PDF
Full
Outline
Such parameters as the outlet temperatures of crystallizer and secondary cooling section and shell thickness of manufacturing 2 types of rectangular billet with cross-section dimensions of 280 mm×380 mm and 320 mm×415 mm are simulated through high temperature thermal simulation experiments and computer software as well as the production process parameters of manufacturing YQ450NQR1 weathering steel with the billets of 2 different cross sections are compared. The results showed that the low magnification quality of billet was related to amplitude of crystallizer, amount of secondary cooling water, number of strands for continuous casting machine and temperature of exiting secondary cooling section while entering tension leveler. With the decrease of amplitude of crystallizer, increase of number of strands for continuous casting machine and temperature of entering tension leveler, the quality of billet is improved. When the amplitude of crystallizer is ±2.5 mm and temperature of entering tension leveler is greater than 940 ℃ with the condition of weak cold secondary cooling water, the low magnification quality of billet with cross section of 280 mm×380 mm of peritectic weathering steel is better than that of billet with cross section of 320 mm×415 mm.
PDF
93
40
| 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 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
