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In this paper, the continuous cooling transformation (CCT) curve of test steel is determined with FORMAS-TOR-F full automatic phase transformation instrument by taking low carbon medium manganese steel as the object of study. The results showed that the microstructure at room temperature was proeutectoid ferrite + pearlite when the cooling rate was 0.1~0.5 ℃/s; when the cooling rate was 1~2 ℃/s, there was granular bainite and the microstructure at room temperature was ferrite + pearlite + granular bainite; when the cooling rate was 5~10 ℃/s, the bainite gradually transformed to martensite, so the martensite increased continuously and it was the mixed microstructure of martensite + bainite at room temperature; when the cooling rate was greater than 10.0℃/s, it was martensite structure at room temperature, which provide references for formulating heat treatment 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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