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Outline
In order to study the weldability of wind power steel Q420ME, the SH-CCT (simulated heat-affected zone continuous cooling transformation) curve is determined, temperatures of Ac1 and Ac3 for wind power steel Q420ME are 690 ℃ and 920 ℃ separately. The SH-CCT curve analysis shows that the bainite transformation occurs first, followed by martensite transformation during cooling process as well as the microstructure is bainite and martensite when cooling rate is 10~40 ℃/s. With the increase of cooling rate, the content of bainite is decreased, while content of martensite and hardness of wind power steel Q420ME are increased.
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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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