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The effect of cooling water between rolling mills on the surface microstructure uniformity of UF340 was investigated using hot rolling experiments and full-process tracking. The results show that the cooling water between rolling mills has certain effect on the organization uniformity of the hot rolled coil along the transverse direction, and will be partially inherited to the final UF340 strip organization. When the cooling water between rolling mills is fully open, a small amount of non-recrystallized grain is retained on the surface of the final UF340 strip located at about 1/4 from the edge. When the latter part of water between rolling mills is closed, due to the full recrystallization during hot rolling, the final product has a better consistency of the organization along the transverse direction, presenting a fine and fully recrystallized tissue on the surface, which is beneficial to improving surface Distinctness of Image (DOI) of the material. The extraordinary uniformity of the microstructure makes the waviness of the UF340 after painting and deforming is as low as 0.169 μm, and DOI value reaches 92, which fully meets the requirements of the surface quality for the intercoat-free coating process.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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