合金化热镀锌IF钢表面亮条纹缺陷分析
INVESTIGATION OF BRIGHT STREAK ON THE COATING SURFACE OF HOT-DIP GALVANNEALED IF STEEL
摘 要
利用光学显微镜、扫描电镜和能谱分析仪分析了合金化热镀锌IF钢板表面的亮条纹缺陷。条纹部位与正常部位相比,镀层的表面形貌、截面特征以及侵蚀锌层后的钢板表面形貌均有不同。造成条纹的直接原因是钢板表面的微裂纹,而引起微裂纹的原因是Al2O3颗粒。
IF钢
亮条纹
Al2O3
微裂纹
hot-dip galvanneal
IF Steel
bright Streak
Al2O3
mirco-crack
Abstract
To improve the surface quality of hot-dip galvannealed IF steel in industrial continuous galvanizing line,the morphology and formation mechanism of a bright streak have been investigated by optical microscopy,scanning electron microscopy and energy dispersive spectrometer. The coating morphology,cross-section and the substrate morphology after removing the zinc coating are different between the streak site and the normal site. It is obvious that the streak is caused by the micro-cracks in the surface and subsurface of the substrate. And the micro-cracks are caused by Al2O3.
中图分类号 TG174.445
所属栏目 质量控制与失效分析
基金项目
收稿日期 2007/7/20
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网络出版日期
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备注金鑫焱(1979-),男,工程师,硕士。
引用该论文: JIN Xin-yan,LIU Xin,QIAN Hong-wei. INVESTIGATION OF BRIGHT STREAK ON THE COATING SURFACE OF HOT-DIP GALVANNEALED IF STEEL[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2008, 44(12): 698～701
金鑫焱,刘 昕,钱洪卫. 合金化热镀锌IF钢表面亮条纹缺陷分析[J]. 理化检验－物理分册, 2008, 44(12): 698～701
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参考文献
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【2】Hong M H,Paik D J. The effects of additional elements on the surfaces of steel sheet substrates depend on the different states of annealing processes before hop-dip galvanizing \[C\]// 6th International Conference on Zinc and Zinc Alloy Coated Steel Sheet (Galvatech 2004). Chicago,IL: Warrendale PA,2004:1145-1154．
【3】Hong M H,Nam T H,Han D S,et al. Characterization of surface defects on hot-dip galvannealed sheet steel [J]. Journal of the Korean Institute of Metals and Materials (South Korea),2002,40(2): 206-214．
【4】Hong M H,Paik D J. Investigation of streaky marks formed on the coating surface of hot-dip galvannealed steel sheets [J]. Praktische Metallographie,2006,43(5): 237-251．
【5】Urai M,Arimura M,Sakai H. Effect of scratch on a substrate on a protrusive surface defects of galvannealed steel sheet [J]. Tetsu-to-Hagane (J Iron Steel Inst Jpn),1995,81(2): 129-134．
【6】Chen H B,Chang L,Cheng H C. investigation and Improvement of GA streaky mark [J]. Technology and Training (Taiwan),2004,29(1): 56-62．
【7】Hong M H,Hwang G S,Chung J H. Microstructure of surface defects observed on continuous hot-dip galvanized and galvannealed coating steels [J]. Journal of the Korean Institute of Metals and Materials (South Korea),2002,40(1): 83-92．
【8】O’Dell S P,Charles J,Randle V. The formation of craters within the galvanneal coating and their effects on processing properties [J]. Iron and Steelmaker,2003,30(12): 41-46．
【9】Morimoto Y,McDevitt E,Meshii M. Characterization of the Fe-Al inhibition layer formed in the initial stages of hot-dip galvannealing[J]. ISIJ International,1997,37(9): 906-913．
【10】Carless S P,Jenkins G A,Randle V. Influence of substrate topography on formation of FeZn phases and properties of galvanneal coatings[J]. Ironmaking and Steelmaking,2000,27(1): 69-74．
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