| WEI Yuan-zheng,LI Shu-li,ZHOU Xue-jun,MIAO Jing-guo,SONG Shu-peng,WU Run.Characteristic and Forming Reason of a Sliver-type Defect on the Surface of CSP-hot Galvanized Sheets[J],(5):93-95,113 |
| Characteristic and Forming Reason of a Sliver-type Defect on the Surface of CSP-hot Galvanized Sheets |
| Received:April 18, 2012 Revised:October 20, 2012 |
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| DOI： |
| KeyWord:sliver-type defect CSP hot galvanized sheets |
| Author | Institution |
| WEI Yuan-zheng |
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan , China |
| LI Shu-li |
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan , China |
| ZHOU Xue-jun |
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan , China |
| MIAO Jing-guo |
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan , China |
| SONG Shu-peng |
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan , China |
| WU Run |
School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan , China |
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| Abstract: |
| The quality of the CSP-hot galvanized sheets was decreased by some sliver-type surface defects. The morphology, structure and component of the defect were analyzed by using optical microscope, XRD and SEM-EDS. The results showed that the oxides(FeO)formed in CSP hot rolling led to the defect. The oxides were pressed in or elongated in the surface layer of the steel in a centimeter-scale to meter-scale during hot rolling and cold rolling. Finally the oxides were rolled into point-chain shaped lines along the rolling direction. Appearance of the lines were intensified by galvanizing. Accordingly, the measures of reducing oxides on the surface of steel in production were supposed to eliminate the defect. |
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