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| Effect of Si content and surface defects on hot-dip galvanizing layer of Q235 hot-rolled steel sheet |
| NIU Yue-wei1,2, LI Yi-lun3, LIU Chao3, YANG Zhi-gang1,2, HUANG Wei-li1,2, YANG Shu-feng4 |
1. Technology Center, Delong Steel Co., Ltd., Xingtai 054009, Hebei, China;
2. Hebei Hot Rolled Plate and Strip Technology Innovation Center, Xingtai 054009, Hebei, China;
3. Institute for Advanced Materials and Technology, University of Science and Technology, Beijing 100083, China;
4. School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083, China |
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Abstract In order to study the effect of Si content and surface defects on hot-dip galvanizing layer of Q235 hot-rolled steel sheet, the cross-sectional morphology, thickness and element distribution for hot-rolled steel sheets of Q235 with different Si content and different surface physicochemical properties under the same dip coating conditions were investigated using coating thickness gauge, scanning electron microscopy and energy spectroscopy and so on. The results show that, when the mass fraction of Si element is greater than 0.15%, the Zn-Al phase decreases and the pure Zn phase concentrates due to the bias of Al elements, and abnormal Fe-Al intermetallic compounds grows at the interface, leading to increase in the thickness and decrease in the bonding strength of the layer. The absence of Fe-Al intermetallic compound layer due to holes in the plating for flame-cut side of the steel is found, leading to inward expansion of the layer and uneven layer thickness. Therefore, the mass fraction of Si element in Q235 steel used for hot-dip galvanizing should be controlled below 0.15%, and the use of flame cutting process can be reduced, or the surface treatment of the flame-cut plate can be carried out to improve the quality of the steel surface plating.
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Received: 30 September 2022
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| [1] |
魏宝民,何召龙,王孝建,等. 材料成分对热镀锌钢板性能及表面质量的影响[J]. 中国冶金,2020,30(10):71.
|
| [2] |
钱胜,顾清,李学通,等. 镀锌机组带钢C翘缺陷综合治理技术的开发[J]. 钢铁,2021,56(11):160.
|
| [3] |
高圣伦,孙彬,赵路路. 镀锌基板氧化铁皮在还原过程中的组织演变[J]. 轧钢,2022,39(4):46.
|
| [4] |
姜贵松,刘少先,葛志勇,等. 合金化热镀锌板表面条状缺陷原因分析[J]. 轧钢,2022,39(4):126.
|
| [5] |
宋志超,韩雄超,张才华,等. 热镀锌增强成形性双相钢表面色差缺陷研究[J]. 轧钢,2022,39(4):81.
|
| [6] |
SU X,WU C,LIU D,et al. Effect of vanadium on galvanizing Si-containing steels[J]. Surface and Coatings Technology,2010,205(1):213.
|
| [7] |
裴滢,许乔瑜,卢锦堂,等. 含硅钢材表面状态对热镀锌层影响的探讨[C]//第六届中国热浸(渗)镀学术技术交流会论文集. 上海:中国腐蚀与防护学会,2001:51.
|
| [8] |
易容华. 火焰切割对低合金高强度钢的影响[J]. 施工技术,2007(36):330.
|
| [9] |
LI J,DU A,FAN Y,et al. Effect of shot-blasting pretreatment on microstructures of hot-dip galvanized coating[J]. Surface and Coatings Technology,2019,364:218.
|
| [10] |
Sa-nguanmoo R,Nisaratanaporn E,Boonyongmaneerat Y. Hot-dip galvanization with pulse-electrodeposited nickel pre-coatings[J]. Corrosion Science,2011,53(1):122.
|
| [11] |
Shibli S M A,Manu R. Process and performance improvement of hot dip zinc coating by dispersed nickel in the under layer[J]. Surface and Coatings Technology,2005,197(1):103.
|
| [12] |
程玉杰,李慧蓉,宋宏伟,等. 热浸镀助镀剂的研究现状[J]. 热加工工艺,2019,48(12):12.
|
| [13] |
Shibli S M A,Meena B N,Remya R. A review on recent approaches in the field of hot dip zinc galvanizing process[J]. Surface and Coatings Technology,2015,262:210.
|
| [14] |
秦大伟,刘宏民,张栋,等. 带钢热镀锌镀层单位面积质量神经网络预测模型[J]. 钢铁,2020,55(5):68.
|
| [15] |
储双杰,金鑫焱,毕文珍. 内氧化对热镀锌高强钢镀层/基板界面的影响[J]. 钢铁,2021,56(12):126.
|
| [16] |
夏雪松,梁媛媛,高伟耀,等. 有花热基镀锌板锌花均匀性研究及其工业化控制[J]. 轧钢,2022,39(4):56.
|
| [17] |
左芳,罗功刚,许锦泉,等. 浅谈如何解决火焰切割厚板过程中的断面外观问题[J]. 装备制造技术,2022(5):156.
|
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2023, Vol. 33 
