It will be one of effective means to improve the performances of hot-rolled section steel to replace the microalloy addition with green, energy-saving, low-cost and resource-friendly controlled cooling technology after rolling. The metallographic structure of product with controlled cooling after hot rolling is ferrite + pearlite, the morphology is fine, performance is uniform, yield strength is increased by about 70~100 MPa and tensile strength is increased by about 80~150 MPa. In the paper, the research ideas, methods, experimental simulation and application examples of controlled cooling after rolling for high-strength section steel are introduced by taking angle steel as an example. The results show that the experimental data and simulated results are consistent with the production practices, which proves that the research method proposed in this paper is accurate and effective so that it can provide the reference for researching controlled cooling of angle steel and other hot-rolled section steels.
| 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 |