键词 ：材料表面与界面, 镀锌双相钢, 微观结构表征, 选择性氧化, 界面层结构, 镀锌层结构

Abstract：

Hot-dip galvanized dual-phase steel DP980 samples were prepared by adhesive method, and their cross-sections were characterized by TEM. The interface layer structure and zinc coating structure were characterized by TEM combined with SAED and EDS. Then spatial morphology and composition distribution of the interfacial layer and galvanized layer was figured. The results indicated that unlike DP780, which mainly undergoes external oxidation of Mn during the annealing stage, DP980 mainly undergoes internal oxidation. Due to the presence of Cr, its oxidation competes with that of Mn. Less MnO in the interface layer may facilitate the Fe-Al reaction in the hot galvanizing process, forming a continuous and dense Fe₂Al₅ inhibiting layer, which can effectively inhibit the Fe-Zn reaction in the galvanizing stage. This is the main reason why DP980 has good hot dip galvanizing performance. In addition, this structure leads to the formation of Fe₃Zn₁₀ nanocrystals dispersed in the η-Zn matrix. This can avoid the formation of a galvanized layer structure containing large size of brittle Fe-Zn phase, which is beneficial for DP980 to maintain good mechanical properties.

Key words： surface and interface in the materials galvanized dual-phase steel microstructure characterization selective oxidation interface layer structure galvanized layer structure

收稿日期: 2023-08-28

ZTFLH:

TG174

基金资助:国家自然科学基金(52101013);河北省中央引导地方科技发展资金项目(226Z1012G);河钢材料技术研究院合作研究项目(HG2021104,HG2021123)

通讯作者: 苗斌，副教授，miaobin@hebut.edu.cn，研究方向为先进金属材料透射电子显微学
郑士建，教授，sjzheng@hebut.edu.cn，研究方向为先进层状材料制备、表征与性能

Corresponding author: MIAO Bin, Tel: 13167361369, E-mail: miaobin@hebut.edu.cn
ZHENG Shijian, Tel: 13654039173, E-mail: sjzheng@hebut.edu.cn

作者简介: 李沅沅，女，1998年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2023.424 或 https://www.cjmr.org/CN/Y2024/V38/I6/446

图1 热镀锌双相钢TEM截面表征样品的制备示意图

图2 热镀锌DP980双相钢的界面层STEM-EDS

图3 热镀锌DP980双相钢界面层的物相分析

图4 热镀锌DP980双相钢镀锌层的物相分析

图5 热镀锌DP980双相钢的界面层和镀锌层的STEM-EDS

图6 热镀锌DP780、DP980双相钢的氧化物分布结构示意图

图7 热镀锌DP780、DP980双相钢的界面层和镀锌层示意图

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