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In the paper, the study on influences of quenching temperature, holding time of quenching, tempering temperature and holding time of tempering on microstructure and properties of test steel is carried out by taking as-hot-rolled 10Cr5MoVRE seamless steel pipe as the object of study. The study results showed that the yield strength, tensile strength and hardness (HRC) of test steel were first increased and then decreased while elongation and impact energy were decreased with the increase of quenching temperature; yield strength, tensile strength and hardness (HRC) of test steel were decreased while elongation was increased as well as impact energy was first increased and then decreased with the extension of holding time of quenching; yield strength of test steel was increased by about 17.5%, tensile strength was increased by about 18.2% and impact energy was decreased by 8.1% with the increase of tempering temperature; strength and hardness of test steel were decreased while impact energy was gradually increased with the extension of holding time of tempering.
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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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