|
|
Analysis of the mechanism of sliver-type embossment defect on the surface of cold rolled hot galvanized sheet |
KE Jiang-jun1,HU Hai-jiang2,XU Guang2,YUAN Qing2 |
(1. Huangshi Sunny Xingye Strip Co., Ltd., Huangshi 435000, China 2. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China) |
|
|
Abstract Focusing on the defect in hot galvanized sheet, optical microscope, scanning electron microscope and energy disperse spectroscopy were employed to observe the morphology and detect the chemical position of the embossment defect. Furthermore, the formation reason of sliver-type embossment defect on the surface of cold rolled hot galvanized sheet was analyzed. Judging by the structure and energy spectrum results of some embossment defects, it could be concluded that the appearance of longitudinal crack or peeling before the galvanization technology was considered as the main reason for the appearance of sliver-type embossment defect over the sheet. During the galvanizing process, liquid zinc stacked and grew in the crack and peeling of the sheet, which resulted in the formation of the embossment defect. The hardness of the matrix outer the embossment defect was larger, which was hard to be absolutely blown because that the liquid zinc was wrapped by the outer surface of embossment defect and the matrix of steel. And the residual led to the formation of sliver-type embossment defect.
|
Received: 28 June 2018
Published: 28 February 2019
|
|
|
|
[1] |
岑耀东.超薄锌层热镀锌板的研究进展[J].材料热处理技术, 2012, 41(2):152-156
|
[2] |
王连军,赵卫国,孙海燕,田维政,梁 荣,谷凤龙. 冷轧镀锌板表面线状凸起缺陷分析与改善措施[J].2009年薄板坯连铸连轧国际研讨会论文集,南京, 2009, :267-270
|
[3] |
王宝川,李 涛,郑学斌,金 磊,韩龙帅,杨建炜.冷轧热镀锌板冲压锌层剥落原因分析[J].塑性工程学报, 2016, 23(5):168-172
|
[4] |
张彦文,陈 宇,许竹桃,张友登.热镀锌板线状缺陷分析方法探讨[J].武汉科技大学学报, 2013, 36(3):186-189
|
[5] |
魏远征,李书黎,周学俊,苗景国,宋书鹏,吴 润.冷轧热镀锌板表面线状缺陷特征及形成原因[J].表面技术, 2012, 41(5):93-95
|
[6] |
蒋光锐,刘李斌,王自成,李 洁.热镀锌板镀层表面点状缺陷的分析方法[J].轧钢, 2015, 32(5):40-44
|
[7] |
李 超,高 菊,朱立光,王硕明.热镀锌板表面颗粒状缺陷的分析研究[J].铸造技术, 2015, 36(8):1953-1954
|
[8] |
邵慧琪,阮 强,刘 燕,杨 春,刘杰民,贾云海.冷轧热镀锌板表面条形缺陷的分析及形成原因探讨[J].冶金分析, 2015, 35(4):1-7
|
|
|
|