頁籤選單縮合
題名 | Surface Rolled-in Defects of Titanium Hot Roll Band in HSM= |
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作者 | Wang, Wei-lin; Wu, Ming-tao; Huang, Chao-chi; Pan, Yeong-tsuen; Lin, Szu-ning; |
期刊 | China Steel Technical Report |
出版日期 | 20151200 |
卷期 | 28 2015.12[民104.12] |
頁次 | 頁29-34 |
分類號 | 454.88 |
語文 | eng |
關鍵詞 | Commercially pure titanium; CP Ti; Surface quality; Oxide scale; Rolled-in defect; |
英文摘要 | The oxide scale produced in the steel making process should be considered due to its after effect on surface quality. For manufacturing Commercially Pure Titanium (CP Ti) hot roll band, the HSM should tune many of the process parameters to adapt for the physical properties of titanium. In this study, the occurrence of top and bottom surface defects related to the oxidation behavior during the hot rolling process is investigated and analyzed using XRD, SEM and TEM. Based on the mechanism of titanium oxidation, only rutile TiO2 can be regarded as the oxide scale. The titanium suboxides (TixO, x = 2, 3, and 6) forming underneath the TiO2 oxide scale belong to a kind of oxygen interstitial solid solution. After analyzing the microstructure of the titanium matrix, oxide layer and defect/matrix interface, we found that the titanium surface is easily scratched at high temperatures by the HSM equipment such as the side guide, pinch roll and baffle board. These scratched titanium slices will oxidize further and then be rolled into the surface easily. By scrutinizing the crystalline phase and chemical composition of rolled-in defects, the formation mechanism of defects can be established. |
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